ORCID Profile
0000-0001-6210-5842
Current Organisation
Australian National University
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Research Topics
In Research Link Australia (RLA), "Research Topics" refer to ANZSRC FOR and SEO codes. These topics are either sourced from ANZSRC FOR and SEO codes listed in researchers' related grants or generated by a large language model (LLM) based on their publications.
Top 5 Research Topics
ANZSRC Field of Research (FoR)
Optical Physics | Astronomical and Space Sciences | General Relativity and Gravitational Waves | Optics And Opto-Electronic Physics | Instruments And Techniques | Quantum Optics And Lasers | Astronomical and Space Instrumentation | Quantum Optics | Lasers and Quantum Electronics | Classical and Physical Optics | Astronomical Sciences Not Elsewhere Classified | Quantum Physics | Photonics, Optoelectronics and Optical Communications | Synchrotrons; Accelerators; Instruments and Techniques | Nonlinear Optics and Spectroscopy | Optical And Photonic Systems | Astronomical and Space Sciences not elsewhere classified | Other Physical Sciences | Astronomical sciences | Sensor Technology (Chemical aspects) | Analytical Spectrometry | Photodetectors, Optical Sensors and Solar Cells | Library and Information Studies | Lasers and quantum electronics | Information Storage, Retrieval And Management | Communications Technologies | Manufacturing Processes and Technologies (excl. Textiles) | Space instrumentation | Electrical and Electronic Engineering | Nanoscale Characterisation | Cosmology and extragalactic astronomy | Distributed and Grid Systems | General relativity and gravitational waves | Aerospace Structures | Quantum Information, Computation and Communication | Optical Fibre Communications | Physical Sciences Not Elsewhere Classified
ANZSRC Socio-Economic Objective (SEO)
Expanding Knowledge in the Physical Sciences | Physical sciences | Expanding Knowledge in Technology | Expanding Knowledge in Engineering | Scientific instrumentation | Scientific Instruments | Navy | Application tools and system utilities | Emerging Defence Technologies | Network switching equipment | Aerospace equipment | Measurement Standards and Calibration Services not elsewhere classified | Environmentally Sustainable Commercial Services and Tourism not elsewhere classified | Communication Networks and Services not elsewhere classified | Oil and gas | Industrial instrumentation | Higher education | Professional, Scientific and Technical Services | Expanding Knowledge in the Information and Computing Sciences |
Related Links
Publications
Technology developments for ACIGA high power test facility for advanced interferometry
Publisher: IOP Publishing
Date: 21-04-2005
Search for High-energy Neutrinos from Binary Neutron Star Merger GW170817 with ANTARES, IceCube, and the Pierre Auger Observatory
Publisher: arXiv
Date: 2017
Squeezed light in a frontal-phase-modulated signal-recycled interferometer
Publisher: American Physical Society (APS)
Date: 05-1998
Power-recycled Michelson interferometer with resonant sideband extraction
Publisher: The Optical Society
Date: 03-2003
DOI: 10.1364/AO.42.001283
Abstract: We present a system for the control and signal extraction of a power-recycled Michelson interferometer with resonant sideband extraction. This control system is capable of locking four degrees of freedom to a fixed point while locking the signal cavity to an arbitrary detuned point. One of the strengths of this system is that it can quickly change the instrument's frequency response without disrupting continuous operation. We report on an experimental implementation of this control system on a benchtop prototype and present broadband measurements of the prototype's frequency response for a range of signal cavity detunings.
A Gravitational-wave Measurement of the Hubble Constant Following the Second Observing Run of Advanced LIGO and Virgo
Publisher: American Astronomical Society
Date: 03-2021
Abstract: This paper presents the gravitational-wave measurement of the Hubble constant ( H 0 ) using the detections from the first and second observing runs of the Advanced LIGO and Virgo detector network. The presence of the transient electromagnetic counterpart of the binary neutron star GW170817 led to the first standard-siren measurement of H 0 . Here we additionally use binary black hole detections in conjunction with galaxy catalogs and report a joint measurement. Our updated measurement is H 0 = 69 − 8 + 16 km s −1 Mpc −1 (68.3% of the highest density posterior interval with a flat-in-log prior) which is an improvement by a factor of 1.04 (about 4%) over the GW170817-only value of 69 − 8 + 17 km s −1 Mpc −1 . A significant additional contribution currently comes from GW170814, a loud and well-localized detection from a part of the sky thoroughly covered by the Dark Energy Survey. With numerous detections anticipated over the upcoming years, an exhaustive understanding of other systematic effects are also going to become increasingly important. These results establish the path to cosmology using gravitational-wave observations with and without transient electromagnetic counterparts.
Direct observation of the thermal noise spectrum of a silicon flexure membrane
Publisher: AIP Publishing
Date: 09-01-2023
DOI: 10.1063/5.0131984
Abstract: We present a direct measurement of the displacement noise spectrum of a macroscopic silicon flexure at room temperature. A cantilever attached to the 100 μm thick flexure holds a mirror which forms part of an optical cavity to enhance the displacement sensitivity to thermal noise. We predict the displacement noise spectrum using a simple model that assumes the dominant source of frequency-dependent loss is thermo-elastic d ing and find good agreement with the experimental data. The measurement is consistent with a frequency-independent loss of ϕ0,fi=1.6×10−5 combined with frequency-dependent thermo-elastic d ing as the dominant losses. A crossover between the two that occurs well above the flexure resonant frequency allows a broadband measurement of the thermal noise of the silicon flexure. The flexure material, geometry, and measurement band are similar to those of planned future gravitational wave detectors.
Search for Gravitational Waves Associated with Gamma-Ray Bursts Detected by Fermi and Swift during the LIGO–Virgo Run O3b
Publisher: American Astronomical Society
Date: 04-2022
Abstract: We search for gravitational-wave signals associated with gamma-ray bursts (GRBs) detected by the Fermi and Swift satellites during the second half of the third observing run of Advanced LIGO and Advanced Virgo (2019 November 1 15:00 UTC–2020 March 27 17:00 UTC). We conduct two independent searches: a generic gravitational-wave transients search to analyze 86 GRBs and an analysis to target binary mergers with at least one neutron star as short GRB progenitors for 17 events. We find no significant evidence for gravitational-wave signals associated with any of these GRBs. A weighted binomial test of the combined results finds no evidence for subthreshold gravitational-wave signals associated with this GRB ensemble either. We use several source types and signal morphologies during the searches, resulting in lower bounds on the estimated distance to each GRB. Finally, we constrain the population of low-luminosity short GRBs using results from the first to the third observing runs of Advanced LIGO and Advanced Virgo. The resulting population is in accordance with the local binary neutron star merger rate.
Laser Interferometer Gravitational-wave Observatories: An Overview
Publisher: Informa UK Limited
Date: 11-1990
Noiseless electro-optic processing of optical signals generated with squeezed light
Publisher: The Optical Society
Date: 02-02-1998
DOI: 10.1364/OE.2.000100
Abstract: We demonstrate an elegant way of handling optical signals which are generated using squeezed states of light without losing their improved signal to noise ratio. We do this by lifing, without significant noise penalty, both signal and noise away from the quantum noise limit into the classical domain. This makes the information robust to losses. Our system achieves a signal transfer coefficient, T(s), close to unity. As a demonstration we lify a small signal carried by 35% litude squeezed light and show that unlike the fragile squeezed input, the signal lified output is robust to propagation losses. A signal transfer coefficient of T(s) = 0.75 is achieved even in the presence of large introduced (86%) downstream losses.
Are We There Yet? The Road to Gravitational Wave Detection
Publisher: Cambridge University Press (CUP)
Date: 2013
DOI: 10.1071/AS04064
Abstract: Giant laser interferometers are currently ‘listening’ for gravitational waves but are they sensitive enough? I briefly review the status of the global effort to detect gravity waves and overview Australia's role.
Search for Eccentric Binary Black Hole Mergers with Advanced LIGO and Advanced Virgo during Their First and Second Observing Runs
Publisher: American Astronomical Society
Date: 30-09-2019
Abstract: When formed through dynamical interactions, stellar-mass binary black holes (BBHs) may retain eccentric orbits ( e 0.1 at 10 Hz) detectable by ground-based gravitational-wave detectors. Eccentricity can therefore be used to differentiate dynamically formed binaries from isolated BBH mergers. Current template-based gravitational-wave searches do not use waveform models associated with eccentric orbits, rendering the search less efficient for eccentric binary systems. Here we present the results of a search for BBH mergers that inspiral in eccentric orbits using data from the first and second observing runs (O1 and O2) of Advanced LIGO and Advanced Virgo. We carried out the search with the coherent WaveBurst algorithm, which uses minimal assumptions on the signal morphology and does not rely on binary waveform templates. We show that it is sensitive to binary mergers with a detection range that is weakly dependent on eccentricity for all bound systems. Our search did not identify any new binary merger candidates. We interpret these results in light of eccentric binary formation models. We rule out formation channels with rates ≳100 Gpc −3 yr −1 for e 0.1, assuming a black hole mass spectrum with a power-law index ≲2.
Experimental demonstration of a classical analog to quantum noise cancellation for use in gravitational wave detection
Publisher: American Physical Society (APS)
Date: 23-04-2004
Binary Black Hole Population Properties Inferred from the First and Second Observing Runs of Advanced LIGO and Advanced Virgo
Publisher: American Astronomical Society
Date: 11-09-2019
Broadband and tuned signal recycling with a simple michelson interferometer
Publisher: The Optical Society
Date: 09-1998
DOI: 10.1364/AO.37.005886
Abstract: We present experimental data on the frequency response of both broadband and tuned signal recycling with a benchtop Michelson interferometer. These data are in excellent agreement with our simple theoretical model. We use in-line modulation to give a control system that provides a high degree of orthogonality between the two servo loops.
Kerr noise reduction and squeezing
Publisher: IOP Publishing
Date: 08-2000
Erratum: Search for gravitational waves from Scorpius X-1 in the second Advanced LIGO observing run with an improved hidden Markov model [Phys. Rev. D 100 , 122002 (2019)]
Publisher: American Physical Society (APS)
Date: 23-11-2021
Investigation of polarisation effects in injection locked lasers
Publisher: Springer Science and Business Media LLC
Date: 05-1997
The basic physics of the binary black hole merger GW150914
Publisher: Wiley
Date: 04-10-2016
Experimental demonstration of a squeezing-enhanced power-recycled Michelson interferometer for gravitational wave detection
Publisher: American Physical Society (APS)
Date: 23-05-2002
Optical absorption spectrometry using laser amplitude modulation
Publisher: IEEE
Date: 10-2009
Quantum enhanced kHz gravitational wave detector with internal squeezing
Publisher: IOP Publishing
Date: 05-03-2020
Impact of non-stationary events on low frequency homodyne detection
Publisher: IOP Publishing
Date: 07-2008
A shot-noise limited fiber laser source by cascaded passive optical filtering
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 06-2010
Algebraic cancellation of polarisation noise in fibre interferometers
Publisher: The Optical Society
Date: 04-05-2016
DOI: 10.1364/OE.24.010486
Arm cavity resonant sideband control for laser interferometric gravitational wave detectors
Publisher: The Optical Society
Date: 08-1999
DOI: 10.1364/OL.24.001014
Abstract: We present a new optical control scheme for a laser interferometric gravitational wave detector that has a high degree of tolerance to interferometer spatial distortions and noise on the input light. The scheme involves resonating the rf sidebands in an interferometer arm cavity.
First upper limits from LIGO on gravitational wave bursts
Publisher: American Physical Society (APS)
Date: 07-05-2004
Frequency locking a laser to an optical cavity by use of spatial mode interference
Publisher: The Optical Society
Date: 11-1999
DOI: 10.1364/OL.24.001499
Abstract: We present a novel technique to frequency lock a laser to an optical cavity. This technique, tilt locking, utilizes a misalignment of the laser with respect to the cavity to produce a nonresonant spatial mode. By observing the interference between the carrier and the spatial mode one can obtain a quantum-noise-limited frequency discriminator. Tilt locking offers a number of potential benefits over existing locking schemes, including low cost, high sensitivity, and simple implementation.
Neutron Star Extreme Matter Observatory: A kilohertz-band gravitational-wave detector in the global network
Publisher: Cambridge University Press (CUP)
Date: 2020
DOI: 10.1017/PASA.2020.39
Abstract: Gravitational waves from coalescing neutron stars encode information about nuclear matter at extreme densities, inaccessible by laboratory experiments. The late inspiral is influenced by the presence of tides, which depend on the neutron star equation of state. Neutron star mergers are expected to often produce rapidly rotating remnant neutron stars that emit gravitational waves. These will provide clues to the extremely hot post-merger environment. This signature of nuclear matter in gravitational waves contains most information in the 2–4 kHz frequency band, which is outside of the most sensitive band of current detectors. We present the design concept and science case for a Neutron Star Extreme Matter Observatory (NEMO): a gravitational-wave interferometer optimised to study nuclear physics with merging neutron stars. The concept uses high-circulating laser power, quantum squeezing, and a detector topology specifically designed to achieve the high-frequency sensitivity necessary to probe nuclear matter using gravitational waves. Above 1 kHz, the proposed strain sensitivity is comparable to full third-generation detectors at a fraction of the cost. Such sensitivity changes expected event rates for detection of post-merger remnants from approximately one per few decades with two A+ detectors to a few per year and potentially allow for the first gravitational-wave observations of supernovae, isolated neutron stars, and other exotica.
Analysis of a sub-shot-noise power recycled Michelson interferometer
Publisher: IOP Publishing
Date: 12-02-2004
Prospects for observing and localizing gravitational-wave transients with Advanced LIGO, Advanced Virgo and KAGRA
Publisher: Springer Science and Business Media LLC
Date: 28-09-2020
DOI: 10.1007/S41114-020-00026-9
Abstract: We present our current best estimate of the plausible observing scenarios for the Advanced LIGO, Advanced Virgo and KAGRA gravitational-wave detectors over the next several years, with the intention of providing information to facilitate planning for multi-messenger astronomy with gravitational waves. We estimate the sensitivity of the network to transient gravitational-wave signals for the third (O3), fourth (O4) and fifth observing (O5) runs, including the planned upgrades of the Advanced LIGO and Advanced Virgo detectors. We study the capability of the network to determine the sky location of the source for gravitational-wave signals from the inspiral of binary systems of compact objects, that is binary neutron star, neutron star–black hole, and binary black hole systems. The ability to localize the sources is given as a sky-area probability, luminosity distance, and comoving volume. The median sky localization area (90% credible region) is expected to be a few hundreds of square degrees for all types of binary systems during O3 with the Advanced LIGO and Virgo (HLV) network. The median sky localization area will improve to a few tens of square degrees during O4 with the Advanced LIGO, Virgo, and KAGRA (HLVK) network. During O3, the median localization volume (90% credible region) is expected to be on the order of $$10^{5}, 10^{6}, 10^{7}\\mathrm {\\ Mpc}^3$$ 10 5 , 10 6 , 10 7 Mpc 3 for binary neutron star, neutron star–black hole, and binary black hole systems, respectively. The localization volume in O4 is expected to be about a factor two smaller than in O3. We predict a detection count of $$1^{+12}_{-1}$$ 1 - 1 + 12 ( $$10^{+52}_{-10}$$ 10 - 10 + 52 ) for binary neutron star mergers, of $$0^{+19}_{-0}$$ 0 - 0 + 19 ( $$1^{+91}_{-1}$$ 1 - 1 + 91 ) for neutron star–black hole mergers, and $$17^{+22}_{-11}$$ 17 - 11 + 22 ( $$79^{+89}_{-44}$$ 79 - 44 + 89 ) for binary black hole mergers in a one-calendar-year observing run of the HLV network during O3 (HLVK network during O4). We evaluate sensitivity and localization expectations for unmodeled signal searches, including the search for intermediate mass black hole binary mergers.
Environmental noise in advanced LIGO detectors
Publisher: IOP Publishing
Date: 15-06-2021
All-sky search for long-duration gravitational-wave bursts in the third Advanced LIGO and Advanced Virgo run
Publisher: American Physical Society (APS)
Date: 11-11-2021
A stabilized fiber laser for high-resolution low-frequency strain sensing
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 08-2009
Ultra-remote fibre optic acoustic sensing array based on RF modulation
Publisher: IEEE
Date: 06-2007
Fiber laser mode cleaning by frequency locking to a fiber ring cavity
Publisher: IEEE
Date: 06-2007
Interrogation of a passive fiber bragg grating resonator sensor by current modulation of a diode laser
Publisher: IEEE
Date: 2005
Polarization managed sagnac sensing interferometer with inherent backscatter rejection
Publisher: IEEE
Date: 06-2007
Effects of waveform model systematics on the interpretation of GW150914
Publisher: IOP Publishing
Date: 12-04-2017
Optimal quantum noise cancellation with an entangled witness channel
Publisher: American Physical Society (APS)
Date: 28-10-2021
Observation and characterization of an optical spring
Publisher: American Physical Society (APS)
Date: 07-05-2004
Search for gravitational waves from primordial black hole binary coalescences in the galactic halo
Publisher: American Physical Society (APS)
Date: 25-10-2005
Search for gravitational waves from galactic and extra-galactic binary neutron stars
Publisher: American Physical Society (APS)
Date: 25-10-2005
Optimization and transfer of vacuum squeezing from an optical parametric oscillator
Publisher: IOP Publishing
Date: 08-1999
Backscatter-immune, polarization managed, all fiber Sagnac sensing interferometer
Publisher: The Optical Society
Date: 2007
DOI: 10.1364/OE.15.003110
Abstract: We propose a new all fiber Mach-Zehnder-Sagnac hybrid interferometer topology for precision sensing. This configuration utilizes a high coherence laser source, mitigates the effects of Rayleigh backscatter and polarization wander, while eliminating scale factor drift. We also present preliminary experimental results, using telecommunications grade single mode fiber and fiber couplers, to demonstrate its principle of operation.
Model comparison from LIGO–Virgo data on GW170817’s binary components and consequences for the merger remnant
Publisher: IOP Publishing
Date: 16-01-2020
Abstract: GW170817 is the very first observation of gravitational waves originating from the coalescence of two compact objects in the mass range of neutron stars, accompanied by electromagnetic counterparts, and offers an opportunity to directly probe the internal structure of neutron stars. We perform Bayesian model selection on a wide range of theoretical predictions for the neutron star equation of state. For the binary neutron star hypothesis, we find that we cannot rule out the majority of theoretical models considered. In addition, the gravitational-wave data alone does not rule out the possibility that one or both objects were low-mass black holes. We discuss the possible outcomes in the case of a binary neutron star merger, finding that all scenarios from prompt collapse to long-lived or even stable remnants are possible. For long-lived remnants, we place an upper limit of 1.9 kHz on the rotation rate. If a black hole was formed any time after merger and the coalescing stars were slowly rotating, then the maximum baryonic mass of non-rotating neutron stars is at most , and three equations of state considered here can be ruled out. We obtain a tighter limit of for the case that the merger results in a hypermassive neutron star.
Searching for gravitational waves from Cassiopeia A with LIGO
Publisher: IOP Publishing
Date: 17-11-2008
Overview of Interferometer-Type Gravitational Wave Detectors
Publisher: Cambridge University Press (CUP)
Date: 2016
DOI: 10.1017/S1539299600014994
Abstract: Within the next decade giant laser interferometers should detect gravitational waves. Here we present an overview of these instruments including both ground and spaced based antennae.
Shot noise limited fiber laser source by frequency locking to a fiber ring cavity
Publisher: IEEE
Date: 05-2007
Erratum: “Searches for Gravitational Waves from Known Pulsars at Two Harmonics in 2015–2017 LIGO Data” (2019, ApJ, 879, 10)
Publisher: American Astronomical Society
Date: 04-09-2019
Quasi-static strain sensing using molecular spectroscopy
Publisher: SPIE
Date: 15-05-2011
DOI: 10.1117/12.884639
Phase-sensitive interrogation of fiber Bragg grating resonators for sensing applications
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 05-2005
Laser Stabilisation for the Measurement of Thermal Noise
Publisher: Springer Science and Business Media LLC
Date: 03-2000
Entanglement Generation in Superconducting Qubits Using Holonomic Operations
Publisher: American Physical Society (APS)
Date: 09-01-2019
Progress in the search for the optimum light source: Squeezing experiments with a frequency doubler
Publisher: IOP Publishing
Date: 08-1995
Spectroscopic Sensing at the Quantum Limit by Active Cavity Impedance Matching
Publisher: OSA
Date: 2009
Point absorbers in Advanced LIGO
Publisher: Optica Publishing Group
Date: 30-04-2021
DOI: 10.1364/AO.419689
Abstract: Small, highly absorbing points are randomly present on the surfaces of the main interferometer optics in Advanced LIGO. The resulting nanometer scale thermo-elastic deformations and substrate lenses from these micron-scale absorbers significantly reduce the sensitivity of the interferometer directly though a reduction in the power-recycling gain and indirect interactions with the feedback control system. We review the expected surface deformation from point absorbers and provide a pedagogical description of the impact on power buildup in second generation gravitational wave detectors (dual-recycled Fabry–Perot Michelson interferometers). This analysis predicts that the power-dependent reduction in interferometer performance will significantly degrade maximum stored power by up to 50% and, hence, limit GW sensitivity, but it suggests system wide corrections that can be implemented in current and future GW detectors. This is particularly pressing given that future GW detectors call for an order of magnitude more stored power than currently used in Advanced LIGO in Observing Run 3. We briefly review strategies to mitigate the effects of point absorbers in current and future GW wave detectors to maximize the success of these enterprises.
Harmonic demodulation of nonstationary shot noise
Publisher: The Optical Society
Date: 15-05-1993
DOI: 10.1364/OL.18.000759
Abstract: We report on experimental demodulation of nonstationary shot noise, which is associated with strongly modulated light. For sinusoidal modulation and demodulation, measurements confirm theoretical predictions of 1.8-dB excess noise in the modulation quadrature and 3-dB noise reduction in the opposite quadrature, relative to the standard quantum limit. Demodulation with a third harmonic produces noise correlated with that which is due to the fundamental. Reducing excess noise by 0.8 dB in the modulation quadrature, by combining the fundamental and third harmonics in a 2:1 ratio, is shown to be feasible.
Low phase noise squeezed vacuum for future generation gravitational wave detectors
Publisher: IOP Publishing
Date: 20-08-2020
In search of conclusive evidence on the trade-off and pecking order theories of capital structure: Evidence from the Johannesburg Stock Exchange
Publisher: Informa UK Limited
Date: 02-01-2018
Directional limits on persistent gravitational waves using data from Advanced LIGO’s first two observing runs
Publisher: American Physical Society (APS)
Date: 04-09-2019
Polarization speed meter for gravitational-wave detection
Publisher: American Physical Society (APS)
Date: 05-09-2012
Erratum: All-sky search for periodic gravitational waves in LIGO S4 data [Phys. Rev. D77, 022001 (2008)]
Publisher: American Physical Society (APS)
Date: 23-12-2009
Quantum-Enhanced Advanced LIGO Detectors in the Era of Gravitational-Wave Astronomy
Publisher: American Physical Society (APS)
Date: 05-12-2019
Using Salivary Cortisol as an Objective Measure of Physiological Stress in People With Dementia and Chronic Pain: A Pilot Feasibility Study
Publisher: SAGE Publications
Date: 18-06-0015
Abstract: Pain can elevate stress in people with dementia. Although salivary cortisol is used as a biomarker of stress in people with dementia, few studies have reported the feasibility of collection methods to assess salivary cortisol in nursing home residents with both dementia and chronic pain. To explore the feasibility of collecting cortisol via salivary swab as an indicator of stress in people with dementia and chronic pain. Participants ( N = 43) aged ≥ 65 years and living with dementia and chronic pain were randomly assigned to the PARO (in idual, nonfacilitated, 30-min sessions with the robotic seal PARO, 5 days per week for 6 weeks) or usual-care group using computer-generated random numbers. Salivary cortisol was collected in the early morning before the intervention (Week 0) and at the completion of the intervention (Week 6) for comparison. There were multiple challenges associated with saliva collection and analysis, including cognitive impairment of participants, ability to obtain repeated s les with saliva volume adequate for assay, and overall cost. Ultimately, adequate saliva was collected from only 8 participants (both pre- and post-intervention) for assay and quantitative analysis. Considering the multiple challenges involved in obtaining valid saliva s les in this population, salivary cortisol may not be a feasible biomarker of physiological stress in people with dementia and chronic pain.
LIGO’s quantum response to squeezed states
Publisher: American Physical Society (APS)
Date: 13-09-2021
Stabilization of injection-locked lasers using spatial mode interference
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 05-2001
DOI: 10.1109/3.918577
A Shot Noise Limited Fiber Laser Source
Publisher: OSA
Date: 2009
Subfrequency noise signal extraction in fiber-optic strain sensors using postprocessing
Publisher: The Optical Society
Date: 06-2012
DOI: 10.1364/OL.37.002169
Experimental demonstration of in-loop intracavity intensity-noise suppression
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 03-2005
Radiation-pressure-mediated control of an optomechanical cavity
Publisher: American Physical Society (APS)
Date: 18-01-2018
Observation of quadrature squeezing in a cavity-atom system
Publisher: American Physical Society (APS)
Date: 08-1992
Spot size and Guoy phase invariant telescope for auto-alignment of resonant cavities
Publisher: IOP Publishing
Date: 11-02-2004
Shot noise limited fiber laser source for sensing applications
Publisher: SPIE
Date: 14-04-2008
DOI: 10.1117/12.785742
Publisher’s Note: First cross-correlation analysis of interferometric and resonant-bar gravitational-wave data for stochastic backgrounds [Phys. Rev. DPRVDAQ0556-282176, 022001 (2007)]
Publisher: American Physical Society (APS)
Date: 30-07-2007
Searches for Gravitational Waves from Known Pulsars at Two Harmonics in 2015–2017 LIGO Data
Publisher: American Astronomical Society
Date: 26-06-2019
Quantum noise
Publisher: World Scientific
Date: 27-03-2019
Multiplexed interferometric displacement sensing below the laser frequency noise limit
Publisher: SPIE
Date: 15-05-2011
DOI: 10.1117/12.899431
Laser link acquisition demonstration for the GRACE Follow-On mission
Publisher: The Optical Society
Date: 02-05-2014
DOI: 10.1364/OE.22.011351
ACIGA's high optical power test facility
Publisher: IOP Publishing
Date: 11-02-2004
Gravitational-wave physics and astronomy in the 2020s and 2030s
Publisher: Springer Science and Business Media LLC
Date: 14-04-2021
Erratum: “Searches for Gravitational Waves from Known Pulsars at Two Harmonics in 2015–2017 LIGO Data” (2019, ApJ, 879, 10)
Publisher: American Astronomical Society
Date: 26-08-2020
Point Absorber Limits to Future Gravitational-Wave Detectors
Publisher: American Physical Society (APS)
Date: 07-12-2021
Photothermal fluctuations as a fundamental limit to low-frequency squeezing in a degenerate optical parametric oscillator
Publisher: American Physical Society (APS)
Date: 24-10-2005
A squeezed light source operated under high vacuum
Publisher: Springer Science and Business Media LLC
Date: 14-12-2015
DOI: 10.1038/SREP18052
Abstract: Non-classical squeezed states of light are becoming increasingly important to a range of metrology and other quantum optics applications in cryptography, quantum computation and biophysics. Applications such as improving the sensitivity of advanced gravitational wave detectors and the development of space-based metrology and quantum networks will require robust deployable vacuum-compatible sources. To date non-linear photonics devices operated under high vacuum have been simple single pass systems, testing harmonic generation and the production of classically correlated photon pairs for space-based applications. Here we demonstrate the production under high-vacuum conditions of non-classical squeezed light with an observed 8.6 dB of quantum noise reduction down to 10 Hz. Demonstration of a resonant non-linear optical device, for the generation of squeezed light under vacuum, paves the way to fully exploit the advantages of in-vacuum operations, adapting this technology for deployment into new extreme environments.
Erratum: “First Search for Gravitational Waves from Known Pulsars with Advanced LIGO” (2017, ApJ, 839, 12)
Publisher: American Astronomical Society
Date: 13-12-2017
Search for Subsolar Mass Ultracompact Binaries in Advanced LIGO’s Second Observing Run
Publisher: American Physical Society (APS)
Date: 18-10-2019
Setting upper limits on the strength of periodic gravitational waves from PSRJ 1<
Publisher: American Physical Society (APS)
Date: 30-04-2004
The ACIGA data analysis programme
Publisher: IOP Publishing
Date: 10-02-2004
Multi-link laser interferometry architecture for interspacecraft displacement metrology
Publisher: Springer Science and Business Media LLC
Date: 05-09-2018
Guest Editorial Special Issue on Multimedia Big Data in Internet of Things
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 10-2018
Differential cavity mode spectroscopy: A new cavity enhanced technique for the detection of weak transitions
Publisher: Elsevier BV
Date: 06-2008
All-sky search for continuous gravitational waves from isolated neutron stars using Advanced LIGO O2 data
Publisher: American Physical Society (APS)
Date: 08-10-2024
GW170608: Observation of a 19 Solar-mass Binary Black Hole Coalescence
Publisher: American Astronomical Society
Date: 18-12-2017
Lasers and optics: Looking towards third generation gravitational wave detectors
Publisher: Springer Science and Business Media LLC
Date: 13-06-2011
Intensity-noise dependence of Nd:YAG lasers on their diode-laser pump source
Publisher: The Optical Society
Date: 11-1997
Search for gravitational waves associated with the gamma ray burst GRB030329 using the LIGO detectors
Publisher: American Physical Society (APS)
Date: 12-08-2005
All-sky search for continuous gravitational waves from isolated neutron stars in the early O3 LIGO data
Publisher: American Physical Society (APS)
Date: 08-10-2021
Experimental observation of spatial polarisation separation by absorptive self-focussing
Publisher: Elsevier BV
Date: 07-1991
Sensing and control in dual-recycling laser interferometer gravitational-wave detectors
Publisher: The Optical Society
Date: 03-2003
DOI: 10.1364/AO.42.001244
Abstract: We introduce length-sensing and control schemes for the dual-recycled cavity-enhanced Michelson interferometer configuration proposed for the Advanced Laser Interferometer Gravitational Wave Observatory (LIGO). We discuss the principles of this scheme and show methods that allow sensing and control signals to be derived. Experimental verification was carried out in three benchtop experiments that are introduced. We present the implications of the results from these experiments for Advanced LIGO and other future interferometric gravitational-wave detectors.
A gravitational-wave standard siren measurement of the Hubble constant
Publisher: Springer Science and Business Media LLC
Date: 16-10-2017
DOI: 10.1038/NATURE24471
Abstract: On 17 August 2017, the Advanced LIGO and Virgo detectors observed the gravitational-wave event GW170817-a strong signal from the merger of a binary neutron-star system. Less than two seconds after the merger, a γ-ray burst (GRB 170817A) was detected within a region of the sky consistent with the LIGO-Virgo-derived location of the gravitational-wave source. This sky region was subsequently observed by optical astronomy facilities, resulting in the identification of an optical transient signal within about ten arcseconds of the galaxy NGC 4993. This detection of GW170817 in both gravitational waves and electromagnetic waves represents the first 'multi-messenger' astronomical observation. Such observations enable GW170817 to be used as a 'standard siren' (meaning that the absolute distance to the source can be determined directly from the gravitational-wave measurements) to measure the Hubble constant. This quantity represents the local expansion rate of the Universe, sets the overall scale of the Universe and is of fundamental importance to cosmology. Here we report a measurement of the Hubble constant that combines the distance to the source inferred purely from the gravitational-wave signal with the recession velocity inferred from measurements of the redshift using the electromagnetic data. In contrast to previous measurements, ours does not require the use of a cosmic 'distance ladder': the gravitational-wave analysis can be used to estimate the luminosity distance out to cosmological scales directly, without the use of intermediate astronomical distance measurements. We determine the Hubble constant to be about 70 kilometres per second per megaparsec. This value is consistent with existing measurements, while being completely independent of them. Additional standard siren measurements from future gravitational-wave sources will enable the Hubble constant to be constrained to high precision.
Search for gravitational-wave transients associated with magnetar bursts in Advanced LIGO and Advanced Virgo data from the third observing run
Publisher: arXiv
Date: 2022
Search of the early O3 LIGO data for continuous gravitational waves from the Cassiopeia A and Vela Jr. supernova remnants
Publisher: American Physical Society (APS)
Date: 28-04-2022
External phase–modulation interferometry
Publisher: The Optical Society
Date: 04-1996
DOI: 10.1364/AO.35.001623
Search for gravitational waves from Scorpius X-1 with a hidden Markov model in O3 LIGO data
Publisher: American Physical Society (APS)
Date: 21-09-2022
A Stabilized Fiber Laser for Low Frequency, High Resolution Sensing
Publisher: OSA
Date: 2009
Spectral line removal in the LIGO Data Analysis System (LDAS)
Publisher: IOP Publishing
Date: 11-08-2003
Frequency dependence of thermal noise in gram-scale cantilever flexures
Publisher: American Physical Society (APS)
Date: 15-12-2015
Quantum-noise-limited interferometric phase measurements
Publisher: The Optical Society
Date: 07-1993
DOI: 10.1364/AO.32.003481
Tip-tilt mirror suspension: Beam steering for advanced laser interferometer gravitational wave observatory sensing and control signals
Publisher: AIP Publishing
Date: 12-2011
DOI: 10.1063/1.3669532
Abstract: We describe the design of a small optic suspension system, referred to as the tip-tilt mirror suspension, used to isolate selected small optics for the interferometer sensing and control beams in the advanced LIGO gravitational wave detectors. The suspended optics are isolated in all 6 degrees of freedom, with eigenmode frequencies between 1.3 Hz and 10 Hz. The suspended optic has voice-coil actuators which provide an angular range of ±4 mrad in the pitch and yaw degrees of freedom.
A passive frequency noise insensitive fiber strain sensor using post processing
Publisher: SPIE
Date: 17-10-2012
DOI: 10.1117/12.968204
A cryogenic silicon interferometer for gravitational-wave detection
Publisher: IOP Publishing
Date: 29-07-2020
A 100 km ultra-high performance fiber sensing system
Publisher: IEEE
Date: 05-2007
Multiplexed fiber optic sensor array for geophysical survey
Publisher: SPIE
Date: 14-04-2008
DOI: 10.1117/12.785970
Experimental demonstration of variable-reflectivity signal recycling for interferometric gravitational-wave detectors
Publisher: The Optical Society
Date: 09-2002
DOI: 10.1364/OL.27.001507
Abstract: The results of an experimental demonstration of a benchtop Michelson interferometer with a variable-reflectivity signal mirror are presented. This variable reflectivity is achieved by employment of a second Michelson interferometer. The results are presented in the form of the frequency responses obtained from this configuration with a signal laser injection method. It is shown that the frequency response can be dynamically tuned with independent peak frequency and bandwidth control. Such a configuration gives a tunable frequency response and has an application as a flexible gravitational-wave detector.
Detector description and performance for the first coincidence observations between LIGO and GEO
Publisher: Elsevier BV
Date: 2004
Second-generation laser interferometry for gravitational wave detection: ACIGA progress
Publisher: IOP Publishing
Date: 20-09-2001
First joint observation by the underground gravitational-wave detector KAGRA with GEO 600
Publisher: Oxford University Press (OUP)
Date: 30-04-2022
DOI: 10.1093/PTEP/PTAC073
Abstract: We report the results of the first joint observation of the KAGRA detector with GEO 600. KAGRA is a cryogenic and underground gravitational-wave detector consisting of a laser interferometer with 3 km arms, located in Kamioka, Gifu, Japan. GEO 600 is a British–German laser interferometer with 600 m arms, located near Hannover, Germany. GEO 600 and KAGRA performed a joint observing run from April 7 to 20, 2020. We present the results of the joint analysis of the GEO–KAGRA data for transient gravitational-wave signals, including the coalescence of neutron-star binaries and generic unmodeled transients. We also perform dedicated searches for binary coalescence signals and generic transients associated with gamma-ray burst events observed during the joint run. No gravitational-wave events were identified. We evaluate the minimum detectable litude for various types of transient signals and the spacetime volume for which the network is sensitive to binary neutron-star coalescences. We also place lower limits on the distances to the gamma-ray bursts analyzed based on the non-detection of an associated gravitational-wave signal for several signal models, including binary coalescences. These analyses demonstrate the feasibility and utility of KAGRA as a member of the global gravitational-wave detector network.
First all-sky upper limits from LIGO on the strength of periodic gravitational waves using the Hough transform
Publisher: American Physical Society (APS)
Date: 28-11-2005
Rayleigh backscatter mitigation by RF modulation in a 100 km remote fiber sensing system
Publisher: SPIE
Date: 27-04-2007
DOI: 10.1117/12.721632
Simple analytic approximation to continuous-wave on-resonance beam reshaping
Publisher: The Optical Society
Date: 02-1986
TorPeDO: A Low Frequency Gravitational Force Sensor
Publisher: IOP Publishing
Date: 05-2016
Feedback control of the intensity-noise of injection locked lasers
Publisher: Elsevier BV
Date: 1998
Squeezed-state generation in a spatially varying field mode without adiabatic elimination
Publisher: American Physical Society (APS)
Date: 05-1990
Technical limitations to homodyne detection at audio frequencies
Publisher: The Optical Society
Date: 18-05-2007
DOI: 10.1364/AO.46.003389
Abstract: Homodyne detection relies on the beat between a relatively strong local oscillator (LO) field at the carrier frequency and a signal beam with sidebands centered around the carrier frequency. This type of signal detection, or signal readout, is widely used in quantum optics applications and is expected to be used in advanced interferometric gravitational wave detectors. We investigate experimentally the limitations to making such measurements in a laboratory environment at audio frequencies. We find that beam jitter noise, electronic noise of the photodetectors, and the LO intensity noise can limit the homodyne detection in this frequency band, and we discuss potential solutions.
Experimental demonstration of impedance match locking and control for coupled resonators
Publisher: The Optical Society
Date: 20-04-2010
DOI: 10.1364/OE.18.009314
Intensity-noise properties of injection-locked lasers
Publisher: American Physical Society (APS)
Date: 11-1996
A new topology for the control of complex interferometers
Publisher: IOP Publishing
Date: 29-03-2006
Squeezed state generation for interferometric gravitational-wave detection
Publisher: IOP Publishing
Date: 29-03-2006
Dual recycling laser interferometer gravitational wave detectors: Simulating the performance with imperfect mirrors
Publisher: IOP Publishing
Date: 07-1995
Tests of general relativity with binary black holes from the second LIGO-Virgo gravitational-wave transient catalog
Publisher: American Physical Society (APS)
Date: 15-06-2021
Intensity feedback effects on quantum-limited noise
Publisher: The Optical Society
Date: 10-1995
Pulsed Reset Protocol for Fixed-Frequency Superconducting Qubits
Publisher: American Physical Society (APS)
Date: 10-10-2018
Cloud Security
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 09-2016
DOI: 10.1109/MCC.2016.117
Upper limits on the isotropic gravitational-wave background from Advanced LIGO and Advanced Virgo’s third observing run
Publisher: American Physical Society (APS)
Date: 23-07-2021
Search for anisotropic gravitational-wave backgrounds using data from Advanced LIGO and Advanced Virgo’s first three observing runs
Publisher: American Physical Society (APS)
Date: 27-07-2021
Constraints on dark photon dark matter using data from LIGO’s and Virgo’s third observing run
Publisher: American Physical Society (APS)
Date: 31-03-2022
All-sky search for gravitational wave emission from scalar boson clouds around spinning black holes in LIGO O3 data
Publisher: American Physical Society (APS)
Date: 09-05-2022
Venom from Anemesia species of spider modulates high voltage-activated Ca2+ currents from rat cultured sensory neurones and excitatory post synaptic currents from rat hippocampal slices
Publisher: Elsevier BV
Date: 09-2001
ERRATUM: “BEATING THE SPIN-DOWN LIMIT ON GRAVITATIONAL WAVE EMISSION FROM THE CRAB PULSAR” (2008, ApJ, 683, L45)
Publisher: American Astronomical Society
Date: 06-11-2009
Experimental demonstration of resonant sideband extraction in a sagnac interferometer
Publisher: The Optical Society
Date: 12-1998
DOI: 10.1364/AO.37.007995
Abstract: Sagnac interferometers have recently been proposed as a potential alternative to Michelson interferometers for the purpose of large-scale laser interferometric gravitational-wave detectors. We report on an experimental investigation of the Sagnac interferometer in two configurations: with arm cavities, and with resonant sideband extraction. Resonant sideband extraction was shown to increase the signal bandwidth by a factor of 6.5 compared with the arm cavity device, corresponding to an increase in sensitivity of as much as 6 dB for signals outside the arm cavity bandwidth. Moreover, we compare the performance of a Sagnac interferometer with resonant sideband extraction to a Michelson interferometer with resonant sideband extraction.
Optically targeted search for gravitational waves emitted by core-collapse supernovae during the first and second observing runs of advanced LIGO and advanced Virgo
Publisher: American Physical Society (APS)
Date: 02-04-2020
Results Summary, Recommendations and Future Work
Publisher: Springer International Publishing
Date: 2015
Atoms optics with standing waves of light
Publisher: Springer Berlin Heidelberg
Date: 1994
Backscattered-Light Impact in a Squeezing-Enhanced Gravitational-Wave Detector
Publisher: Springer International Publishing
Date: 2015
Search for gravitational-wave bursts in LIGO data from the fourth science run
Publisher: IOP Publishing
Date: 24-10-2007
Phase-sensitive reflection technique for characterization of a fabry-perot interferometer
Publisher: The Optical Society
Date: 20-07-2000
DOI: 10.1364/AO.39.003638
Abstract: Using a radio frequency coherent modulation and demodulation technique, we explicitly measure both the litude and the phase response of Fabry-Perot interferometers in reflection. This allows us to differentiate clearly between overcoupled and undercoupled cavities and allows a detailed measurement of the full width at half-maximum, the free spectral range, and the finesse of the cavities.
GW190521: A Binary Black Hole Merger with a Total Mass of
150 <
Publisher: American Physical Society (APS)
Date: 02-09-2020
Quasi-static fiber strain sensing with absolute frequency referencing
Publisher: SPIE
Date: 14-04-2008
DOI: 10.1117/12.785956
GWTC-2: Compact Binary Coalescences Observed by LIGO and Virgo during the First Half of the Third Observing Run
Publisher: American Physical Society (APS)
Date: 09-06-2021
Analysis of light noise sources in a recycled michelson interferometer with fabry-Perot arms
Publisher: The Optical Society
Date: 2000
Abstract: We present a method by which the effect of laser field variations on the signal output of an interferometric gravitational wave detector is rigorously determined. Using the Laser Interferometer Gravitational Wave Observatory (LIGO) optical configuration of a power recycled Michelson interferometer with Fabry-Perot arm cavities as an ex le, we calculate the excess noise after the input filter cavity (mode cleaner) and the dependence of the detector strain sensitivity on laser frequency and litude noise, radio frequency oscillator noise, and scattered-light phase noise. We find that noise on the radio frequency sidebands generally limits the detector's sensitivity.
Optomechanical design and construction of a vacuum-compatible optical parametric oscillator for generation of squeezed light
Publisher: AIP Publishing
Date: 06-2016
DOI: 10.1063/1.4953326
Abstract: With the recent detection of gravitational waves, non-classical light sources are likely to become an essential element of future detectors engaged in gravitational wave astronomy and cosmology. Operating a squeezed light source under high vacuum has the advantages of reducing optical losses and phase noise compared to techniques where the squeezed light is introduced from outside the vacuum. This will ultimately provide enhanced sensitivity for modern interferometric gravitational wave detectors that will soon become limited by quantum noise across much of the detection bandwidth. Here we describe the optomechanical design choices and construction techniques of a near monolithic glass optical parametric oscillator that has been operated under a vacuum of 10−6 mbar. The optical parametric oscillator described here has been shown to produce 8.6 dB of quadrature squeezed light in the audio frequency band down to 10 Hz. This performance has been maintained for periods of around an hour and the system has been under vacuum continuously for several months without a degradation of this performance.
Quantum Enhancement of a 4 km Laser Interferometer Gravitational-Wave Detector Introduction
Publisher: Springer International Publishing
Date: 2015
Generation of a phase-flipped Gaussian mode for optical measurements
Publisher: IOP Publishing
Date: 23-05-2002
Gravitational Waves and the Quest for Their Direct Detection
Publisher: Springer International Publishing
Date: 2015
Upper limits on the strength of periodic gravitational waves from PSR J1939+2134
Publisher: IOP Publishing
Date: 09-02-2004
Design and prototype of a device to engage cognitively disabled older adults in visual artwork
Publisher: ACM
Date: 09-06-2009
An investigation of doubly-resonant optical parametric oscillators and nonlinear crystals for squeezing
Publisher: IOP Publishing
Date: 16-12-2010
Automatic mode-matching of a Fabry-Perot cavity with a single photodiode and spatial light modulation
Publisher: IOP Publishing
Date: 23-09-2020
Laser frequency-noise-limited ultrahigh resolution remote fiber sensing
Publisher: The Optical Society
Date: 2006
DOI: 10.1364/OE.14.004617
Abstract: When a fiber Fabry-Perot is used in an ultra-sensitive strain detection system via a radio-frequency interrogation scheme, its frequency discrimination properties can be enhanced by reducing the linewidth of its resonance. This increases the signal-to-noise ratio, and thus suppresses the strain equivalent noise floor. We demonstrate this improvement in a long-distance high performance remote sensing system and show that in reflection, it can mitigate the effects of random phase noise introduced by Rayleigh back-scattering. In transmission, it improves the remote system sensitivity to sub-picostrain resolution, which surpasses any other long-distance remote sensing system to date. With the reduced fiber Fabry-Perot linewidth, all noise sources in the delivery fiber become irrelevant, as the transmission system is limited only by the pre-stabilized laser frequency noise.
An analysis of short put strategies and their role in asset allocation
Publisher: Informa UK Limited
Date: 03-07-2018
Status of the Australian Consortium for Interferometric Gravitational Astronomy
Publisher: IOP Publishing
Date: 24-03-2006
All-sky search for short gravitational-wave bursts in the second Advanced LIGO and Advanced Virgo run
Publisher: American Physical Society (APS)
Date: 11-07-2019
Experiments and theory of laser noise: Consequences for squeezing and injection locking
Publisher: SPIE
Date: 06-05-1996
DOI: 10.1117/12.239824
Search for gravitational waves from binary black hole inspirals in LIGO data
Publisher: American Physical Society (APS)
Date: 07-03-2006
Quantum squeezed light in gravitational-wave detectors
Publisher: IOP Publishing
Date: 05-09-2014
Quantum metrology for gravitational wave astronomy
Publisher: Springer Science and Business Media LLC
Date: 16-11-2010
DOI: 10.1038/NCOMMS1122
Abstract: Einstein's general theory of relativity predicts that accelerating mass distributions produce gravitational radiation, analogous to electromagnetic radiation from accelerating charges. These gravitational waves (GWs) have not been directly detected to date, but are expected to open a new window to the Universe once the detectors, kilometre-scale laser interferometers measuring the distance between quasi-free-falling mirrors, have achieved adequate sensitivity. Recent advances in quantum metrology may now contribute to provide the required sensitivity boost. The so-called squeezed light is able to quantum entangle the high-power laser fields in the interferometer arms, and could have a key role in the realization of GW astronomy.
Narrowband searches for continuous and long-duration transient gravitational waves from known pulsars in the LIGO-Virgo third observing run
Publisher: arXiv
Date: 2021
Backscatter immune Mach-Zehnder-Sagnac hybrid interferometric sensor
Publisher: SPIE
Date: 07-11-2020
DOI: 10.1117/12.785949
Search for Subsolar-Mass Binaries in the First Half of Advanced LIGO’s and Advanced Virgo’s Third Observing Run
Publisher: American Physical Society (APS)
Date: 05-08-2022
Improving astrophysical parameter estimation via offline noise subtraction for Advanced LIGO
Publisher: American Physical Society (APS)
Date: 20-02-2019
Squeezing-Enhancement of a 4 km LIGO Gravitational-Wave Detector
Publisher: Springer International Publishing
Date: 2015
Backscatter Tolerance of a Travelling-Wave Optical Parametric Oscillator
Publisher: Springer International Publishing
Date: 2015
Overview of the LIGO Squeezed Light Injection Experiment
Publisher: Springer International Publishing
Date: 2015
Observation of Squeezed Light in the 2 μ m Region
Publisher: American Physical Society (APS)
Date: 17-05-2018
Squeezed State Generation for Gravitational-Wave Detection
Publisher: Springer International Publishing
Date: 2015
The Doubly Resonant, Travelling-Wave Squeezed Light Source
Publisher: Springer International Publishing
Date: 2015
Nonlinear phase matching locking via optical readout
Publisher: The Optical Society
Date: 2006
DOI: 10.1364/OE.14.011256
Abstract: For optimal Chi((2)) nonlinear interaction the phase matching condition must be satisfied. For type I and type II phase matched materials, this is generally achieved by controlling the temperature of the nonlinear media. We describe a technique to readout the phase-matching condition interferometrically, and experimentally demonstrate feedback control in a degenerate optical parametric lifier (OPA) which is resonant at both the fundamental and harmonic frequencies. The interferometric readout technique is based on using the cavity resonances at the fundamental and harmonic frequencies to enable the readout of the phase mismatch. We achieve relatively fast temperature feedback using the photothermal effect, by modulating the litude of the OPA pump beam.
Quantum Optics and Light
Publisher: Springer International Publishing
Date: 2015
Path length modulation technique for scatter noise immunity in squeezing measurements
Publisher: The Optical Society
Date: 24-07-2022
DOI: 10.1364/OL.38.002265
Dissipation by thermal forces in plasmas
Publisher: Cambridge University Press (CUP)
Date: 02-2009
DOI: 10.1017/S0022377800001422
Abstract: This paper deals with non-isothermal plasmas in which each species is described by Grad's thirteen-moment approximation. A theoretical framework, which includes a generalized Ohm's law and an ambipolar diffusion law, is used to treat energy dissipation resulting from ‘Motional’ interactions between the species. The frictional forces consist of a momentum relaxation force together with a ‘thermal force’ that occurs, in the presence of heat flow, partly because of the dependence of the collision frequencies on temperature. Detailed results are obtained for binary plasmas and for partially and fully ionized ternary plasmas. Our formalism is then compared with the technique used by Demetriades & Argyropoulos to study dissipation in thirteen-moment plasmas. The effects of thermal forces are illustrated by considering situations in which the drift contribution to the electronic relative thermal flux vector predominates over the thermal flux vector itself. Then, for binary plasmas and for ternary plasmas that are not too lightly ionized, the thermal forces increase the resistivity by a factor of about 5/2.
Quantum Noise in Gravitational-Wave Detectors and Applied Squeezed States
Publisher: Springer International Publishing
Date: 2015
A power recycled Michelson interferometer with resonant sideband extraction
Publisher: AIP
Date: 2000
DOI: 10.1063/1.1291856
Picometer level displacement metrology with digitally enhanced heterodyne interferometry
Publisher: The Optical Society
Date: 09-01-2009
DOI: 10.1364/OE.17.000828
Abstract: Digitally enhanced heterodyne interferometry is a laser metrology technique employing pseudo-random codes phase modulated onto an optical carrier. We present the first characterization of the technique's displacement sensitivity. The displacement of an optical cavity was measured using digitally enhanced heterodyne interferometry and compared to a simultaneous readout based on conventional Pound-Drever-Hall locking. The techniques agreed to within 5 pm/ radicalHz at 1 Hz, providing an upper bound to the displacement noise of digitally enhanced heterodyne interferometry. These measurements employed a real-time signal extraction system implemented on a field programmable gate array, suitable for closed-loop control applications. We discuss the applicability of digitally enhanced heterodyne interferometry for lock acquisition of advanced gravitational wave detectors.
Network sensitivity to geographical configuration
Publisher: IOP Publishing
Date: 13-03-2002
Limits on Gravitational-Wave Emission from Selected Pulsars Using LIGO Data
Publisher: American Physical Society (APS)
Date: 12-05-2005
Non-classical Sources of Light and Their Applications to Gravitational Wave Detection
Publisher: OSA
Date: 2017
GW190425: Observation of a Compact Binary Coalescence with Total Mass ∼ 3.4 M⊙
Publisher: American Astronomical Society
Date: 19-03-2020
Abstract: On 2019 April 25, the LIGO Livingston detector observed a compact binary coalescence with signal-to-noise ratio 12.9. The Virgo detector was also taking data that did not contribute to detection due to a low signal-to-noise ratio, but were used for subsequent parameter estimation. The 90% credible intervals for the component masses range from to ( – if we restrict the dimensionless component spin magnitudes to be smaller than 0.05). These mass parameters are consistent with the in idual binary components being neutron stars. However, both the source-frame chirp mass and the total mass of this system are significantly larger than those of any other known binary neutron star (BNS) system. The possibility that one or both binary components of the system are black holes cannot be ruled out from gravitational-wave data. We discuss possible origins of the system based on its inconsistency with the known Galactic BNS population. Under the assumption that the signal was produced by a BNS coalescence, the local rate of neutron star mergers is updated to 250–2810 .
Simulating the performance of Michelson- and Sagnac-based laser interferometric gravitational wave detectors in the presence of mirror tilt and curvature errors
Publisher: Springer Science and Business Media LLC
Date: 07-1998
Search for the isotropic stochastic background using data from Advanced LIGO’s second observing run
Publisher: American Physical Society (APS)
Date: 04-09-2019
Control and tuning of a suspended Fabry-Perot cavity using digitally enhanced heterodyne interferometry
Publisher: The Optical Society
Date: 28-11-2012
DOI: 10.1364/OL.37.004952
Narrowband Searches for Continuous and Long-duration Transient Gravitational Waves from Known Pulsars in the LIGO-Virgo Third Observing Run
Publisher: American Astronomical Society
Date: 06-2022
Abstract: Isolated neutron stars that are asymmetric with respect to their spin axis are possible sources of detectable continuous gravitational waves. This paper presents a fully coherent search for such signals from eighteen pulsars in data from LIGO and Virgo’s third observing run (O3). For known pulsars, efficient and sensitive matched-filter searches can be carried out if one assumes the gravitational radiation is phase-locked to the electromagnetic emission. In the search presented here, we relax this assumption and allow both the frequency and the time derivative of the frequency of the gravitational waves to vary in a small range around those inferred from electromagnetic observations. We find no evidence for continuous gravitational waves, and set upper limits on the strain litude for each target. These limits are more constraining for seven of the targets than the spin-down limit defined by ascribing all rotational energy loss to gravitational radiation. In an additional search, we look in O3 data for long-duration (hours–months) transient gravitational waves in the aftermath of pulsar glitches for six targets with a total of nine glitches. We report two marginal outliers from this search, but find no clear evidence for such emission either. The resulting duration-dependent strain upper limits do not surpass indirect energy constraints for any of these targets.
Squeezed vacuum phase control at 2 μm
Publisher: The Optical Society
Date: 11-2019
DOI: 10.1364/OL.44.005386
Using a passive fiber ring cavity to generate shot-noise-limited laser light for low-power quantum optics applications
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 07-2007
Search for intermediate mass black hole binaries in the first and second observing runs of the Advanced LIGO and Virgo network
Publisher: American Physical Society (APS)
Date: 30-09-2019
Noise Characterization for Laser Interferometer Gravitational Wave Detectors
Publisher: Springer Science and Business Media LLC
Date: 03-2000
Searches for Gravitational Waves from Known Pulsars at Two Harmonics in the Second and Third LIGO-Virgo Observing Runs
Publisher: American Astronomical Society
Date: 08-2022
Abstract: We present a targeted search for continuous gravitational waves (GWs) from 236 pulsars using data from the third observing run of LIGO and Virgo (O3) combined with data from the second observing run (O2). Searches were for emission from the l = m = 2 mass quadrupole mode with a frequency at only twice the pulsar rotation frequency (single harmonic) and the l = 2, m = 1, 2 modes with a frequency of both once and twice the rotation frequency (dual harmonic). No evidence of GWs was found, so we present 95% credible upper limits on the strain litudes h 0 for the single-harmonic search along with limits on the pulsars’ mass quadrupole moments Q 22 and ellipticities ε . Of the pulsars studied, 23 have strain litudes that are lower than the limits calculated from their electromagnetically measured spin-down rates. These pulsars include the millisecond pulsars J0437−4715 and J0711−6830, which have spin-down ratios of 0.87 and 0.57, respectively. For nine pulsars, their spin-down limits have been surpassed for the first time. For the Crab and Vela pulsars, our limits are factors of ∼100 and ∼20 more constraining than their spin-down limits, respectively. For the dual-harmonic searches, new limits are placed on the strain litudes C 21 and C 22 . For 23 pulsars, we also present limits on the emission litude assuming dipole radiation as predicted by Brans-Dicke theory.
Laser frequency stabilization by locking to a LISA arm
Publisher: Elsevier BV
Date: 12-2003
Quantum noise locking
Publisher: IOP Publishing
Date: 26-09-2005
High-bandwidth laser frequency stabilization to a fiber-optic delay line
Publisher: The Optical Society
Date: 20-11-2006
DOI: 10.1364/AO.45.008491
Abstract: Stabilization of laser frequency to interferometers with a large time delay in one arm is of significant interest to space-based gravitational wave detectors such as the Laser Interferometer Space Antenna. A recently proposed technique allows a control bandwidth larger than the inverse delay time to be achieved. We present experimental results demonstrating laser frequency stabilization to an optical fiber delay line. A control bandwidth approximately 50 times the inverse delay time is demonstrated.
Cavity-enhanced spectroscopy using pump-probe differencing
Publisher: IEEE
Date: 2005
Experimental test of modular noise propagation theory for quantum optics
Publisher: American Physical Society (APS)
Date: 10-1996
Ultra-high resolution strain sensing by phase-sensitive interrogation of a passive fiber Bragg resonator
Publisher: SPIE
Date: 11-02-2005
DOI: 10.1117/12.623272
Searches for Gravitational Waves from Known Pulsars at Two Harmonics in the Second and Third LIGO-Virgo Observing Runs
Publisher: arXiv
Date: 2021
Quantum correlations between light and the kilogram-mass mirrors of LIGO
Publisher: Springer Science and Business Media LLC
Date: 07-2020
Coating-free mirrors for high precision interferometric experiments
Publisher: American Physical Society (APS)
Date: 08-11-2007
GW190412: Observation of a binary-black-hole coalescence with asymmetric masses
Publisher: American Physical Society (APS)
Date: 24-08-2020
Cooling of a Gram-Scale Cantilever Flexure to 70 mK with a Servo-Modified Optical Spring
Publisher: American Physical Society (APS)
Date: 08-01-2008
Alignment locking to suspended Fabry-Perot cavity
Publisher: Springer Science and Business Media LLC
Date: 09-2005
Matched template analysis of continuous wave laser for space debris ranging application
Publisher: Elsevier BV
Date: 10-2022
Weak-light phase tracking with a low cycle slip rate
Publisher: The Optical Society
Date: 02-09-2014
DOI: 10.1364/OL.39.005251
Gate-Efficient Simulation of Molecular Eigenstates on a Quantum Computer
Publisher: American Physical Society (APS)
Date: 30-04-2019
First Search for Gravitational Waves from Known Pulsars with Advanced LIGO
Publisher: American Astronomical Society
Date: 07-04-2017
Publisher’s Note: First cross-correlation analysis of interferometric and resonant-bar gravitational-wave data for stochastic backgrounds [Phys. Rev. D76, 022001 (2007)]
Publisher: American Physical Society (APS)
Date: 10-03-2008
Analysis of first LIGO science data for stochastic gravitational waves
Publisher: American Physical Society (APS)
Date: 06-2004
Publisher’s Note: Upper limits on gravitational wave emission from 78 radio pulsars [Phys. Rev. D76, 042001 (2007)]
Publisher: American Physical Society (APS)
Date: 10-03-2008
Publisher’s Note: All-sky search for periodic gravitational waves in LIGO S4 data [Phys. Rev. D77, 022001 (2008)]
Publisher: American Physical Society (APS)
Date: 10-03-2008
Publisher’s Note: Upper limit map of a background of gravitational waves [Phys. Rev. D76, 082003 (2007)]
Publisher: American Physical Society (APS)
Date: 10-03-2008
Quantum optics experiments with atoms
Publisher: IOP Publishing
Date: 1992
Towards solid-state beam steering using a 7-emitter 1550 nm optical phased array
Publisher: SPIE
Date: 04-03-2019
DOI: 10.1117/12.2508951
Prospects for observing and localizing gravitational-wave transients with Advanced LIGO, Advanced Virgo and KAGRA
Publisher: Springer Science and Business Media LLC
Date: 26-04-2018
DOI: 10.1007/S41114-018-0012-9
Abstract: We present possible observing scenarios for the Advanced LIGO, Advanced Virgo and KAGRA gravitational-wave detectors over the next decade, with the intention of providing information to the astronomy community to facilitate planning for multi-messenger astronomy with gravitational waves. We estimate the sensitivity of the network to transient gravitational-wave signals, and study the capability of the network to determine the sky location of the source. We report our findings for gravitational-wave transients, with particular focus on gravitational-wave signals from the inspiral of binary neutron star systems, which are the most promising targets for multi-messenger astronomy. The ability to localize the sources of the detected signals depends on the geographical distribution of the detectors and their relative sensitivity, and $$90\\%$$ 90 % credible regions can be as large as thousands of square degrees when only two sensitive detectors are operational. Determining the sky position of a significant fraction of detected signals to areas of 5– $$20~\\mathrm {deg}^2$$ 20 deg 2 requires at least three detectors of sensitivity within a factor of $$\\sim 2$$ ∼ 2 of each other and with a broad frequency bandwidth. When all detectors, including KAGRA and the third LIGO detector in India, reach design sensitivity, a significant fraction of gravitational-wave signals will be localized to a few square degrees by gravitational-wave observations alone.
Nondegenerate internal squeezing: An all-optical, loss-resistant quantum technique for gravitational-wave detection
Publisher: American Physical Society (APS)
Date: 05-08-2022
Frequency stability of spatial mode interference (tilt) locking
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 11-2002
Ultra-low phase noise squeezed vacuum source for gravitational wave detectors
Publisher: The Optical Society
Date: 23-06-2016
Coherent beam combining using a 2D internally sensed optical phased array
Publisher: The Optical Society
Date: 22-07-2014
DOI: 10.1364/AO.53.004881
Search for intermediate-mass black hole binaries in the third observing run of Advanced LIGO and Advanced Virgo
Publisher: EDP Sciences
Date: 03-2022
DOI: 10.1051/0004-6361/202141452
Abstract: Intermediate-mass black holes (IMBHs) span the approximate mass range 100−10 5 M ⊙ , between black holes (BHs) that formed by stellar collapse and the supermassive BHs at the centers of galaxies. Mergers of IMBH binaries are the most energetic gravitational-wave sources accessible by the terrestrial detector network. Searches of the first two observing runs of Advanced LIGO and Advanced Virgo did not yield any significant IMBH binary signals. In the third observing run (O3), the increased network sensitivity enabled the detection of GW190521, a signal consistent with a binary merger of mass ∼150 M ⊙ providing direct evidence of IMBH formation. Here, we report on a dedicated search of O3 data for further IMBH binary mergers, combining both modeled (matched filter) and model-independent search methods. We find some marginal candidates, but none are sufficiently significant to indicate detection of further IMBH mergers. We quantify the sensitivity of the in idual search methods and of the combined search using a suite of IMBH binary signals obtained via numerical relativity, including the effects of spins misaligned with the binary orbital axis, and present the resulting upper limits on astrophysical merger rates. Our most stringent limit is for equal mass and aligned spin BH binary of total mass 200 M ⊙ and effective aligned spin 0.8 at 0.056 Gpc −3 yr −1 (90% confidence), a factor of 3.5 more constraining than previous LIGO-Virgo limits. We also update the estimated rate of mergers similar to GW190521 to 0.08 Gpc −3 yr −1 .
Proceedings of the 18th international conference on general relativity and gravitation (GRG18) and 7th Edoardo Amaldi conference on gravitational waves (Amaldi7), Sydney, Australia, July 2007
Publisher: IOP Publishing
Date: 15-05-2008
Understanding and controlling laser intensity noise
Publisher: Springer Science and Business Media LLC
Date: 1999
Fast beam steering and agile wavefront control with an optical phased array
Publisher: SPIE
Date: 30-12-2019
DOI: 10.1117/12.2539892
Gravitational-wave Constraints on the Equatorial Ellipticity of Millisecond Pulsars
Publisher: American Astronomical Society
Date: 10-2020
Abstract: We present a search for continuous gravitational waves from five radio pulsars, comprising three recycled pulsars (PSR J0437−4715, PSR J0711−6830, and PSR J0737−3039A) and two young pulsars: the Crab pulsar (J0534+2200) and the Vela pulsar (J0835−4510). We use data from the third observing run of Advanced LIGO and Virgo combined with data from their first and second observing runs. For the first time, we are able to match (for PSR J0437−4715) or surpass (for PSR J0711−6830) the indirect limits on gravitational-wave emission from recycled pulsars inferred from their observed spin-downs, and constrain their equatorial ellipticities to be less than 10 −8 . For each of the five pulsars, we perform targeted searches that assume a tight coupling between the gravitational-wave and electromagnetic signal phase evolution. We also present constraints on PSR J0711−6830, the Crab pulsar, and the Vela pulsar from a search that relaxes this assumption, allowing the gravitational-wave signal to vary from the electromagnetic expectation within a narrow band of frequencies and frequency derivatives.
A robust single-beam optical trap for a gram-scale mechanical oscillator
Publisher: Springer Science and Business Media LLC
Date: 06-11-2017
DOI: 10.1038/S41598-017-15179-X
Abstract: Precise optical control of microscopic particles has been mastered over the past three decades, with atoms, molecules and nano-particles now routinely trapped and cooled with extraordinary precision, enabling rapid progress in the study of quantum phenomena. Achieving the same level of control over macroscopic objects is expected to bring further advances in precision measurement, quantum information processing and fundamental tests of quantum mechanics. However, cavity optomechanical systems dominated by radiation pressure – so-called ‘optical springs’ – are inherently unstable due to the delayed dynamical response of the cavity. Here we demonstrate a fully stable, single-beam optical trap for a gram-scale mechanical oscillator. The interaction of radiation pressure with thermo-optic feedback generates d ing that exceeds the mechanical loss by four orders of magnitude. The stability of the resultant spring is robust to changes in laser power and detuning, and allows purely passive self-locking of the cavity. Our results open up a new way of trapping and cooling macroscopic objects for optomechanical experiments.
Sensitivity of the Advanced LIGO detectors at the beginning of gravitational wave astronomy (vol 93, 112004, 2016)
Publisher: American Physical Society (APS)
Date: 20-03-2018
Special issue: Fourth Australasian conference on General Relativity and Gravitation
Publisher: Springer Science and Business Media LLC
Date: 09-2005
The development of an upper limb stroke rehabilitation robot: identification of clinical practices and design requirements through a survey of therapists
Publisher: Informa UK Limited
Date: 24-12-2010
DOI: 10.3109/17483107.2010.544370
Abstract: PURPOSE. Timely and adequate rehabilitation after a stroke is crucial to maximising recovery. A way of increasing treatment access could be through robots, which would aid therapists in providing post-stroke rehabilitation. This research sought to discover the needs and preferences of therapists with respect to a robot that focuses on upper limb rehabilitation. Understanding requirements for devices could help to increase integration into clinical practice. METHODS. An international online survey was distributed through professional organisations and e-mail list services to therapists. The survey contained 85 items covering topics such as therapist background and treatment approach, rehabilitation aims and robotic rehabilitation device attributes. RESULTS. Data were analysed for 233 respondents, most of whom were physiotherapists and occupational therapists from Australia, Canada and USA. Top attributes included: facilitating a variety of arm movements, being usable while seated, giving biofeedback to clients, having virtual activities specific to daily living, being useful in-home and having resistance adjustable to client needs. In addition, the device should cost under 6000 USD. CONCLUSIONS. Findings from this survey provide guidance for technology developers regarding therapists' specifications for a robotic device for upper limb rehabilitation. In addition, findings offer a better understanding of how acceptance of such devices may be facilitated.
Long distance, high performance remote strain sensing with a fiber Fabry-Perot by radio-frequency laser modulation
Publisher: SPIE
Date: 05-05-2006
DOI: 10.1117/12.664282
Quasi-static fiber strain sensing with FM spectroscopy
Publisher: IEEE
Date: 05-2008
Using active resonator impedance matching for shot-noise limited, cavity enhanced amplitude modulated laser absorption spectroscopy
Publisher: The Optical Society
Date: 14-05-2008
DOI: 10.1364/OE.16.007726
Abstract: We introduce a closed-loop feedback technique to actively control the coupling condition of an optical cavity, by employing litude modulation of the interrogating laser. We show that active impedance matching of the cavity facilitates optimal shot-noise sensing performance in a cavity enhanced system, while its control error signal can be used for intra-cavity absorption or loss signal extraction. We present the first demonstration of this technique with a fiber ring cavity, and achieved shot-noise limited loss sensitivity. We also briefly discuss further use of impedance matching control as a tool for other applications.
Prevalence of meconium ileus marks the severity of mutations of the Cystic Fibrosis Transmembrane Conductance Regulator (CFTR) gene
Publisher: Elsevier BV
Date: 04-2016
DOI: 10.1038/GIM.2015.79
People, sensors, decisions: Customizable and adaptive technologies for assistance in healthcare
Publisher: Association for Computing Machinery (ACM)
Date: 12-2012
Abstract: The ratio of healthcare professionals to care recipients is dropping at an alarming rate, particularly for the older population. It is estimated that the number of persons with Alzheimer's disease, for ex le, will top 100 million worldwide by the year 2050 [Alzheimer's Disease International 2009]. It will become harder and harder to provide needed health services to this population of older adults. Further, patients are becoming more aware and involved in their own healthcare decisions. This is creating a void in which technology has an increasingly important role to play as a tool to connect providers with recipients. Ex les of interactive technologies range from telecare for remote regions to computer games promoting fitness in the home. Currently, such technologies are developed for specific applications and are difficult to modify to suit in idual user needs. The future potential economic and social impact of technology in the healthcare field therefore lies in our ability to make intelligent devices that are customizable by healthcare professionals and their clients, that are adaptive to users over time, and that generalize across tasks and environments. A wide application area for technology in healthcare is for assistance and monitoring in the home. As the population ages, it becomes increasingly dependent on chronic healthcare, such as assistance for tasks of everyday life (washing, cooking, dressing), medication taking, nutrition, and fitness. This article will present a summary of work over the past decade on the development of intelligent systems that provide assistance to persons with cognitive disabilities. These systems are unique in that they are all built using a common framework, a decision-theoretic model for general-purpose assistance in the home. In this article, we will show how this type of general model can be applied to a range of assistance tasks, including prompting for activities of daily living, assistance for art therapists, and stroke rehabilitation. This model is a Partially Observable Markov Decision Process (POMDP) that can be customized by end-users, that can integrate complex sensor information, and that can adapt over time. These three characteristics of the POMDP model will allow for increasing uptake and long-term efficiency and robustness of technology for assistance.
High power compatible internally sensed optical phased array
Publisher: The Optical Society
Date: 09-06-2016
DOI: 10.1364/OE.24.013467
Searching for a Stochastic Background of Gravitational Waves with the Laser Interferometer Gravitational-Wave Observatory
Publisher: American Astronomical Society
Date: 20-04-2007
DOI: 10.1086/511329
Australia's Role in Gravitational Wave Detection
Publisher: Cambridge University Press (CUP)
Date: 2003
DOI: 10.1071/AS03036
Abstract: An enormous effort is underway worldwide to attempt to detect gravitational waves. If successful, this will open a new frontier in astronomy. An essential portion of this effort is being carried out in Australia by the Australian Consortium for Interferometric Gravitational Astronomy (ACIGA), with research teams working at the Australia National University, University of Western Australia, and University of Adelaide involving scientists and students representing many more institutions and nations. ACIGA is developing ultrastable high-power continuous-wave lasers for the next generation interferometric gravity wave detectors researching the problems associated with high optical power in resonant cavities opening frontiers in advanced interferometry configurations, quantum optics, and signal extraction and is the world's leader in high-performance vibration isolation and suspension design. ACIGA has also been active in theoretical research and modelling of potential astronomical gravitational wave sources, and in developing data analysis detection algorithms. ACIGA has opened a research facility north of Perth, Western Australia, which will be the culmination of these efforts. This paper briefly reviews ACIGA's research activities and the prospects for gravitational wave astronomy in the southern hemisphere.
Analysis of LIGO data for gravitational waves from binary neutron stars
Publisher: American Physical Society (APS)
Date: 02-06-2004
Observation of Gravitational Waves from Two Neutron Star–Black Hole Coalescences
Publisher: American Astronomical Society
Date: 29-06-2021
Abstract: We report the observation of gravitational waves from two compact binary coalescences in LIGO’s and Virgo’s third observing run with properties consistent with neutron star–black hole (NSBH) binaries. The two events are named GW200105_162426 and GW200115_042309, abbreviated as GW200105 and GW200115 the first was observed by LIGO Livingston and Virgo and the second by all three LIGO–Virgo detectors. The source of GW200105 has component masses 8 . 9 − 1 . 5 + 1. 2 and 1. 9 − 0. 2 + 0. 3 M ⊙ , whereas the source of GW200115 has component masses 5. 7 − 2 . 1 + 1. 8 and 1. 5 − 0. 3 + 0. 7 M ⊙ (all measurements quoted at the 90% credible level). The probability that the secondary’s mass is below the maximal mass of a neutron star is 89%–96% and 87%–98%, respectively, for GW200105 and GW200115, with the ranges arising from different astrophysical assumptions. The source luminosity distances are 280 − 110 + 110 and 300 − 100 + 150 Mpc , respectively. The magnitude of the primary spin of GW200105 is less than 0.23 at the 90% credible level, and its orientation is unconstrained. For GW200115, the primary spin has a negative spin projection onto the orbital angular momentum at 88% probability. We are unable to constrain the spin or tidal deformation of the secondary component for either event. We infer an NSBH merger rate density of 45 − 33 + 75 Gpc − 3 yr − 1 when assuming that GW200105 and GW200115 are representative of the NSBH population or 130 − 69 + 112 Gpc − 3 yr − 1 under the assumption of a broader distribution of component masses.
Generation and control of frequency-dependent squeezing via Einstein–Podolsky–Rosen entanglement
Publisher: Springer Science and Business Media LLC
Date: 10-02-2020
Advanced interferometry, quantum optics and optomechanics in gravitational wave detectors
Publisher: Wiley
Date: 14-03-2011
THE AIGO PROJECT
Publisher: World Scientific Pub Co Pte Lt
Date: 09-2011
DOI: 10.1142/S0218271811020226
Abstract: The AIGO project is the proposed southern hemisphere advanced large scale gravitational wave detector. With this southern hemisphere detector, the global array of ground based gravitational wave detectors will be substantially improved. Here we summarize the current plans for the AIGO detector.
Squeezing in the audio gravitational-wave detection band
Publisher: American Physical Society (APS)
Date: 15-10-2004
Demonstration of a passive subpicostrain fiber strain sensor
Publisher: The Optical Society
Date: 08-0008
DOI: 10.1364/OL.30.001923
Abstract: We demonstrate a fiber Fabry-Perot (FFP) sensor that is capable of detecting subpicostrain signals, from 100 Hz and extending beyond 100 kHz, using the Pound-Drever-Hall (PDH) frequency locking technique. A low-power diode laser at 1550 nm is locked to a free-space reference cavity to suppress its free-running frequency noise, thereby stabilizing the laser. The stabilized laser is then used to interrogate a FFP sensor whose PDH error signal yields the instantaneous fiber strain.
All-sky search for gravitational wave emission from scalar boson clouds around spinning black holes in LIGO O3 data
Publisher: arXiv
Date: 2021
Stable transfer of an optical frequency standard via a 4.6 km optical fiber
Publisher: The Optical Society
Date: 26-02-2010
DOI: 10.1364/OE.18.005213
Towards the SQL: Status of the direct thermal-noise measurements at the ANU
Publisher: IOP Publishing
Date: 02-03-2011
Automatic alignment of a rigid spacer cavity
Publisher: Springer Science and Business Media LLC
Date: 09-2005
Gingin High Optical Power Test Facility
Publisher: IOP Publishing
Date: 02-03-2006
All-sky search for short gravitational-wave bursts in the third Advanced LIGO and Advanced Virgo run
Publisher: American Physical Society (APS)
Date: 23-12-2021
Search for gravitational waves from Scorpius X-1 in the second Advanced LIGO observing run with an improved hidden Markov model
Publisher: American Physical Society (APS)
Date: 04-12-2019
Internally sensed optical phased array
Publisher: The Optical Society
Date: 29-03-2013
DOI: 10.1364/OL.38.001137
Tests of general relativity with the binary black hole signals from the LIGO-Virgo catalog GWTC-1
Publisher: American Physical Society (APS)
Date: 20-11-2019
Theoretical and Algorithmic Foundations of Wireless Ad Hoc and Sensor Networks
Publisher: Springer Science and Business Media LLC
Date: 29-09-2010
DOI: 10.1155/2010/313047
Measurable signatures of quantum mechanics in a classical spacetime
Publisher: American Physical Society (APS)
Date: 09-08-2017
Compensation of Strong Thermal Lensing in High-Optical-Power Cavities
Publisher: American Physical Society (APS)
Date: 12-06-2006
Backscatter tolerant squeezed light source for advanced gravitational-wave detectors
Publisher: The Optical Society
Date: 12-2011
DOI: 10.1364/OL.36.004680
SQUEEZED-LIGHT FROM 2ND-HARMONIC GENERATION - EXPERIMENT VERSUS THEORY
Publisher: The Optical Society
Date: 06-1995
DOI: 10.1364/OL.20.001316
Abstract: We report excellent quantitative agreement between theoretical predictions and experimental observation of squeezing from a singly resonant second-harmonic-generating crystal. Limitations in the noise suppression imposed by the pump laser are explicitly modeled and confirmed by our measurements.
A Joint Fermi-GBM and LIGO/Virgo Analysis of Compact Binary Mergers from the First and Second Gravitational-wave Observing Runs
Publisher: American Astronomical Society
Date: 20-04-2020
Constraints on Cosmic Strings Using Data from the Third Advanced LIGO–Virgo Observing Run
Publisher: American Physical Society (APS)
Date: 16-06-2021
Double pass locking and spatial mode locking for gravitational wave detectors
Publisher: IOP Publishing
Date: 19-03-2002
Multiplexed fiber optic acoustic sensors in a 120 km loop using RF modulation
Publisher: SPIE
Date: 26-09-2007
DOI: 10.1117/12.733330
Continuous-wave light detection and ranging (LiDAR) using image-reject homodyne detection and PRBS modulation
Publisher: SPIE
Date: 30-12-2019
DOI: 10.1117/12.2539990
AIGO: a southern hemisphere detector for the worldwide array of ground-based interferometric gravitational wave detectors
Publisher: IOP Publishing
Date: 06-04-2010
A gravitational wave observatory operating beyond the quantum shot-noise limit
Publisher: Springer Science and Business Media LLC
Date: 11-09-2011
DOI: 10.1038/NPHYS2083
Arm-length stabilisation for interferometric gravitational-wave detectors using frequency-doubled auxiliary lasers
Publisher: The Optical Society
Date: 19-12-2012
DOI: 10.1364/OE.20.000081
All-sky search in early O3 LIGO data for continuous gravitational-wave signals from unknown neutron stars in binary systems
Publisher: American Physical Society (APS)
Date: 12-03-2021
Gravitational Waves and Gamma-Rays from a Binary Neutron Star Merger: GW170817 and GRB 170817A
Publisher: American Astronomical Society
Date: 16-10-2017
Approaching the motional ground state of a 10-kg object
Publisher: American Association for the Advancement of Science (AAAS)
Date: 18-06-2021
Abstract: Cooling objects to low temperature can increase the sensitivity of sensors and the operational performance of most devices. Removing most of the thermal vibrations—or phonons—such that the object reaches its motional quantum ground state has been achieved but typically with tiny, nanoscale objects. Using the suspended mirrors of the Laser Interferometer Gravitational-Wave Observatory (LIGO) that form a 10-kg optomechanical oscillator, Whittle et al. demonstrate the ability to cool such a large-scale object to nearly the motional ground state. An upgrade to LIGO with such a modification could increase its sensitivity and range to gravitational waves but also extend studies of quantum mechanics to large-scale objects. Science , abh2634, this issue p. 1333
Model-based cross-correlation search for gravitational waves from the low-mass X-ray binary Scorpius X-1 in LIGO O3 data
Publisher: arXiv
Date: 2022
A Comparison Between Digital and Analog Pound-Drever-Hall Laser Stabilization
Publisher: OSA
Date: 2009
Open data from the first and second observing runs of Advanced LIGO and Advanced Virgo
Publisher: Elsevier BV
Date: 2021
Laser frequency noise immunity in multiplexed displacement sensing
Publisher: The Optical Society
Date: 23-02-2011
DOI: 10.1364/OL.36.000672
Constraints on dark photon dark matter using data from LIGO's and Virgo's third observing run
Publisher: arXiv
Date: 2021
Advanced interferometer configurations
Publisher: SPIE
Date: 21-02-2003
DOI: 10.1117/12.459092
Dissipation by thermal forces in quantum plasmas
Publisher: Cambridge University Press (CUP)
Date: 12-1984
DOI: 10.1017/S0022377800002142
Abstract: This paper deals with degenerate Fermi–Dirac plasmas in which transport is by quasi-particles that form a dilute gas described by the Boltzmann equation. The off-equilibrium part of the distribution function of each species is estimated by expanding it in terms of the fluid velocity of the species, relative to the plasma, and its relative heat flux vector. Expressions for the frictional forces acting between the species, consisting of a relaxation-model force and a thermal force, are obtained. These are used in a plasma dissipation formalism, yielding, for ternary partially ionized plasmas, a generalized Ohm law and an ambipolar diffusion law. The results are applied to neutron star matter, consisting of thermally ultra-relativistic electrons and non-relativistic protons and neutrons, with the mass density dominated by the neutrons. The dissipation formalism is used to obtain an expression for the magnetic force on this material.
Optical cavity enhanced real-time absorption spectroscopy of CO2 using laser amplitude modulation
Publisher: AIP Publishing
Date: 04-08-2014
DOI: 10.1063/1.4892535
Abstract: We present a spectrometer based on the cavity enhanced litude modulated laser absorption spectroscopy (CEAMLAS) technique for measuring molecular gas absorption. This CEAMLAS spectrometer accurately measured a CO2 absorption line at 1572.992 nm with effectively 100% measurement duty cycle. It achieved an absorption sensitivity of 5.2 × 10−9 Hz−1∕2 using a linear Fabry-Perot cavity with a modest finesse of ≈1000. We also used the spectrometer to perform preliminary measurements of the 13C/12C isotopic ratio in CO2, yielding an isotopic signature δ13C of −83±9‰ for our CO2 s le.
Upper limits on gravitational wave bursts in LIGO’s second science run
Publisher: American Physical Society (APS)
Date: 08-09-2005
A simple high-sensitivity interferometric position sensor for test mass control on an advanced LIGO interferometer
Publisher: Springer Science and Business Media LLC
Date: 1999
Interferometric wavefront sensing with a single diode using spatial light modulation
Publisher: The Optical Society
Date: 10-03-2017
DOI: 10.1364/AO.56.002353
Achieving resonance in the Advanced LIGO gravitational-wave interferometer
Publisher: IOP Publishing
Date: 26-11-2014
Search for continuous gravitational wave emission from the Milky Way center in O3 LIGO-Virgo data
Publisher: American Physical Society (APS)
Date: 09-08-2022
Searching for the causes of anomalous Advanced LIGO noise
Publisher: AIP Publishing
Date: 05-2023
DOI: 10.1063/5.0140766
Abstract: Advanced LIGO and Advanced Virgo have detected gravitational waves from astronomical sources to open a new window on the Universe. To explore this new realm requires an exquisite level of detector sensitivity, meaning that the much stronger signal from instrumental and environmental noise must be rejected. Selected ex les of unwanted noise in Advanced LIGO are presented. The initial focus is on how the existence of this noise (characterized by particular frequencies or time intervals) was discovered. Then, a variety of methods are used to track down the source of the noise, e.g., a fault within the instruments or coupling from an external source. The ultimate goal of this effort is to mitigate the noise by either fixing equipment or by augmenting methods to suppress the coupling to the environment.
Optical-fiber accelerometer array: Nano-g infrasonic operation in a passive 100 km loop
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 06-2010
Photothermal effects in passive fiber Bragg grating resonators
Publisher: The Optical Society
Date: 04-2005
DOI: 10.1364/OL.30.000708
Abstract: Photothermal effects in passive Fabry-Perot resonators are caused by the conversion of circulating optical energy into heat as a result of absorption. This results in thermal change in the resonator's optical path length, the round-trip phase, and hence the resonance condition. We describe a simplified dynamic numerical model for photothermal effects in passive fiber Bragg grating resonators and present results of their experimental observation.
Classical and quantum signatures of competing [Formula Presented] nonlinearities
Publisher: American Physical Society (APS)
Date: 06-1997
The atom-cavity system as a generator of quadrature squeezed states
Publisher: Springer Science and Business Media LLC
Date: 09-1992
DOI: 10.1007/BF00325008
Critical coupling control of a microresonator by laser amplitude modulation
Publisher: The Optical Society
Date: 18-05-2012
DOI: 10.1364/OE.20.012622
The torsion pendulum dual oscillator for low-frequency Newtonian noise detection
Publisher: AIP Publishing
Date: 15-05-2023
DOI: 10.1063/5.0145092
Abstract: We present a torsion pendulum dual oscillator sensor designed toward the direct detection of Newtonian noise. We discuss the sensitivity limitations of the system, experimental performance characterization results, and prospectives to improve performance. The sensor is being developed to contribute to the mitigation of Newtonian noise impacts in the sensitivities of next generation terrestrial gravitational-wave detectors.
All-sky, all-frequency directional search for persistent gravitational waves from Advanced LIGO’s and Advanced Virgo’s first three observing runs
Publisher: American Physical Society (APS)
Date: 03-06-2022
Digital laser frequency stabilization using an optical cavity
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 08-2010
Resonant self-induced separation of polarization components: comparison between theory and experiment
Publisher: The Optical Society
Date: 1993
Measurement of the frequency response of a bench-top quantum speed meter interferometer
Publisher: Elsevier BV
Date: 09-2003
Mechanical characterisation of the TorPeDO: A low frequency gravitational force sensor
Publisher: IOP Publishing
Date: 05-06-2017
Laser noise-limited ultra-high performance remote sensing with a fiber-fabry-perot
Publisher: OSA
Date: 2006
QUANTUM SQUEEZING IN ADVANCED GRAVITATIONAL WAVE DETECTORS
Publisher: World Scientific Pub Co Pte Lt
Date: 09-2011
DOI: 10.1142/S0218271811020159
Abstract: Second generation ground-based gravitational wave detectors, scheduled to be operating by the middle of this decade, will be limited in sensitivity over much of their detection range by optical quantum noise. As they will be operating at power levels close to the tolerance of the optical components, significant further improvement in sensitivity will require the use of quantum optical techniques such as the injection of squeezed states. In this paper we briefly review squeezing and plans for its implementation into advanced gravitational wave detectors.
Search for continuous gravitational waves from 20 accreting millisecond x-ray pulsars in O3 LIGO data
Publisher: American Physical Society (APS)
Date: 19-01-2022
Noiseless independent signal and power amplification
Publisher: The Optical Society
Date: 04-1998
DOI: 10.1364/OL.23.000540
Abstract: We present a noiseless optical lifier comprising a signal- lifying feed-forward loop and a power- lifying injection-locked laser. We demonstrate that the signal lifier can attain a signal-transfer coefficient limited solely by the quantum efficiency of our in-loop photodetector and that we can independently lify the optical power while leaving the normalized intensity-noise spectral density of the input field unchanged.
Effects of transients in LIGO suspensions on searches for gravitational waves
Publisher: AIP Publishing
Date: 12-2017
DOI: 10.1063/1.5000264
Abstract: This paper presents an analysis of the transient behavior of the Advanced LIGO (Laser Interferometer Gravitational-wave Observatory) suspensions used to seismically isolate the optics. We have characterized the transients in the longitudinal motion of the quadruple suspensions during Advanced LIGO’s first observing run. Propagation of transients between stages is consistent with modeled transfer functions, such that transient motion originating at the top of the suspension chain is significantly reduced in litude at the test mass. We find that there are transients seen by the longitudinal motion monitors of quadruple suspensions, but they are not significantly correlated with transient motion above the noise floor in the gravitational wave strain data, and therefore do not present a dominant source of background noise in the searches for transient gravitational wave signals. Using the suspension transfer functions, we compared the transients in a week of gravitational wave strain data with transients from a quadruple suspension. Of the strain transients between 10 and 60 Hz, 84% are loud enough that they would have appeared above the sensor noise in the top stage quadruple suspension monitors if they had originated at that stage at the same frequencies. We find no significant temporal correlation with the suspension transients in that stage, so we can rule out suspension motion originating at the top stage as the cause of those transients. However, only 3.2% of the gravitational wave strain transients are loud enough that they would have been seen by the second stage suspension sensors, and none of them are above the sensor noise levels of the penultimate stage. Therefore, we cannot eliminate the possibility of transient noise in the detectors originating in the intermediate stages of the suspension below the sensing noise.
Upper limits on a stochastic background of gravitational waves
Publisher: American Physical Society (APS)
Date: 22-11-2005
Variable focal-length lens for atoms
Publisher: The Optical Society
Date: 02-1996
High-resolution absolute frequency referenced fiber optic sensor for quasi-static strain sensing
Publisher: The Optical Society
Date: 13-07-2010
DOI: 10.1364/AO.49.004029
Ultra-sensitive remote fiber sensing by radio-frequency current modulation of a diode laser
Publisher: OSA
Date: 2005
DOI: 10.1364/OSHS.2005.P4
Noise-cancelled, cavity-enhanced saturation laser spectroscopy for laser frequency stabilisation
Publisher: IOP Publishing
Date: 02-03-2006
Servo-modified optical spring
Publisher: IEEE
Date: 08-2011
Tolerance of dual recycling laser interferometric gravitational wave detectors to mirror tilt and curvature errors
Publisher: American Physical Society (APS)
Date: 15-12-1993
All-sky search for continuous gravitational waves from isolated neutron stars using Advanced LIGO and Advanced Virgo O3 data
Publisher: American Physical Society (APS)
Date: 28-11-2022
The design and construction of a prototype lateral-transfer retro-reflector for inter-satellite laser ranging
Publisher: IOP Publishing
Date: 16-04-2014
First joint observation by the underground gravitational-wave detector, KAGRA, with GEO600
Publisher: arXiv
Date: 2022
Status of ACIGA High Power Test Facility for advanced interferometry
Publisher: SPIE
Date: 29-09-2004
DOI: 10.1117/12.581300
Measurement of Gouy phase evolution by use of spatial mode interference
Publisher: The Optical Society
Date: 15-10-2004
DOI: 10.1364/OL.29.002339
Abstract: An experimental technique to observe and accurately measure the Gouy phase evolution of Hermite-Gaussian modes is presented. Because of the unique features of spatial mode interference frequency-locking error signals, we are able to readily perform explicit measurement of the Gouy phase in a simple and highly accurate manner. We present these data and discuss the technique and its implications.
High dynamic range flexure transfer function measurement
Publisher: IOP Publishing
Date: 15-03-2002
Suppression of classic and quantum radiation pressure noise by electro-optic feedback
Publisher: The Optical Society
Date: 15-02-1999
DOI: 10.1364/OL.24.000259
Abstract: We present theoretical results that demonstrate a new technique that can be used to improve the sensitivity of thermal noise measurements: intracavity intensity stabilization. It is demonstrated that electro-optic feedback can be used to reduce intracavity intensity fluctuations, and the consequent radiation pressure fluctuations, by a factor of 2 below the quantum-noise limit. We show that this reduction is achievable in the presence of large classic intensity fluctuations in the incident laser beam. The benefits of this scheme are a consequence of the sub-Poissonian intensity statistics of the field inside a feedback loop and the quantum nondemolition nature of radiation pressure noise as a readout system for the intracavity intensity fluctuations.
Variable reflectivity signal mirrors and signal response measurements
Publisher: IOP Publishing
Date: 14-03-2002
Improving the robustness of the advanced LIGO detectors to earthquakes
Publisher: IOP Publishing
Date: 05-11-2020
Abstract: Teleseismic, or distant, earthquakes regularly disrupt the operation of ground–based gravitational wave detectors such as Advanced LIGO. Here, we present EQ mode , a new global control scheme, consisting of an automated sequence of optimized control filters that reduces and coordinates the motion of the seismic isolation platforms during earthquakes. This, in turn, suppresses the differential motion of the interferometer arms with respect to one another, resulting in a reduction of DARM signal at frequencies below 100 mHz. Our method greatly improved the interferometers’ capability to remain operational during earthquakes, with ground velocities up to 3.9 μ m s −1 rms in the beam direction, setting a new record for both detectors. This sets a milestone in seismic controls of the Advanced LIGO detectors’ ability to manage high ground motion induced by earthquakes, opening a path for further robust operation in other extreme environmental conditions.
Dynamic photothermal resonance push-pull in a fiber Bragg grating Fabry-Perot
Publisher: IEEE
Date: 2005
Laser frequency noise-limited ultra-sensitive remote fiber strain detection system
Publisher: IEEE
Date: 2006
Sensitivity and performance of the Advanced LIGO detectors in the third observing run
Publisher: American Physical Society (APS)
Date: 11-09-2020
Broadband reduction of quantum radiation pressure noise via squeezed light injection
Publisher: Springer Science and Business Media LLC
Date: 07-10-2020
Practical test mass and suspension configuration for a cryogenic kilohertz gravitational wave detector
Publisher: American Physical Society (APS)
Date: 18-12-2020
Testing the GRACE follow-on triple mirror assembly
Publisher: IOP Publishing
Date: 16-09-2014
Pump–probe differencing technique for cavityenhanced, noise-canceling saturation laser spectroscopy
Publisher: The Optical Society
Date: 15-05-2005
DOI: 10.1364/OL.30.001219
Abstract: We present an experimental technique that permits mechanical-noise-free, cavity-enhanced frequency measurements of an atomic transition and its hyperfine structure. We employ the 532-nm frequency-doubled output from a Nd:YAG laser and an iodine vapor cell. The cell is placed in a folded ring cavity (FRC) with counterpropagating pump and probe beams. The FRC is locked with the Pound-Drever-Hall technique. Mechanical noise is rejected by differencing the pump and probe signals. In addition, this differenced error signal provides a sensitive measure of differential nonlinearity within the FRC.
THE LIGO GRAVITATIONAL WAVE OBSERVATORIES: RECENT RESULTS AND FUTURE PLANS
Publisher: World Scientific Publishing Company
Date: 02-2006
Optimal location of a new interferometric gravitational wave observatory
Publisher: American Physical Society (APS)
Date: 12-06-2006
Pico-strain multiplexed fiber optic sensor array operating down to infra-sonic frequencies
Publisher: The Optical Society
Date: 18-06-2009
DOI: 10.1364/OE.17.011077
Abstract: An integrated sensor system is presented which displays passive long range operation to 100 km at pico-strain (pepsilon) sensitivity to low frequencies (4 Hz) in wavelength ision multiplexed operation with negligible cross-talk (better than -75 dB). This has been achieved by pre-stabilizing and multiplexing all interrogation lasers for the sensor array to a single optical frequency reference. This single frequency reference allows each laser to be locked to an arbitrary wavelength and independently tuned, while maintaining suppression of laser frequency noise. With appropriate packaging, such a multiplexed strain sensing system can form the core of a low frequency accelerometer or hydrophone array.
Laser frequency noise suppression by arm-locking in LISA: progress towards a bench-top demonstration
Publisher: IOP Publishing
Date: 21-04-2005
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