ORCID Profile
0000-0003-4551-9896
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)
Nanotechnology | Nanotechnology | Optical Physics | Optics And Opto-Electronic Physics | Atomic, Molecular, Nuclear, Particle and Plasma Physics | Quantum Physics | Optical Physics Not Elsewhere Classified | Other Electronic Engineering | Quantum Optics And Lasers | Plasmas And Electrical Discharges | Condensed Matter Physics | Powder and Particle Technology | Microelectronics and Integrated Circuits | Composite Materials | Instruments And Techniques | Time-Series Analysis | Integrated Circuits | Invertebrate Biology | Biomedical Engineering Not Elsewhere Classified | Communications Technologies Not Elsewhere Classified | Photonics, Optoelectronics and Optical Communications | Lasers and Quantum Electronics | Classical and Physical Optics | Condensed Matter Physics—Electronic And Magnetic Properties; | Colloid and Surface Chemistry | Optical And Photonic Systems | Environmental Technologies | Electrical and Electronic Engineering | Nanophotonics | Nanoscale Characterisation | Dynamical Systems in Applications | Interdisciplinary Engineering Not Elsewhere Classified | Materials Engineering Not Elsewhere Classified | Surfaces and Structural Properties of Condensed Matter | Electronic and Magnetic Properties of Condensed Matter; Superconductivity | Condensed Matter Imaging | Atomic And Molecular Physics | Condensed Matter Characterisation Technique Development
ANZSRC Socio-Economic Objective (SEO)
Physical sciences | Integrated circuits and devices | Communication equipment not elsewhere classified | Expanding Knowledge in the Physical Sciences | Telecommunications | Combined operations | Natural Fibres, Yarns and Fabrics | Mathematical sciences | Other | Other | Integrated Circuits and Devices | Prevention and treatment of pollution | Other | Polymeric Materials (e.g. Paints) | Metals (composites, coatings, bonding, etc.) | Industrial instrumentation | Computer equipment | Expanding Knowledge in Technology | Scientific instrumentation | Communication services not elsewhere classified | Economic issues not elsewhere classified | Water services and utilities | Expanding Knowledge in Engineering | Expanding Knowledge in the Biological Sciences | Electricity, gas and water services and utilities |
Related Links
Publications
The use of a nearly confocal interferometer for the study of transverse modes of a cavity
Publisher: American Association of Physics Teachers (AAPT)
Date: 03-1991
DOI: 10.1119/1.16828
Abstract: An experiment has been developed that enables students to use a nearly confocal interferometer to measure and verify the predicted frequency spacing of adjacent transverse modes of the nearly confocal interferometer.
Ti:sapphire laser cavity mode and pump-laser mode calculations
Publisher: The Optical Society
Date: 20-06-1994
DOI: 10.1364/AO.33.003849
Chinese workers’ history: passive minds docile bodies
Publisher: Emerald
Date: 11-10-2019
Abstract: This paper aims to describe an exploratory study that has sought to understand how an institutionalised docility rather than resistance has been created in the minds of Chinese workers by the Chinese State. The study proposes that this docility has been crucial in enabling China to become a world leading economic powerhouse. The paper draws on Foucault’s concept of governmentality and uses the genealogical method to examine the historical events that have shaped the mentalities of today’s Chinese workers. Original interviews ( n = 74) with everyday workers across industries and locations illustrate this. It was found that the utilisation of centuries-long Confucian hierarchical rules by successive regimes has created a cumulative effect that has maintained workers docility and their willingness to submit themselves to poor working conditions that – ultimately – benefit the Chinese State and business, though this is at their expense. This finding is in juxtaposition to current research that claim that their working conditions are fostering a rising consciousness and resistance among Chinese workers. This paper provides a novel explanation for why Chinese workers accept their poor working conditions and thus critiques current perspectives about Chinese worker resistance.
Recent advances in UV and VUV cleaning of optical materials
Publisher: IEEE
Date: 2002
Low quantum noise laser diodes using high-finesse-cavities
Publisher: IEEE
Date: 2001
Numerical study of optical feedback coherence in semiconductor laser dynamics
Publisher: The Optical Society
Date: 22-08-2019
DOI: 10.1364/OL.44.004207
Low quantum noise laser diodes
Publisher: Institution of Engineering and Technology (IET)
Date: 12-2001
Observation of Mode-Locked Spatial Laser Solitons
Publisher: American Physical Society (APS)
Date: 27-01-2017
Spatial beam profiles from a laser–diode system with optical feedback
Publisher: The Optical Society
Date: 20-08-2001
DOI: 10.1364/AO.40.004316
Abstract: The output beam profile of a laser diode with weak-to-moderate levels of optical feedback is shown to arise from interference of the emitted and feedback fields. This has been determined from a series of experiments, that measure the output spatial beam profile as the optical feedback field into the laser diode is spatially manipulated. Tilting, focusing, and aperturing the feedback field led to output beam profiles readily interpreted as the interference between the emitted and the feedback fields, provided the output of the laser-diode system with optical feedback has sufficient temporal coherence. Observation of the interference pattern in the spatial beam profile, at an appropriate level of optical feedback, can be used to study the relative wave front of the optical feedback and emitted fields and to estimate coupling coefficients.
UV laser-induced dehydroxylation of UV fused silica surfaces
Publisher: WORLD SCIENTIFIC
Date: 2007
Removal of silica microspheres from glass and silica substrates by dry laser cleaning
Publisher: WORLD SCIENTIFIC
Date: 2006
The effect of pulse shape on 3D modelling of laser cleaning fluences
Publisher: WORLD SCIENTIFIC
Date: 2007
Time-Scale Independent Permutation Entropy of a Photonic Integrated Device
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 2017
Comb generation bandwidth for frequency-shifted feedback semiconductor lasers
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 07-1999
DOI: 10.1109/3.772175
Stability of the nonlinear dynamics of an optically injected VCSEL
Publisher: The Optical Society
Date: 19-04-2012
DOI: 10.1364/OE.20.010256
Laser induced surface optical damage associated with UV laser cleaning of sub-micron contaminant particles from glass surfaces
Publisher: IEEE
Date: 1998
An overview of experimental research into the laser cleaning of contaminants from surfaces
Publisher: WORLD SCIENTIFIC
Date: 2007
Frequency offset locking of a synchronously pumped mode-locked dye laser
Publisher: Elsevier BV
Date: 11-1985
Photoreflectance/scattering measurements of spider silks informed by standard optics
Publisher: The Royal Society
Date: 04-2020
DOI: 10.1098/RSOS.192174
Abstract: The silks of certain orb weaving spiders are emerging as high-quality optical materials. This motivates study of the optical properties of such silk and particularly the comparative optical properties of the silks of different species. Any differences in optical properties may impart biological advantage for a spider species and make the silks interesting for biomimetic prospecting as optical materials. A prior study of the reflectance of spider silks from 18 species reported results for three species of modern orb weaving spiders ( Nephila clavipes, Argiope argentata and Micrathena Schreibersi ) as having reduced reflectance in the UV range. (Modern in the context used here means more recently derived.) The reduced UV reflectance was interpreted as an adaptive advantage in making the silks less visible to insects. Herein, a standard, experimental technique for measuring the reflectance spectrum of diffuse surfaces, using commercially available equipment, has been applied to s les of the silks of four modern species of orb weaving spiders: Phonognatha graeffei , Eriophora transmarina , Nephila plumipes and Argiope keyserlingi . This is a different technique than used in the previous study. Three of the four silks measured have a reduced signal in the UV. By taking the form of the silks as optical elements into account, it is shown that this is attributable to a combination of wavelength-dependent absorption and scattering by the silks rather than differences in reflectance for the different silks. Phonognatha graeffei dragline silk emerges as a very interesting spider silk with a flat ‘reflectance'/scattering spectrum which may indicate it is a low UV absorbing dielectric micro-fibre. Overall the measurement emerges as having the potential to compare the large numbers of silks from different species to prospect for those which have desirable optical properties.
A randomized and controlled study of noninvasive hemodynamic monitoring as a guide to drug treatment of uncontrolled hypertensive patients
Publisher: Ovid Technologies (Wolters Kluwer Health)
Date: 12-2015
Complexity in pulsed nonlinear laser systems interrogated by permutation entropy
Publisher: The Optical Society
Date: 16-07-2014
DOI: 10.1364/OE.22.017840
Enhanced laser cleaning via direct line beam irradiation
Publisher: Springer Science and Business Media LLC
Date: 09-2004
Non-invasive hemodynamic monitoring as a guide to drug treatment of uncontrolled hypertensive patients: effects on home blood pressure in the BEAUTY study
Publisher: Informa UK Limited
Date: 21-08-2018
DOI: 10.1080/08037051.2018.1505425
Abstract: In the BEAUTY study we investigated whether utilizing non-invasive monitoring of hemodynamic parameters combined with a drug selection algorithm (integrated hemodynamic management-IHM) compared to conventional drug selection may improve home BP in patients with uncontrolled hypertension. Uncontrolled (office systolic blood pressure (SBP) > 140 mmHg and ambulatory daytime SBP >135 mmHg while taking ≥2 antihypertensive drugs) essential hypertensive patients were referred to 5 European Hypertension Excellence Centers and, if eligible, were randomized into IHM-guided vs conventional treatment adjustment. Home blood pressure (BP) was taken with 2 repeated readings at 1-2 min intervals in the morning and in the evening (before drug intake and eating) during the week preceding the visit at the outpatient clinic after 5 min rest using a validated semi-automatic oscillometric arm cuff device and with a correct cuff bladder placement. Home blood pressure was measured in a sub-group of patients (n = 84) not significantly different from the other patients. Home SBP changed from 152.1+/-15.8 and 149.8+/-11.8 mmHg to 131.0 +/-11.1 and 139.6+/-12.8 mmHg in IHM group (n = 46) and Control group (n = 38), respectively, showing significantly greater reduction in IHM than in Control group (d= -10.9 mmHg, 95% CI -17.77, -4.02), p = 0.002. The reduction remained significant after multiple adjustments, particularly for baseline home SBP, recruiting center, age, sex and BMI (SBP Drug selection algorithm based on non-invasive hemodynamic monitoring induced larger reduction in home BP compared to conventional drug selection in uncontrolled hypertensive patients referred to European Hypertension Excellence Centers. Although the main BEAUTY study was negative, these home BP measurements taken by patients themselves may suggest that the integrated hemodynamic monitoring is useful in patients with uncontrolled hypertension. This finding might depend on specific features of home BP measurements which could make it recommended BP measurement method for drug trials.
Measuring nanoparticle size using optical surface profilers
Publisher: The Optical Society
Date: 21-06-2013
DOI: 10.1364/OE.21.015664
Calculation of spectral linewidths from measured fringe visibility using a fabry–perot interferometer
Publisher: Informa UK Limited
Date: 11-1988
Automated correlation dimension analysis of optically injected solid state lasers
Publisher: The Optical Society
Date: 23-04-2009
DOI: 10.1364/OE.17.007592
Abstract: Nonlinear lasers are excellent systems from which to obtain high signal-to-noise experimental data of nonlinear dynamical variables to be used to develop and demonstrate robust nonlinear dynamics analysis techniques. Here we investigate the dynamical complexity of such a system: an optically injected Nd:YVO(4) solid state laser. We show that a map of the correlation dimension as a function of the injection strength and frequency detuning, extracted from the laser output power time-series data, is an excellent mirror of the dynamics map generated from a theoretical model of the system. An automated computational protocol has been designed and implemented to achieve this. The correlation dimension map is also contrasted with prior research that mapped the peak intensity of the output power as an experimentally accessible measurand reflecting the dynamical state of the system [Valling et al., Phys. Rev. A 72, 033810 (2005)].
Broadband multi-mode output from modulated two-section semiconductor lasers
Publisher: IEEE
Date: 2002
Comparison of FM dye lasers in standing-wave and ring configuration
Publisher: Springer Science and Business Media LLC
Date: 07-1986
DOI: 10.1007/BF00697244
Coupled-cavity effects in FM semiconductor lasers
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 06-1999
DOI: 10.1109/50.769310
Precision threshold current measurement for semiconductor lasers based on relaxation oscillation frequency
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 08-2009
Dynamics and Interaction of Laser Cavity Solitonsin Broad‐Area Semiconductor Lasers
Publisher: Wiley
Date: 18-12-2015
Time-resolved vacuum-ultraviolet emission (λ = 60–120 nm) from a high pressure DBD-excited helium plasma: formation mechanisms of the fast component
Publisher: IOP Publishing
Date: 22-01-2016
Nanoparticle measurement in the optical far-field
Publisher: IEEE
Date: 05-2013
A time-resolved spectroscopic study of UV/visible emissions from the He*/He-2* (n=3) manifold states: formation channels for fast He-2* production
Publisher: IOP Publishing
Date: 07-09-2015
Doppler-free two-photon absorption spectroscopy with a frequency-modulated dye laser
Publisher: The Optical Society
Date: 09-1987
DOI: 10.1364/OL.12.000666
Abstract: A new method of Doppler-free two-photon spectroscopy has been developed in which a frequency-modulated (FM) dye laser is used to perform high-resolution spectroscopy. This provides an ideal method of locking a broadband FM laser to a narrow atomic or molecular reference line, a necessary step in using the FM laser for optical-frequency metrology. The method may also be used to test how closely the FM dye laser approaches a pure FM oscillation.
Dynamics of broad area diode lasers with phase conjugate feedback
Publisher: IEEE
Date: 2000
Atomic force microscopy of orb-spider-web-silks to measure surface nanostructuring and evaluate silk fibers per strand
Publisher: AIP Publishing
Date: 10-2010
DOI: 10.1063/1.3490220
Abstract: Atomic force microscopy (AFM) study is used to measure the surface topology and roughness of radial and capture spider silks on the micro- and nanoscale. This is done for silks of the orb weaver spider Argiope keyserlingi. Capture silk has a surface roughness that is five times less than that for radial silk. The capture silk has an equivalent flatness of λ/100 (5–6 nm deep surface features) as an optical surface. This is equivalent to a very highly polished optical surface. AFM does show the number of silk fibers that make up a silk thread but geometric distortion occurs during s le preparation. This prevented AFM from accurately measuring the silk topology on the microscale in this study.
Mapping the dynamic complexity of a semiconductor laser with optical feedback using permutation entropy
Publisher: The Optical Society
Date: 17-01-2014
DOI: 10.1364/OE.22.001713
Optics of spider sticky orb webs
Publisher: SPIE
Date: 24-03-2011
DOI: 10.1117/12.880665
Wavelength switching by positively detuned side-mode injection in semiconductor lasers
Publisher: AIP Publishing
Date: 29-05-2000
DOI: 10.1063/1.126619
Dehydroxylation of UV fused silica slides via UV laser irradiation
Publisher: IEEE
Date: 2002
Single frequency UV generation using a frequency modulated dye laser
Publisher: Elsevier BV
Date: 1987
Efficient Bayesian estimation of permutation entropy with Dirichlet priors
Publisher: Elsevier BV
Date: 05-2022
How will COVID-19 change how we teach physics, post pandemic?
Publisher: Springer Science and Business Media LLC
Date: 20-07-2020
Frequency modulated external cavity diode lasers
Publisher: IEEE
Date: 1994
Multi-section semiconductor lasers: Their design can serve multiple applications and open possibilities for new applications
Publisher: IEEE
Date: 12-2014
Broad-area diode lasers with plane-mirror and phase-conjugate feedback
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 2002
DOI: 10.1109/50.974824
Image contrast immersion method for measuring refractive index applied to spider silks
Publisher: The Optical Society
Date: 19-09-2011
DOI: 10.1364/OE.19.019182
Permutation entropy of finite-length white-noise time series
Publisher: American Physical Society (APS)
Date: 12-08-2016
Micro-volumetric analysis of complex fs laser processed sites using optical surface profilometry (OSP)
Publisher: Elsevier BV
Date: 08-2021
High-pressure (>1 bar) dielectric barrier discharge lamps generating short pulses of high-peak power vacuum ultraviolet radiation
Publisher: IOP Publishing
Date: 20-08-2004
Instantaneous frequency measurement applied to semiconductor laser relaxation oscillations
Publisher: Springer Science and Business Media LLC
Date: 05-11-2010
High Accuracy Measurement of Relaxation Oscillation Frequency in Heavily Damped Quantum Well Lasers
Publisher: IEEE
Date: 2006
High energy laser pulse irradiation of a silica microsphere on a glass surface for sub-micron patterning
Publisher: IEEE
Date: 2006
Laser irradiation of microspheres and shard-like chalcogenide glass particles on a silica surface
Publisher: IEEE
Date: 12-2006
Laser removal of paraffin wax from glass surfaces
Publisher: AIP Publishing
Date: 10-2002
DOI: 10.1063/1.1509097
Abstract: Waxes and thermopolymers are commonly used to mount optical and photonic materials prior to polishing and singularization. After demounting, residual wax/thermopolymer can adhere to the component surface, frequently in the form of particles. Dry, ultraviolet-pulsed laser cleaning has been demonstrated to effectively remove paraffin wax particles, prepared on a glass surface using a wax aerosol technique. This method produces dome-shaped particles. Experimental evidence suggests the dome-shaped particles are vaporized by the absorption of the energy from the laser pulse. A theoretical model based on vaporization has been developed and this leads to predictions of the critical fluence for single laser pulse removal of dome-shaped particles which is in good agreement with that experimentally measured (220 mJ/cm2). The model also gives insight into the geometries and relative thermal properties of the “particles” and surface, which are important in determining whether removal by vaporization is a viable process.
Performance Enhancement of a Dielectric Barrier Discharge Vacuum-Ultraviolet Photon Source Using Short-Pulsed Electrical Excitation
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 2018
Pharmacokinetics of Ceftolozane-Tazobactam during Prolonged Intermittent Renal Replacement Therapy
Publisher: S. Karger AG
Date: 2018
DOI: 10.1159/000493196
Abstract: b i Background: /i /b Prolonged intermittent renal replacement therapy (PIRRT) eliminates many drugs, and without dosing data, for new antibiotics like ceftolozane/tazobactam, suboptimal concentrations and treatment failure are likely. b i Objectives: /i /b Herein, we describe the effect of PIRRT on the plasma pharmacokinetics of ceftolozane/tazobactam administered in a critically ill 55-year-old patient with a polymicrobial sternal wound osteomyelitis, including a multiresistant i Pseudomonas aeruginosa /i . b i Method: /i /b Blood s les were taken over 4 days where the patient received a 7.5-h PIRRT treatment. One- and 2-compartment models were tested for ceftolozane and tazobactam separately, and the log-likelihood ratio and goodness-of-fit plots were used to select the final model. b i Results: /i /b Two-compartment models were developed for ceftolozane and tazobactam separately and described significant differences in clearance of ceftolozane and tazobactam with and without PIRRT (8.273 vs. 0.393 and 8.020 vs. 0.767 L/h, respectively). b i Conclusions: /i /b A ceftolozane/tazobactam dose of 500 mg/250 mg appears to be sufficient to attain pharmacokinetic harmacodynamic targets during PIRRT while the manufacturer’s recommended dosing of 100 mg/50 mg every 8 h was sufficient during non-PIRRT periods.
Determination of external cavity coupling-coefficient for diode laser with phase-conjugate feedback
Publisher: Institution of Engineering and Technology (IET)
Date: 2000
DOI: 10.1049/EL:20000402
Optical surface profilometry of low reflectance materials
Publisher: WORLD SCIENTIFIC
Date: 2007
Modulation induced coherence collapse
Publisher: Elsevier BV
Date: 10-1994
Longitudinal mode noise conversion by atomic vapour
Publisher: Elsevier BV
Date: 12-1995
Perceptions of ‘naturalness’ by urban park visitors: Insights from Perth, Western Australia
Publisher: Elsevier BV
Date: 12-2021
Optical emission spectroscopy system operating in the vacuum-ultraviolet spectral range λ < 100 nm
Publisher: IOP Publishing
Date: 02-07-2015
Contrasting conventional optical and phase-conjugate feedback in laser diodes
Publisher: American Physical Society (APS)
Date: 06-02-2001
Laser absorption measurements of atomic metastable densities
Publisher: IOP Publishing
Date: 14-08-1983
Pharmacokinetics of valganciclovir and voriconazole during prolonged intermittent renal replacement therapy in a lung transplant recipient
Publisher: Wiley
Date: 12-03-2022
DOI: 10.1111/TID.13818
Cavity decoupling in external cavity FM diode lasers
Publisher: Institution of Engineering and Technology (IET)
Date: 1997
DOI: 10.1049/EL:19970042
Pulsed laser cleaning - Comparing science with art & cultural heritage applications
Publisher: SPIE
Date: 08-05-2008
DOI: 10.1117/12.783603
Output power changes in laser diodes subject to sub-wavelength variations in external cavity length: theory and experiment
Publisher: IEEE
Date: 2000
Dry laser cleaning threshold fluence - How can it be measured accurately?
Publisher: SPIE
Date: 19-02-2002
DOI: 10.1117/12.456882
Transition to pulsed operation in short external-cavity FM semiconductor lasers
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 05-1999
DOI: 10.1109/3.760327
An exact surface-integral approach for accurate interferometric microscopy of single nanoparticles
Publisher: The Optical Society
Date: 27-02-2015
DOI: 10.1364/OE.23.006228
SURFACE CLEANING OF OPTICAL MATERIALS USING NOVEL VUV SOURCES
Publisher: WORLD SCIENTIFIC
Date: 2007
Optimum modulation frequency for FM seeded FSF laser ranging
Publisher: Institution of Engineering and Technology (IET)
Date: 12-2006
FM dye lasers
Publisher: Springer Science and Business Media LLC
Date: 03-1986
DOI: 10.1007/BF00697415
Single-femtosecond-laser-pulse interaction with mica
Publisher: Elsevier BV
Date: 05-2020
Optical surface profiling of orb-web spider capture silks
Publisher: IOP Publishing
Date: 16-08-2010
DOI: 10.1088/1748-3182/5/3/036004
Abstract: Much spider silk research to date has focused on its mechanical properties. However, the webs of many orb-web spiders have evolved for over 136 million years to evade visual detection by insect prey. It is therefore a photonic device in addition to being a mechanical device. Herein we use optical surface profiling of capture silks from the webs of adult female St Andrews cross spiders (Argiope keyserlingi) to successfully measure the geometry of adhesive silk droplets and to show a bowing in the aqueous layer on the spider capture silk between adhesive droplets. Optical surface profiling shows geometric features of the capture silk that have not been previously measured and contributes to understanding the links between the physical form and biological function. The research also demonstrates non-standard use of an optical surface profiler to measure the maximum width of a transparent micro-sized droplet (microlens).
Subdiffraction-limited radius measurements of microcylinders using conventional bright-field optical microscopy
Publisher: The Optical Society
Date: 28-08-2014
DOI: 10.1364/OL.39.005196
Enhanced performance of an EUV light source (lambda=84 nm) using short-pulse excitation of a windowless dielectric barrier discharge in neon
Publisher: IOP Publishing
Date: 15-12-2010
Informing Educational Approaches to PRME Using Foucault
Publisher: Springer International Publishing
Date: 2019
Quantum noise management in multi-element laser diode arrays
Publisher: IOP Publishing
Date: 28-07-2004
Optogalvanic signals generated in a neon positive column discharge by resonant chopped cw radiation at 588.2 nm
Publisher: AIP Publishing
Date: 09-1984
DOI: 10.1063/1.334131
Abstract: The optogalvanic line profile for the 1s5-2p2 transition (Paschen notation) in a neon positive column discharge has been studied as a function of dye laser power (0–300 mW) and discharge conditions (2–20 mA, 1–2.5 Torr) for a variety of experimental arrangements, incorporating simultaneous absorption and emission studies. Under certain discharge conditions the sign of the optogalvanic signal changes as a function of dye laser power. A set of four rate equations describing the populations of the 1s5, 1s4, 1s3, and 2p2 levels in neon with and without resonant laser irradiation on the 1s5-2p2 transition at 588.2 nm are solved in the steady state. The steady-state values are used as initial values for numerical integration of the rate equations to show the time evolution of the various populations as the laser is switched on and off. A qualitative interpretation of the expected optogalvanic signal may be made from the results. In particular, it is seen that buildup in the 1s3 metastable density with laser irradiation on the 588.2-nm transition can explain the above observations of a sign reversal in a neon positive column discharge.
Experimental nonlinear laser systems: Bigger data for better science?
Publisher: AIP Publishing LLC
Date: 2014
DOI: 10.1063/1.4897677
Instabilities in semiconductor laser with optical feedback and modulation
Publisher: IEEE
Date: 12-2010
Global Survey of the Frequency of Atrial Fibrillation–Associated Stroke
Publisher: Ovid Technologies (Wolters Kluwer Health)
Date: 09-2016
DOI: 10.1161/STROKEAHA.116.013378
Abstract: Atrial fibrillation (AF) is increasingly recognized as the single most important cause of disabling ischemic stroke in the elderly. We undertook an international survey to characterize the frequency of AF-associated stroke, methods of AF detection, and patient features. Consecutive patients hospitalized for ischemic stroke in 2013 to 2014 were surveyed from 19 stroke research centers in 19 different countries. Data were analyzed by global regions and World Bank income levels. Of 2144 patients with ischemic stroke, 590 (28% 95% confidence interval, 25.6–29.5) had AF-associated stroke, with highest frequencies in North America (35%) and Europe (33%) and lowest in Latin America (17%). Most had a history of AF before stroke (15%) or newly detected AF on electrocardiography (10%) only 2% of patients with ischemic stroke had unsuspected AF detected by poststroke cardiac rhythm monitoring. The mean age and 30-day mortality rate of patients with AF-associated stroke (75 years SD, 11.5 years 10% 95% confidence interval, 7.6–12.6, respectively) were substantially higher than those of patients without AF (64 years SD, 15.58 years 4% 95% confidence interval, 3.3–5.4 P .001 for both comparisons). There was a strong positive correlation between the mean age and the frequency of AF ( r =0.76 P =0.0002). This cross-sectional global s le of patients with recent ischemic stroke shows a substantial frequency of AF-associated stroke throughout the world in proportion to the mean age of the stroke population. Most AF is identified by history or electrocardiography the yield of conventional short-duration cardiac rhythm monitoring is relatively low. Patients with AF-associated stroke were typically elderly ( years old) and more often women.
Dynamics of a semiconductor laser with frequency shifted feedback
Publisher: SPIE
Date: 07-03-2014
DOI: 10.1117/12.2038871
Investigating the transverse optical structure of spider silk micro-fibers using quantitative optical microscopy
Publisher: Walter de Gruyter GmbH
Date: 20-10-2017
Abstract: The transverse optical structure of two orb-weaver (family Araneidae ) spider dragline silks was investigated using a variant of the inverse-scattering technique. Immersing the silks in a closely refractive index-matched liquid, the minimum achievable image contrast was greater than expected for an optically homogeneous silk, given what is currently known about the optical absorption of these silks. This “excess contrast” indicated the presence of transverse optical structure within the spider silk. Applying electromagnetic scattering theory to a transparent double cylinder, the minimum achievable irradiance contrast for the Plebs eburnus and Argiope keyserlingi dragline silks was determined to be consistent with step index refractive index contrasts of 1−4×10 −4 and 6–7×10 −4 , respectively, supposing outer-layer thicknesses consistent with previous TEM studies (50 nm and 100 nm, respectively). The possibility of graded index refractive index contrasts within the spider silks is also discussed. This is the strongest evidence, to date, that there is a refractive index contrast associated with the layered morphology of spider silks and/or variation of proportion of nanocrystalline components within the spider silk structure. The method is more generally applicable to optical micro-fibers, including those with refractive index variations on a sub-wavelength scale.
Micro-optical elements and optical materials of certain spider webs
Publisher: SPIE
Date: 06-2012
DOI: 10.1117/12.922327
Corrosion at the surface of chalcogenide glass microspheres
Publisher: IOP Publishing
Date: 04-04-2012
Acoustic substrate expansion in modelling dry laser cleaning of low absorbing substrates
Publisher: Springer Science and Business Media LLC
Date: 08-2004
Refractive index measurements of double-cylinder structures found in natural spider silks
Publisher: SPIE
Date: 02-05-2014
DOI: 10.1117/12.2052261
Measuring nanoparticle size using phase-stepping interferometry
Publisher: The Optical Society
Date: 09-07-2014
DOI: 10.1364/AO.53.004548
Mapping transients in the nonlinear dynamics of an optically injected VCSEL
Publisher: SPIE
Date: 06-2012
DOI: 10.1117/12.922168
Removing particles from glass with ultraviolet laser cleaning
Publisher: IEEE
Date: 1998
Optoelectronic technology profiles: motivating and developing research skills in undergraduate students
Publisher: SPIE
Date: 05-06-2009
DOI: 10.1117/12.2207978
Stability calculations for a commercial ring dye laser resonator with two FOCI
Publisher: Elsevier BV
Date: 1984
A quantitative analysis of single pulse ultraviolet dry laser cleaning
Publisher: AIP Publishing
Date: 15-12-1999
DOI: 10.1063/1.371737
Abstract: Particles as small as 0.3 μm in diameter have been successfully removed from a glass surface using a single ultraviolet pulse from a frequency doubled copper vapor laser (255.3 nm). Quantitative analysis of the particle density before and after laser irradiation shows that laser cleaning occurs after a fluence threshold is reached. The cleaning efficiency after threshold follows a nonlinear trend with respect to fluence. A model is presented which reveals that the cleaning efficiency is a function of the irradiance distribution of the beam used. Results of modeling thermal expansion of the substrate and particles, and particle adhesion do not confirm a thermal expansion mechanism for laser cleaning in this study, in contrast with other recent reports.
Development of incoherent EUV/VUV light sources: Tailoring the output pulse characteristics for materials processing applications
Publisher: IEEE
Date: 02-2010
Side-mode resonance in a Fabry-Perot semiconductor laser with intermodal injection
Publisher: IEEE
Date: 2000
Complexity mapping of a photonic integrated circuit laser using a correlation-dimension-based approach
Publisher: IOP Publishing
Date: 25-06-2019
Optical surface profilometry and AFM of Orb weaver spider silks
Publisher: IEEE
Date: 02-2010
Ultrafast laser-pulse processing of muscovite - Contrasting response at 515 nm and 800 nm
Publisher: Optica Publishing Group
Date: 2020
DOI: 10.1364/CLEOPR.2020.C11A_2
Abstract: Muscovite, a dielectric, shows a qualitatively different response to irradiation with a single ~150fs laser pulse at 515 nm as compared to 800 nm. Pulse fluences up to 7J/cm 2 are studied. © 2020 The Author(s)
External cavity laser diodes with frequency-shifted feedback
Publisher: Elsevier BV
Date: 04-1995
Optogalvanic signals generated in a neon positive column discharge by resonant chopped CW radiation at 588.2 nm
Publisher: Elsevier BV
Date: 10-1983
A new approach to modelling the coherence of optical feedback in dynamical semiconductor laser systems
Publisher: IEEE
Date: 12-2018
Focussed ion beam milling of silica microspheres
Publisher: IEEE
Date: 12-2010
Phase-stepping interferometry of GaAs nanowires
Publisher: AIP Publishing
Date: 14-10-2013
DOI: 10.1063/1.4825153
Abstract: Phase stepping interferometry is used to measure the size of near-cylindrical nanowires. Nanowires with nominal radii of 25 nm and 50 nm were used to test this by comparing specific measured optical phase profile values with theoretical values calculated using a wave-optic model of the Phase stepping interferometry (PSI) system. Agreement within 10% was found, which enabled nanowire radii to be predicted within 4% of the nominal value. This demonstration highlights the potential capability for phase stepping interferometry to characterize single nanoparticles of known geometry in the optical far-field.
He II λ4686 IN η CARINAE: COLLAPSE OF THE WIND-WIND COLLISION REGION DURING PERIASTRON PASSAGE
Publisher: American Astronomical Society
Date: 25-01-2012
Metrology of holes in gold nano-film using interferometric microscopy
Publisher: IEEE
Date: 12-2014
Influence of external cavity length on the coherence collapse regime in laser diodes subject to optical feedback
Publisher: Institution of Engineering and Technology (IET)
Date: 02-2001
A driver for stable-frequency operation of laser diodes
Publisher: AIP Publishing
Date: 04-1992
DOI: 10.1063/1.1143181
Abstract: A driver for the stable-frequency operation of an AlGaAs laser diode is described. This consists of a constant current source with short-term fluctuations of ±8 μA and a drift of less than 2 μA in 10 h, in conjunction with a ±1 mdeg temperature controller. The current can be set to values up to 100 mA and a r current up to 20 mA can be added to this to allow frequency scanning of the laser. The laser linewidth is measured by heterodyning two such stabilized lasers and recording the beat note. This has a width of 27±7 MHz. The frequency drift is monitored by exciting the D2 transition of cesium and recording the change in absorbed power when a laser is tuned to the side of an absorption peak. The drift is measured to be 10 kHz/s over 5 h, and is attributed largely to temperature drift. In addition, the current circuit can be readily interfaced to a microcomputer for automatic control of the laser current without sacrificing stability.
Measuring the refractive index of spider silks using image-contrast immersion methods
Publisher: IEEE
Date: 08-2011
Laboratory report writing on optical physics undergraduate labs: draft and feedback processes to facilitate student learning and skill development
Publisher: SPIE
Date: 05-06-2009
DOI: 10.1117/12.2208047
Hybrid electronic/optical synchronized chaos communication system
Publisher: The Optical Society
Date: 23-04-2009
DOI: 10.1364/OE.17.007556
Abstract: A hybrid electronic/optical system for synchronizing a chaotic receiver to a chaotic transmitter has been demonstrated. The chaotic signal is generated electronically and injected, in addition to a constant bias current, to a semiconductor laser to produce an optical carrier for transmission. The optical chaotic carrier is photodetected to regenerate an electronic signal for synchronization in a matched electronic receiver The system has been successfully used for the transmission and recovery of a chaos masked message that is added to the chaotic optical carrier. Past demonstrations of synchronized chaos based, secure communication systems have used either an electronic chaotic carrier or an optical chaotic carrier (such as the chaotic output of various nonlinear laser systems). This is the first electronic/optical hybrid system to be demonstrated. We call this generation of a chaotic optical carrier by electronic injection.
Creation of adhesion resistant silica glass surfaces with ultraviolet laser cleaning
Publisher: IEEE
Date: 1996
Nanometrology of sub-wavelength circular holes in gold nanofilms using optical surface profilometry
Publisher: IEEE
Date: 05-2013
Injection locking suppression of coherence collapse in a diode laser with optical feedback
Publisher: Elsevier BV
Date: 08-1999
Focused ion beam sectioning of micro-optics as a tool for destructive testing for optical material
Publisher: SPIE
Date: 06-2012
DOI: 10.1117/12.922154
Astigmatism compensation in off-axis laser resonators with two or more coupled foci
Publisher: Elsevier BV
Date: 05-1989
Laser cleaning of particles from surfaces - Issues relating to sample preparation
Publisher: SPIE
Date: 19-02-2002
DOI: 10.1117/12.456826
Optical microscopy imaging and image-analysis issues in laser cleaning
Publisher: Springer Science and Business Media LLC
Date: 11-2003
Optical surface profilometry as a means to build experimental research skills including planning
Publisher: Optica Publishing Group
Date: 2021
Abstract: An optical surface profiler is used as a sophisticated, high-tech, “high”-cost instrument for learning experimental research skills in the context of a Masters in Research degree. Students are being prepared for higher degree research.
Low level optical feedback in semiconductor lasers as a tool to identify nonlinear enhancement of device noise
Publisher: IEEE
Date: 12-2010
Nonlinear dynamics of semiconductor lasers with feedback and modulation
Publisher: The Optical Society
Date: 26-07-2010
DOI: 10.1364/OE.18.016955
Quantum noise properties of laser diode arrays
Publisher: SPIE
Date: 16-05-2003
DOI: 10.1117/12.497235
Variance of permutation entropy and the influence of ordinal pattern selection
Publisher: American Physical Society (APS)
Date: 16-05-2017
Variable pulse repetition frequency output from an optically injected solid state laser
Publisher: The Optical Society
Date: 24-02-2011
DOI: 10.1364/OE.19.004692
Electric-arc cleaning of optical-fiber endfaces
Publisher: The Optical Society
Date: 08-1996
DOI: 10.1364/AO.35.004516
<title>Pulsed VUV sources and their application to surface cleaning of optical materials</title>
Publisher: SPIE
Date: 02-04-2004
DOI: 10.1117/12.552735
External-cavity diode lasers with different devices and collimating optics
Publisher: The Optical Society
Date: 20-07-1995
DOI: 10.1364/AO.34.004316
Uncertainty in interpulse time interval evaluated as a new measure of nonlinear laser dynamics
Publisher: IEEE
Date: 08-2011
Modification of the beam profile from semiconductor lasers by spatial manipulation of an optical feedback field
Publisher: IEEE
Date: 2000
Evaluation of imperfections in silica and chalcogenide glass microspheres using focussed ion beam milling and imaging
Publisher: Wiley
Date: 07-06-2012
DOI: 10.1111/J.1365-2818.2012.03631.X
Abstract: Microspheres made from optical glasses such as silica and chalcogenide are used as both passive and active optical elements in micro-optics systems and devices. The homogeneity of the microspheres is crucial to their optical quality and performance in such devices and so it is essential, in optimizing such systems, that techniques with nanometer scale resolution are developed to measure the internal structure and homogeneity of such spheres. In this work an analytical protocol based on focussed ion beam milling, combined with secondary ion and secondary electron imaging, has been developed to study the internal homogeneity of glass microspheres. The results have shown that silica microspheres with diameters of three to five microns, fabricated by a sol-gel method, have internal inhomogeneities and voids that will lead to non-uniform optical properties. The FIB milling and imaging technique developed has been found to be a very useful method of studying such inhomogeneities, which have been proposed, but never previously observed, in glass microspheres. The FIB based technique has also been used on larger chalcogenide glass (Ga(2)S(3):La(2)S(3)) microspheres (diameter of order 70 microns) but no inhomogeneities have been observed at the spatial resolution of a few microns so far achieved for these larger microspheres. This study suggests that the FIB based milling and imaging technique may have potential for quantitative use in the measurement of morphological variations in such systems as well as in the study of aging processes in micron-sized glass spheres.
High-order external cavity modes and restabilization of a laser diode subject to a phase-conjugate feedback
Publisher: The Optical Society
Date: 11-01-2017
DOI: 10.1364/OL.42.000306
Laser cleaning of alumina particles on glass and silica substrates: Experiment and quasistatic model
Publisher: AIP Publishing
Date: 19-05-2003
DOI: 10.1063/1.1572541
Abstract: Silica and microscope slides that had been pretreated with a variety of wet chemical, ultrasonic and laser irradiation surface preparation methods were contaminated with alumina particles of around 3 μm. The s les were prepared and processed without delay so as to avoid capillary condensation in a high humidity environment and thus ensuring that the process is dry laser cleaning. They were then irradiated with a pulse of 248 nm radiation from a KrF excimer laser, over a range of fluences. The laser cleaning results show that, in this case, the surface preparation method appears to have little effect on the laser cleaning efficiency. They also demonstrate that the threshold fluence for particle removal of silica is approximately eight times higher than that for microscope slides, when so prepared. In contrast, application of Arnold et al.’s thermal expansion model of laser cleaning in the quasistatic limit to this material system predicts that the threshold fluence for silica will be about 15 times greater than that for glass. One possible explanation for this discrepancy may be that the particle’s absorptivity (0.16) is inaccurate. A value of 0.35 gives good agreement between theory and experiment.
Using machine learning to explore the dynamics of complex laser systems
Publisher: OSA
Date: 2016
ToF-SIMS of femtosecond laser irradiated muscovite with topography: Evidence of Na and K enrichment near the surface
Publisher: Elsevier BV
Date: 04-2022
Permutation entropy analysis as a tool to characterize pulsed lasing regions
Publisher: IEEE
Date: 09-2014
Open database from experimental laser systems-Resource for photonics simulations
Publisher: IEEE
Date: 07-2016
Measuring the optical properties of natural silks
Publisher: IEEE
Date: 05-2013
Nonlinear dynamics of a laser diode with optical feedback systems subject to modulation
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 2002
DOI: 10.1109/3.980271
Maps of the diverse output characteristics of a 4-section photonic integrated laser
Publisher: IEEE
Date: 09-2014
Integrated semiconductor laser with optical feedback: transition from short to long cavity regime
Publisher: The Optical Society
Date: 10-07-2015
DOI: 10.1364/OE.23.018754
Hybrid immersion-polarization method for measuring birefringence applied to spider silks
Publisher: The Optical Society
Date: 14-10-2011
DOI: 10.1364/OL.36.004098
Exploring worker consciousness in China
Publisher: Informa UK Limited
Date: 02-07-2016
Quantum noise penalty in laser diode arrays
Publisher: Institution of Engineering and Technology (IET)
Date: 04-2003
Semiconductor Laser with Delayed Optical Feedback - What Simulations Tell Us That We Didn't Know
Publisher: Optica Publishing Group
Date: 2020
DOI: 10.1364/CLEOPR.2020.C4C_4
Abstract: Comprehensive numerical simulations of a semiconductor laser with optical feedback system showing the impact of key laser parameters on dynamical mapping are reported. These raise new opportunities for optimising such systems for their key applications.
Influence of the angular alignment of the optical feedback field on external cavity diode laser characteristics
Publisher: Elsevier BV
Date: 1999
Imperfections in micro-optics characterised using focussed ion beam sectioning and imaging
Publisher: IEEE
Date: 08-2011
Frequency noise spectroscopy lineshape measurements and simulations for a semiconductor laser with strong optical feedback
Publisher: Elsevier BV
Date: 08-1999
Chaotic semiconductor laser (CSL) and synchronised CSL - chaos analysis and noise
Publisher: IEEE
Date: 2005
Nanoscale Material Heterogeneity of Glowworm Capture Threads Revealed by AFM
Publisher: MDPI AG
Date: 08-06-2021
DOI: 10.3390/MOLECULES26123500
Abstract: Adhesive materials used by many arthropods for biological functions incorporate sticky substances and a supporting material that operate synergistically by exploiting substrate attachment and energy dissipation. While there has been much focus on the composition and properties of the sticky glues of these bio-composites, less attention has been given to the materials that support them. In particular, as these materials are primarily responsible for dissipation during adhesive pull-off, little is known of the structures that give rise to functionality, especially at the nano-scale. In this study we used tapping mode atomic force microscopy (TM-AFM) to analyze unstretched and stretched glowworm (Arachnoc a tasmaniensis) capture threads and revealed nano-scale features corresponding to variation in surface structure and elastic modulus near the surface of the silk. Phase images demonstrated a high resolution of viscoelastic variation and revealed mostly globular and elongated features in the material. Increased vertical orientation of 11–15 nm wide fibrillar features was observed in stretched threads. Fast Fourier transform analysis of phase images confirmed these results. Relative viscoelastic properties were also highly variable at inter- and intra-in idual levels. Results of this study demonstrate the practical usefulness of TM-AFM, especially phase angle imaging, in investigating the nano-scale structures that give rise to macro-scale function of soft and highly heterogeneous materials of both natural and synthetic origins.
MODULATION INDUCED COHERENCE COLLAPSE IN FM DIODE-LASERS
Publisher: Elsevier BV
Date: 04-1994
Orb web spider silks: how their optics affects potential visibility
Publisher: SPIE
Date: 30-12-2019
DOI: 10.1117/12.2541128
Long-term biogas slurry application increased antibiotics accumulation and antibiotic resistance genes (ARGs) spread in agricultural soils with different properties
Publisher: Elsevier BV
Date: 03-2021
Polymer like response of muscovite upon 515 nm femtosecond laser pulse processing
Publisher: Elsevier BV
Date: 03-2021
High resolution mapping of the dynamics of a nonlinear semiconductor laser system
Publisher: IEEE
Date: 05-2013
Insights on correlation dimension from dynamics mapping of three experimental nonlinear laser systems
Publisher: Public Library of Science (PLoS)
Date: 24-08-2017
Analysis Tools to Uncover Variations in Picosecond Mode-Locked Pulses
Publisher: Optica Publishing Group
Date: 2020
DOI: 10.1364/CLEOPR.2020.C6B_1
Abstract: A big data approach is demonstrated for quality assurance of mode-locked pulses longer than ~20 ps. Real-time recordings of pulses s led at 200 Gs/s are analysed to quantify pulse consistency within sequences of ~50,000 pulses.
Reduced threshold ultraviolet laser ablation of glass substrates with surface particle coverage: A mechanism for systematic surface laser damage
Publisher: AIP Publishing
Date: 05-2000
DOI: 10.1063/1.373100
Abstract: A recent study of ultraviolet laser cleaning of silica glass surfaces contaminated with medium density alumina particles has shown a systematic type of laser-induced surface damage. This is characterized as a pit which increases in diameter and depth with increasing irradiating fluence. The damage pit occurs at lower fluence levels when smaller contaminant particles are used. The pits are due to laser ablation of the particle coated glass surface. The threshold for this laser ablation is well below that for a s le of the glass in its uncontaminated condition and the efficiency of ablation is estimated as being about 1000 times greater than that for silica. This laser damage is difficult to visualize by standard optical microscopy and could easily go undetected in laser cleaning studies. It may have general implications in the application of the new laser cleaning technologies to a variety of surfaces, including dielectrics and semiconductors, where medium to high densities of contaminant particles are present. It is also significant in suggesting processes by which glass may be rendered more readily machinable by laser ablative methods.
Analysis of chaotic semiconductor laser diodes
Publisher: IEEE
Date: 12-2006
Modelling laser cleaning of low-absorbing substrates
Publisher: Springer Science and Business Media LLC
Date: 09-2004
Permutation entropy with vector embedding delays
Publisher: American Physical Society (APS)
Date: 12-12-2017
Correlation dimension signature of wideband chaos synchronization of semiconductor lasers
Publisher: The Optical Society
Date: 2006
DOI: 10.1364/OL.31.000020
Abstract: Chaos data analysis has been performed on the chaotic output power time series data from a synchronized transmitter-receiver pair of semiconductor lasers. The system uses an asymmetric, bidirectional coupling configuration between the master (transmitter), which is a laser diode with optical feedback, and a stand-alone slave semiconductor laser. The correlation dimension of the chaotic time series has a minimum value of 4, which was obtained from high-bandwidth measurements. The correlation dimensions for both the master and the synchronized slave are identical when the cross-correlation coefficient of the synchronized chaos is above 0.9. These results establish correlation dimension analysis as an effective tool for the determination of the quality of wideband chaos synchronization.
Use of instantaneous frequency measurement to determine the injection current range giving valid Relaxation Oscillation Frequency values in quantum well lasers
Publisher: IEEE
Date: 02-2010
Isotope and hyperfine splittings for two UV transitions in tungsten I by saturation and polarisation spectroscopy
Publisher: Elsevier BV
Date: 06-1984
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