ORCID Profile
0000-0001-9819-1746
Current Organisation
Macquarie 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)
Optics And Opto-Electronic Physics | Optical Physics | Photonics, Optoelectronics and Optical Communications | Optical And Photonic Systems | Communications Technologies | Nanotechnology | Nanophotonics | Lasers and Quantum Electronics | Classical and Physical Optics | Quantum Optics And Lasers | Nanofabrication, Growth and Self Assembly | Nanotechnology | Microelectronics and Integrated Circuits | Composite Materials | Complex Physical Systems | Medical Physics | Other Electronic Engineering | Invertebrate Biology | Materials Engineering | Biomedical Engineering Not Elsewhere Classified | Theoretical Physics | Condensed Matter Physics—Electronic And Magnetic Properties; | Microwave And Millimetrewave Technology | Engineering And Technology Not Elsewhere Classified | Solid State Chemistry | Nanometrology | Signal Processing | Nanomaterials | Other Physical Sciences | Opthalmology And Vision Science | Cellular Nervous System | Astronomy And Astrophysics | Nuclear And Particle Physics
ANZSRC Socio-Economic Objective (SEO)
Physical sciences | Expanding Knowledge in the Physical Sciences | Telecommunications | Combined operations | Expanding Knowledge in Technology | Communication equipment not elsewhere classified | Navy | Integrated circuits and devices | Expanding Knowledge in Engineering | Network switching equipment | Fixed Line Data Networks and Services | Other | Communication Networks and Services not elsewhere classified | Industrial instrumentation | Medical instrumentation | Expanding Knowledge in the Medical and Health Sciences | Surgical methods and procedures | Scientific instrumentation | Expanding Knowledge in the Chemical Sciences | Scientific Instruments | Expanding Knowledge in the Biological Sciences |
Related Links
Publications
Multiple fibre gratings fabricated using frequency-doubled copper vapour lasers
Publisher: Institution of Engineering and Technology (IET)
Date: 1998
DOI: 10.1049/EL:19981666
Growth of thin film crystalline waveguides
Publisher: IEEE
Date: 2005
Optimization of Er, Yb:YCOB for CW laser operation
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 11-2004
Microstructure fabrication using heat shrinkable polymer films
Publisher: IEEE
Date: 2003
Spontaneous Emission from Nanodiamond NV Color Centers on Structured Surfaces
Publisher: OSA
Date: 2011
Photothermal effects of laser tissue soldering
Publisher: IOP Publishing
Date: 1999
DOI: 10.1088/0031-9155/44/4/013
Abstract: Low-strength anastomoses and thermal damage of tissue are major concerns in laser tissue welding techniques where laser energy is used to induce thermal changes in the molecular structure of the tissues being joined, hence allowing them to bond together. Laser tissue soldering, on the other hand, is a bonding technique in which a protein solder is applied to the tissue surfaces to be joined, and laser energy is used to bond the solder to the tissue surfaces. The addition of protein solders to augment tissue repair procedures significantly reduces the problems of low strength and thermal damage associated with laser tissue welding techniques. Investigations were conducted to determine optimal solder and laser parameters for tissue repair in terms of tensile strength, temperature rise and damage and the microscopic nature of the bonds formed. An in vitro study was performed using an 808 nm diode laser in conjunction with indocyanine green (ICG)-doped albumin protein solders to repair bovine aorta specimens. Liquid and solid protein solders prepared from 25% and 60% bovine serum albumin (BSA), respectively, were compared. The efficacy of temperature feedback control in enhancing the soldering process was also investigated. Increasing the BSA concentration from 25% to 60% greatly increased the tensile strength of the repairs. A reduction in dye concentration from 2.5 mg ml(-1) to 0.25 mg ml(-1) was also found to result in an increase in tensile strength. Increasing the laser irradiance and thus surface temperature resulted in an increased severity of histological injury. Thermal denaturation of tissue collagen and necrosis of the intimal layer smooth muscle cells increased laterally and in depth with higher temperatures. The strongest repairs were produced with an irradiance of 6.4 W cm(-2) using a solid protein solder composed of 60% BSA and 0.25 mg ml(-1) ICG. Using this combination of laser and solder parameters, surface temperatures were observed to reach 85+/-5 degrees C with a maximum temperature difference through the 150 microm thick solder strips of about 15 degrees C. Histological examination of the repairs formed using these parameters showed negligible evidence of collateral thermal damage to the underlying tissue. Scanning electron microscopy suggested albumin intertwining within the tissue collagen matrix and subsequent fusion with the collagen as the mechanism for laser tissue soldering. The laser tissue soldering technique is shown to be an effective method for producing repairs with improved tensile strength and minimal collateral thermal damage over conventional laser tissue welding techniques.
A hybrid random laser using dye with self-organized GaN nanorods
Publisher: IOP Publishing
Date: 22-12-2021
Abstract: Self-organized GaN nanorods with population densities ranging between 0.1 and 0.5 μ m −2 and average heights in the range 1.7–16.5 µ m, prepared by metal-organic chemical vapor deposition, were used as scattering centers for random lasing by incorporating Rhodamine 6G liquid dye solutions as the gain media. A lasing threshold as low as 11.3 J cm −2 was obtained from s les with nanorod density above 0.3 μ m −2 . The threshold depended on the nanorod density and diameter, but not the nanorod height. Lasing emission was observed at multiple angles, a clear indication of random lasing.
Synthesis and Characterization of Silver-Gold Bimetallic Nanoparticles for Random Lasing
Publisher: MDPI AG
Date: 11-02-2022
DOI: 10.3390/NANO12040607
Abstract: We developed rough silver-gold bimetallic nanoparticles for random lasing. Silver nanoparticles were synthesized based on a citrate-reduction method and the gold (III) chloride trihydrate was added to produce bimetallic nanoparticles. Gold atoms were deposited on the surface of the silver (Ag) through galvanic replacement reactions after the solution was stored at room temperature. S le characterization and a spectrometry experiment were performed where bimetallic nanoparticles with nanogaps and the extinction of the nanoparticles were observed. The aim of this research is to synthesize nanoparticles for random dye laser in a weakly scattering regime. The novel bimetallic nanoparticles were added to Rhodamine 640 solution to produce random lasing. We found that random dye laser with bimetallic nanoparticles produced spectral narrowing and lasing threshold compared to random dye laser with silver nanoparticles. We attribute that to the localized surface plasmon effects which increase local electromagnetic field to provide sufficient optical gain for random lasing. The rough surface of bimetallic nanoparticles also contributes to the properties of random lasing. Thus, we suggest that the rough bimetallic nanoparticles can be used to develop random lasers.
Thermal lens in laser-diode-pumped self-frequency-doubled Nd,Lu:YAl/sub 3/(BO/sub 3/)/sub 4/ laser with and without laser oscillations
Publisher: IEEE
Date: 1999
Reduction of spontaneous emission in tapered photonic crystal fibres
Publisher: IEEE
Date: 2005
Highly efficient diode-pumped ytterbium-doped yttrium aluminum borate laser
Publisher: Elsevier BV
Date: 02-2000
Growth of Yb-doped Ca 4 GdO(BO 3 ) 3 crystals and their spectra and laser properties
Publisher: Elsevier BV
Date: 2001
Laser based fabrication of micro and nano-structures using sacrificial layers
Publisher: Laser Institute of America
Date: 2004
DOI: 10.2351/1.5060314
The methylamine radical cation [CH3NH2]+˙ and its stable isomer the methylenammonium radical cation [CH2NH3]+˙
Publisher: Wiley
Date: 1983
Channel Waveguides in Lithium Niobate and Lithium Tantalate
Publisher: MDPI AG
Date: 17-07-2020
DOI: 10.20944/PREPRINTS202007.0382.V1
Abstract: Low-loss photonic waveguides in lithium niobate offer versatile functionality as nonlinear frequency converters, switches, and modulators for integrated optics. Combining the flexibility of laser processing with liquid phase epitaxy we have fabricated and characterized lithium niobate channel waveguides on lithium niobate and lithium tantalate. We used liquid phase epitaxy with K2O flux on laser-machined lithium niobate and lithium tantalate substrates. The laser-driven rapid-prototyping technique can be programmed to give machined features of various sizes, and liquid phase epitaxy produces high quality single-crystal, lithium niobate channels. The surface roughness of the lithium niobate channels on a lithium tantalate substrate was measured to be 90 nm. The lithium niobate channel waveguides exhibit propagation losses of 0.26 & lusmn 0.04 dB/mm at a wavelength of 633 nm. Second harmonic generation at 980 nm was demonstrated using the channel waveguides, indicating that these waveguides retain their nonlinear optical properties.
Liquid-Phase Epitaxial Growth and Characterization of Nd:YAl<sub>3</sub>(BO<sub>3</sub>)<sub>4</sub> Optical Waveguides
Publisher: MDPI AG
Date: 24-04-2021
DOI: 10.20944/PREPRINTS201901.0280.V1
Abstract: We investigated fabrication of neodymium doped thin film optical waveguide-based devices as potential active sources for planar integrated optics. Liquid-phase epitaxial growth was used to fabricate neodymium-doped yttrium aluminum borate films on compatible lattice-matched un-doped yttrium aluminum borate substrates. We observed the refractive index contrast of the doped and un-doped crystal layers by differential interference contrast microscopy. In addition, characterization by X-ray powder diffraction, optical absorption and luminescence spectra demonstrated the crystal quality and uniformity and optical guiding of the resulting thin films.& nbsp & nbsp
Spectroscopic and Structural Dynamics of MoS<sub>2</sub> Thin Films
Publisher: Trans Tech Publications, Ltd.
Date: 06-2019
DOI: 10.4028/WWW.SCIENTIFIC.NET/JNANOR.58.74
Abstract: A promising two-dimensional material for applications in optoelectronic and photonics, MoS 2 is in focus since last decade. Its optical, structural and electronic properties are of practical importance along with its exciton dynamics. MoS 2 thin films were synthesized with Chemical Vapour Deposition (CVD) technique on Si/SiO 2 substrates. The thickness dependent regularities were controlled and examined to quantitatively control the film quality with thickness variation. Various characterization techniques were employed to investigate structural and morphological changes induced systematically to reveal the van der waal stacked layers of MoS 2 material. The In-plane characteristic mode E 1 2g and out of plane A 1g vibrational modes were detected in different configurations of film’s structure. Optical absorption spectra gave us information on photon energy with the absorbance extrapolation of this curve gave optical bandgap (E g ) in the form of Tauc plot. These energies can be associated to interband electronic transitions in the Brillouin zone. The intrinsic excitonic response as a consequence of layer stacking and velly indexing can be attributed to this change in bandgap from 1.68 to 1.91 eV. Surface morphology of the as-grown films also provides better understanding of MoS 2 material with root mean square (RMS) roughness in the range of 1.32 to 3.85 nm.
Channel Waveguides in Lithium Niobate and Lithium Tantalate
Publisher: MDPI AG
Date: 27-08-2020
DOI: 10.3390/MOLECULES25173925
Abstract: Low-loss photonic waveguides in lithium niobate offer versatile functionality as nonlinear frequency converters, switches, and modulators for integrated optics. Combining the flexibility of laser processing with liquid phase epitaxy we have fabricated and characterized lithium niobate channel waveguides on lithium niobate and lithium tantalate. We used liquid phase epitaxy with K2O flux on laser-machined lithium niobate and lithium tantalate substrates. The laser-driven rapid-prototyping technique can be programmed to give machined features of various sizes, and liquid phase epitaxy produces high quality single-crystal, lithium niobate channels. The surface roughness of the lithium niobate channels on a lithium tantalate substrate was measured to be 90 nm. The lithium niobate channel waveguides exhibit propagation losses of 0.26 ± 0.04 dB/mm at a wavelength of 633 nm. Second harmonic generation at 980 nm was demonstrated using the channel waveguides, indicating that these waveguides retain their nonlinear optical properties.
Growth of Highly Yb-Doped Ca4GdO(BO3)3 Crystal and Its Laser Properties
Publisher: Wiley
Date: 2000
DOI: 10.1002/(SICI)1521-396X(200001)177:1<R1::AID-PSSA99991>3.0.CO;2-9
Growth and laser properties of laser crystal Nd:Gd0.8La0.2VO4
Publisher: Elsevier BV
Date: 10-1998
Insights from a systematic study of crosstalk in adiabatic couplers
Publisher: The Optical Society
Date: 28-02-2019
Ablation of dental enamel using subpicosecond pulsed lasers
Publisher: Elsevier BV
Date: 05-2003
Thermal-lens measurement of a quasi steady-state repetitively flashlamp-pumped Cr, Tm, Ho:YAG laser
Publisher: Elsevier BV
Date: 03-1998
Fibre Bragg grating stopband profile trade-off for temporal spectral astronomy
Publisher: IEEE
Date: 05-2011
Energy-transfer studies and efficient cw laser operation of a cw Er,Yb:YCOB laser at 1.55 μm
Publisher: SPIE
Date: 18-06-2003
DOI: 10.1117/12.501641
Self-Frequency-Doubling Ytterbium Lasers
Publisher: Springer Science and Business Media LLC
Date: 03-2005
Self-assembly around curved surfaces
Publisher: SPIE
Date: 21-12-2007
DOI: 10.1117/12.769338
Femtosecond laser modification of fused silica
Publisher: Optica Publishing Group
Date: 20-11-2008
DOI: 10.1364/OE.16.020029
Abstract: A femtosecond laser with a 1 kHz repetition rate and two different polarization states was used to fabricate low-loss waveguides in fused silica. Investigations of chemically-mechanically polished waveguide regions using near-field scanning optical microscopy revealed the presence of modifications outside the glass regions directly exposed to a circularly polarized writing laser. These waveguides also exhibited refractive index contrast up to twice as large as that of waveguides written with linearly polarized radiation. The observed differences in refractive index were shown by Raman spectroscopy to correlate to an increased concentration of 3-member silicon-oxygen ring structures. We propose that the observed differences in material properties are due to the polarization dependence of photo-ionization rates in fused silica.
Extended emission wavelength of random dye lasers by exploiting radiative and non-radiative energy transfer
Publisher: Springer Science and Business Media LLC
Date: 02-2016
Growth and characterization of lithium niobate planar waveguides by liquid phase epitaxy
Publisher: Elsevier BV
Date: 02-2009
<title>Laser-activated protein bands for peripheral nerve repair</title>
Publisher: SPIE
Date: 19-01-1996
DOI: 10.1117/12.230350
Energy transfer and investigation into laser performance in Er3+,Yb3+:YCOB crystals at 1.5-1.6 µm
Publisher: OSA
Date: 2001
Direct-write nanosecond laser microstructuring of heat shrinkable films
Publisher: Springer Science and Business Media LLC
Date: 12-11-2005
Crystal Characterization and “Natural Quasi-Phase Matching” in Nd-and Yb:YAB
Publisher: OSA
Date: 2005
Growth, Stark energy level and laser properties of Yb:Ca4YO(Bo3)3 crystal
Publisher: Elsevier BV
Date: 03-2000
Tuning higher order electric field resonances in plasmonic hexagonal arrays by oxygen-plasma treatment
Publisher: Springer Science and Business Media LLC
Date: 26-04-2021
Cavity modes in diode-array end-pumped planar lasers with aberrated thermal lenses
Publisher: Elsevier BV
Date: 12-2000
Overview of laser microfabrication techniques for photonic devices
Publisher: IEEE
Date: 07-2008
The properties of ion-implanted InGaAs single quantum-well semiconductor saturable absorber mirrors for passive mode-locking
Publisher: IEEE
Date: 2001
Liquid-Phase Epitaxial Growth and Characterization of Nd:YAl3(BO3)4 Optical Waveguides
Publisher: MDPI AG
Date: 02-2019
DOI: 10.3390/CRYST9020079
Abstract: We investigated the fabrication of neodymium doped thin film optical waveguide-based devices as potential active sources for planar integrated optics. Liquid-phase epitaxial growth was used to fabricate neodymium-doped yttrium aluminum borate films on compatible lattice-matched, un-doped yttrium aluminum borate substrates. We observed the refractive index contrast of the doped and un-doped crystal layers via differential interference contrast microscopy. In addition, characterization by X-ray powder diffraction, optical absorption and luminescence spectra demonstrated the crystal quality, uniformity and optical guiding of the resulting thin films.
Electron trapping in quantum-well structures
Publisher: American Physical Society (APS)
Date: 15-12-1987
Dynamic Optical Strain Sensing
Publisher: Optica Publishing Group
Date: 2020
DOI: 10.1364/CLEOPR.2020.P3_23
Abstract: We demonstrated a dynamic strain sensor consisting of a flexible polydimethylsiloxane film patterned by a self-assembled array of polystyrene beads. The time-response of the diffracted light was monitored as the film was stretched.
Growth, Morphology and Characterization of Yb : YVO4 Crystal
Publisher: Wiley
Date: 10-1999
DOI: 10.1002/(SICI)1521-396X(199910)175:2<705::AID-PSSA705>3.0.CO;2-N
Optical and thermal characterization of albumin protein solders
Publisher: Optica Publishing Group
Date: 11-1999
DOI: 10.1364/AO.38.006661
Abstract: The effect of temperature on the optical and thermal properties of pure and indocyanine green-doped albumin protein solders as a function of wavelength has been studied between 25 degrees C and 100 degrees C. An increase in the group refractive index by up to 4% and a decrease in absorption coefficient (approximately 800 nm) by up to 8%, after denaturing the solder specimens in a constant-temperature water bath at temperatures of 60-100 degrees C, were not significant. The reduced scattering coefficient, however, increased rapidly with temperature as the solder changed from being a highly nonscattering medium at room temperature to a highly scattering medium at temperatures close to 70 degrees C. The thermal conductivity, thermal diffusivity, and heat capacity increased by up to 30%, 15%, and 10%, respectively. Finally, the frequency factor and activation energy were measured to be 3.17 x 10(56) s(-1) and 3.79 x 10(5) J mol(-1), respectively, for liquid protein solders (25% bovine serum albumin) and 3.50 x 10(57) s(-1) and 3.85 x 10(5) J mol(-1), respectively, for solid protein solders (60% bovine serum albumin). Incorporation of dynamic optical and thermal properties into modeling studies of laser tissue interactions could have a significant influence on the determination of the expected zone of damage.
Dual-polarization frequency-modulated laser source
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 08-1996
DOI: 10.1109/68.508722
Investigation on growth and laser properties of new laser crystal Nd:Gd0.8La0,2VO4
Publisher: Springer Science and Business Media LLC
Date: 05-1999
DOI: 10.1007/BF02885040
Growth and laser properties of Yb:Ca4YO(BO3)3 crystal
Publisher: Elsevier BV
Date: 04-1999
Focusing surface plasmons by a plasmonic lens
Publisher: SPIE
Date: 10-09-2014
DOI: 10.1117/12.2060618
Relative contributions of scattering, diffraction and modal diffusion to focal ratio degradation in optical fibres
Publisher: Oxford University Press (OUP)
Date: 22-03-2011
Twinning and “natural quasi-phase matching” in Yb:YAB
Publisher: Springer Science and Business Media LLC
Date: 29-03-2006
Graphene photo-detector enhanced by plasmonic coupling
Publisher: IEEE
Date: 07-2017
Spectral characterization and Laser operation of Er3+:Yb3+:YCOB crystals at 1.5~1.6 µm
Publisher: Optica Publishing Group
Date: 2000
Abstract: 2 at.% Er and 20 at.% Yb crystalline co-doped Er:Yb:YCOB has been grown and characterized. Polarized absorption spectra and fluorescence spectra were measured and gain cross sections were calculated. The data show that Er:Yb:YCOB is a promising material for laser emission in the favorable wavelength range of 1546-1570nm for practical applications. Laser emission at 1554nm has been obtained for the first time, using a 976nm diode pump source.
Slope efficiency of up to 73% for Yb:Ca 4 YO(BO 3 ) 3 crystal laser pumped by a laser diode
Publisher: Springer Science and Business Media LLC
Date: 06-1999
Plasmon resonance of spherical and ellipsoidal gold particles in hexagonal-plasmonic arrays
Publisher: SPIE
Date: 11-03-2020
DOI: 10.1117/12.2552985
Manipulation of spontaneous emission in a tapered photonic crystal fibre
Publisher: Optica Publishing Group
Date: 11-12-2006
DOI: 10.1364/OE.14.012439
Abstract: We characterize the spontaneous emission of dye that is introduced into the central core of a tapered photonic crystal fiber. Since the photonic crystal period in the fibre cladding varies along the taper, the transmission and spontaneous emission spectra over a wide range of relative frequencies can be observed. The spontaneous emission spectra of the fibre transverse to the fiber axis show suppression due to partial band-gaps of the structure, and also enhancement of spontaneous emission near the band edges. We associate these with van Hove features, as well as finite cluster size effects.
Optical response of inverse opal-like structures prepared from titanium dioxide with copper and nickel dopants
Publisher: Elsevier BV
Date: 2021
Atom recombination in dense gases and fluids-a stochastic model
Publisher: Elsevier BV
Date: 02-1985
Lifetime-Engineered Ruby Nanoparticles (Tau-Rubies) for Multiplexed Imaging of μ-Opioid Receptors
Publisher: American Chemical Society (ACS)
Date: 04-03-2021
Emission control of NV centers embedded in an opal photonic crystal
Publisher: OSA
Date: 2009
Nanophotonics shines light on hyperbolic metamaterials
Publisher: Springer Science and Business Media LLC
Date: 10-01-2022
DOI: 10.1038/S41377-021-00688-2
Abstract: Hyperbolic metamaterials with a unique hyperbolic dispersion relation allow propagating waves with infinitely large wavevectors and a high density of states. Researchers from Korea and Singapore provide a comprehensive review of hyperbolic metamaterials, including artificially structured hyperbolic media and natural hyperbolic materials. They explain key nanophotonic concepts and describe a range of applications for these versatile materials.
Q-switching of a diode-pumped Nd: YAG laser with low uniform gain characteristics
Publisher: Elsevier BV
Date: 04-1995
Investigations on the Growth and Laser Properties of Nd:GdVO4 Single Crystal
Publisher: Wiley
Date: 1998
DOI: 10.1002/(SICI)1521-4079(1998)33:5<801::AID-CRAT801>3.0.CO;2-C
Enhancement of emission due to local density of states (LDOS) effects in 2-D photonic crystal tapered optical fibre
Publisher: IEEE
Date: 2006
Web-based photonics simulator for secondary school students
Publisher: SPIE
Date: 05-06-2009
DOI: 10.1117/12.2207975
Direct writing of planar lightwave devices using ultrafast lasers
Publisher: IEEE
Date: 06-2007
Dynamic optical-thermal modeling of laser tissue soldering with a scanning source
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 1999
DOI: 10.1109/2944.796332
Optical spectra of periodically patterned dielectric surface simulated by finite-different time-domain method
Publisher: IOP Publishing
Date: 11-2019
DOI: 10.1088/1742-6596/1380/1/012151
Abstract: A dielectric film imprinted with a hexagonal periodical pattern of nanosphere holes can be fabricated by a two-step process of depositing a dielectric thin film on a hexagonally patterned array of nanospheres fabricated by convective deposition, and then removing the nanosphere particles. In this work, the optical transmission through a dielectric slab with hexagonal pattern of half-sphere holes was simulated by finite-different time-domain (FDTD) methods. In the simulation, a short gaussian pulse of electromagnetic waves was generated and propagated through the dielectric patterned slab and the near-field diffraction from the structure was collected as a function of time. Using a Fourier transformation, the optical spectra of the structure were evaluated. The far-field diffraction was also investigated by evaluating the analytical Green’s function at given points. Several parameters of the optical response including full width at half maximum and relative intensities of high order diffraction peaks were examined for various structure sizes. The structures examined were composed of a periodic hexagonal pattern of half nanosphere holes (radius of 290 nm). In addition, the effect on the optical response of 10% elliptical shape deformation of the half-sphere holes was studied. Our calculations enable us to identify parameter schemes where the third order diffraction exceeds second order diffraction efficiency from gratings.
Laser-activated solid protein bands for peripheral nerve repair: An in vivo study
Publisher: Wiley
Date: 1997
DOI: 10.1002/(SICI)1096-9101(1997)21:2<134::AID-LSM4>3.0.CO;2-R
Abstract: Severed tibial nerves in rats were repaired using a novel technique, utilizing a semiconductor diode-laser-activated protein solder applied longitudinally across the join. Welding was produced by selective laser denaturation of solid solder bands containing the dye indocyanine green. An in vivo study, using 48 adult male Wistar rats, compared conventional microsuture-repaired tibial nerves with laser solder-repaired nerves. Nerve repairs were characterised immediately after surgery and after 3 months. Successful regeneration with average compound muscle action potentials of 2.5 +/- 0.5 mV and 2.7 +/- 0.3 mV (mean and standard deviation) was demonstrated for the laser-soldered nerves and the sutured nerves, respectively. Histopathology confirmed comparable regeneration of axons in laser- and suture-operated nerves. The laser-based nerve repair technique was easier and faster than microsuture repair, minimising manipulation damage to the nerve.
Iodine geminate recombination: On the role of shallow and deep traps
Publisher: Elsevier BV
Date: 06-1985
CW diode-pumped microlaser operation at 1.5-1.6 μm in Er,Yb:YCOB
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 12-2002
Diode Laser Activated Protein Solder for Sutureless Microsurgical Repair of Blood Vessels
Publisher: IEEE
Date: 1998
Investigation of surface plasmon amplification in finite-width gold stripline based on Nd:YVO4 crystal
Publisher: OSA
Date: 2013
Towards Robust Lidar-based 3D Detection and Tracking of UAVs
Publisher: ACM
Date: 18-06-2023
Influence of laser action on thermal loading in diode-pumped Nd:YVO4
Publisher: OSA
Date: 1999
Optical and Electronic Properties of Diatoms
Publisher: OSA
Date: 2007
Focal ratio degradation: A new perspective
Publisher: SPIE
Date: 14-07-2008
DOI: 10.1117/12.788735
Plasmonic enhancement of coherence in random lasers
Publisher: IEEE
Date: 02-2014
Radiation dynamics in tapered photonic crystal fibres
Publisher: IEEE
Date: 2005
Properties of Random Lasers in a hollow core photonic crystal fiber
Publisher: IOP Publishing
Date: 07-02-2020
Plasmonic enhancement of Rhodamine dye random lasers
Publisher: IOP Publishing
Date: 08-07-2015
Characterisation of nonlinear conversion and crystal quality in Nd- and Yb-doped YAB
Publisher: Optica Publishing Group
Date: 2004
Abstract: Variable crystal quality affects the laser performance of many self-frequency doubling crystals, particularly those of the yttrium aluminum borate family. In this report we characterize nonlinear frequency conversion in Yb:YAB and demonstrate a simple non-destructive technique for measuring crystal quality. By imaging the nonlinear conversion using a CCD camera we observe phase matching characteristics similar to that obtained in quasi-phase-matched crystals. These effects are attributed to stacking faults in the structure of the YAB crystal during crystal growth. We believe that such defects cause the large variability in self-doubled performance reported for Nd- or Yb-doped YAB and that our technique may be used as a nondestructive measurement of crystal quality.
Characterisation of Emission Lifetime of Nitrogen-Vacancy Centres in Nanodiamonds
Publisher: OSA
Date: 2010
Passively mode-locked, self-frequency doubled, diode-pumped Yb: YAl3(BO3)4 laser
Publisher: Optica Publishing Group
Date: 2002
Abstract: The broad fluorescence of Ytterbium doped lasers allows tunability and/or subpicosecond pulse generation at wavelengths around 1040nm. Also, the small quantum defect ( .1) and high quantum efficiency reduce the thermal load. The simple energy level scheme of the Yb ion minimizes undesirable effects such as upconversion, excitedstate absorption and concentration quenching and is particularly suited to intracavity frequency-doubled lasers. As a result there is a growing range of mode-locked Yb 3+ -doped lasers, including the 40mW, 90fs pulses from a Yb 3+ :Ca 4 GdO(BO 3 ) 3 laser 1 as well as the 200mW, 112fs pulses from a Yb 3+ :KGd(WO 4 ) 2 laser 2 . In particular, Yb:YAl 3 (BO 3 ) 4 (Yb: YAB) has a large second-order nonlinearity (d eff .4pm/V) and favorable laser properties making it well suited to visible subpicosecond pulse generation. CW and Q-switched Yb:YAB lasers3,4 have previously been demonstrated with 1.1W of green output.
Upconversion luminescence with tunable lifetime in NaYF4:Yb,Er nanocrystals: role of nanocrystal size
Publisher: Royal Society of Chemistry (RSC)
Date: 2013
DOI: 10.1039/C2NR32482B
Abstract: Despite recent achievements to reduce surface quenching in NaYF(4):Yb,Er nanocrystals, a complete understanding of how the nanocrystal size affects the brightness of upconversion luminescence is still incomplete. Here we investigated upconversion luminescence of Yb,Er-doped nanocrystals in a broad range of sizes from 6 nm to 45 nm (cubic or hexagonal phases), displaying an increasing red-to-green luminescence intensity ratio and reduced luminescence lifetimes with decreasing size. By analyzing the upconversion process with a set of rate equations, we found that their asymptotic analytic solutions explain lower decay rates of red compared to green upconversion luminescence. Furthermore, we quantified the effect of the surface on luminescence lifetime in a model where nanocrystal emitters are ided between the near-surface and inside regions of each nanocrystal. We clarify the influence of the four nonradiative recombination mechanisms (intrinsic phonon modes, vibration energy of surface ligands, solvent-mediated quenching, and surface defects) on the decay rates for different-size nanocrystals, and find that the defect density dominates decay rates for small (below 15 nm) nanocrystals. Our results indicate that a defect-reduction strategy is a key step in producing small upconversion nanocrystals with increased brightness for a variety of bioimaging and biosensing applications.
Dye‐assisted diode laser ablation of carious enamel and dentine
Publisher: Wiley
Date: 09-1999
DOI: 10.1111/J.1834-7819.1999.TB00218.X
Abstract: Carious dentine and enamel from extracted human teeth were ablated using a semiconductor diode laser in conjunction with an applied dye, indocyanine green. This technique offers selective ablation with minimal risk of thermal damage to surrounding dental tissues because uptake of the dye and its irradiation by the laser together control the ablation. In this study, various laser powers and dye concentrations were used to ablate previously extracted human teeth with moderate caries. The mass of material ablated and the temperature rise in the pulp and at the surface were recorded, and the ablated surface was examined by microscopy. The ablation was efficient and the rise in the pulp temperature slight. Ablation efficiency and surface temperature were both found to increase with laser irradiance and with dye concentration. No surface cracks or fissures were seen in electron microscope examination and the hardness of the laser-treated surfaces was comparable to that of healthy tissue. The dye-assisted laser ablation technique offers considerable potential for clinical caries removal and dentine, enamel and pulp sterilization, whilst leaving healthy tissue intact. The diode laser can deliver its energy via simple optical fibre and is cheaper and much smaller than the conventional high power lasers used in other studies.
1.1 W CW self-frequency-doubled diode-pumped Yb:YAl3(BO3)4 laser
Publisher: Elsevier BV
Date: 08-2001
Heat generation in Nd:YVO4 with and without laser action
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 12-1998
DOI: 10.1109/68.730483
227-W Q-switched self-doubling Yb:YAB laser with controllable pulse length
Publisher: Optica Publishing Group
Date: 02-2005
Reply
Publisher: Wiley
Date: 1998
DOI: 10.1002/(SICI)1096-9101(1998)22:4<192::AID-LSM2>3.0.CO;2-K
Point-by-point inscription of narrow-band gratings in polymer ridge waveguides
Publisher: Springer Science and Business Media LLC
Date: 02-09-2008
Laser nerve repair by solid protein band technique. I: Identification of optimal laser dose, power, and solder surface area
Publisher: Wiley
Date: 1998
DOI: 10.1002/(SICI)1098-2752(1998)18:1<55::AID-MICR12>3.0.CO;2-R
Abstract: Thirty-four tibial nerves in 17 adult male wistar rats were repaired by applying protein bands longitudinally across the nerve join. The bands were then irradiated with a fibre-coupled diode laser (lambda = 810 nm). The relations among the laser weld breaking force, the power, and the solder surface area were investigated, while maintaining a consistent ratio between the total mass of protein solder in a band and total laser energy delivered (the laser energy dose). When this laser energy dose was held constant, the average breaking force of the laser welds irradiated by 72 mW laser output power was weaker than that reached after 90 mW laser radiation. There is a linear relation between the solder breaking force and the solder surface area when band thickness, laser power, and laser dose are unvaried.
Diode-pumped cw tunable Er 3+ :Yb 3+ :YCOB laser at 1.5-1.6 μm
Publisher: Elsevier BV
Date: 05-2002
Digital waveguide adiabatic passage part 2: experiment
Publisher: The Optical Society
Date: 02-2017
DOI: 10.1364/OE.25.002552
Plasmonic Effect on Performance of Random Lasers
Publisher: American Scientific Publishers
Date: 03-2018
Thermal and laser properties of Yb:YAl3(BO3)4 crystal
Publisher: Elsevier BV
Date: 04-2003
Characterisation of fs-laser written refractive index changes using near-field scanning optical microscopy
Publisher: SPIE
Date: 21-12-2008
DOI: 10.1117/12.761087
Enhancement of Random Laser Properties on Solid Polymer Films by Increasing Scattering Effect
Publisher: Springer Science and Business Media LLC
Date: 07-2019
A Random Laser Based on Hybrid Fluorescent Dye and Diamond Nanoneedles
Publisher: Wiley
Date: 29-10-2018
Fabrication of photonic devices using novel laser assisted methods
Publisher: SPIE
Date: 25-03-2004
DOI: 10.1117/12.524399
Polarization dependence of photo-ionization in glasses and applications to direct-write photonics
Publisher: OSA
Date: 2009
Investigation of femtosecond laser induced thermal ablation of polyethylene
Publisher: Laser Institute of America
Date: 18-07-2008
DOI: 10.2351/1.2955561
Abstract: We present a novel method for profiling high aspect ratio and undercut laser drilled holes using sacrificial layers. This profiling method is used to compare and contrast laser ablation of polyethylene films under exposure to ultraviolet (266 nm) and near-infrared (800 nm) radiation from an ultrafast, femtosecond laser. We find that ultraviolet femtosecond pulsed laser processing of this polymer exhibits similar characteristics to that reported for nanosecond pulsed excimer lasers namely, that thermal ablation contributes to material removal at high fluences. In addition, the total volume of material removed via IR femtosecond laser ablation is shown to be up to 4 times that for UV femtosecond laser ablation at a similar fluence and low pulse repetition frequency.
Photocurrent enhancement of graphene photodetectors by photon tunneling of light into surface plasmons
Publisher: IOP Publishing
Date: 18-09-2017
Continuous wave and Q-switched diode-pumped neodymium, lutetium: yttrium aluminium borate lasers
Publisher: Elsevier BV
Date: 06-1998
<title>Laser-dye ablation technique for removal of carious dentin and enamel</title>
Publisher: SPIE
Date: 15-05-1997
DOI: 10.1117/12.273601
Bimolecular reactions on surfaces. Theory for arbitrary mean free path and interaction potential
Publisher: AIP Publishing
Date: 05-1988
DOI: 10.1063/1.454560
Abstract: The bimolecular reaction rate of molecules constrained to a surface is obtained in a simple form. The solution applies for any central force potential and for arbitrary mean free path, giving in the limit of high friction the solution to the diffusion equation with its logarithmic dependence on surface density and in the limit of low friction the result of canonical variational transition state theory.
Laser-solder repair technique for nerve anastomosis: Temperatures required for optimal tensile strength
Publisher: SPIE
Date: 14-01-1997
DOI: 10.1117/12.297913
Subpicosecond and picosecond laser ablation of dental enamel: comparative analysis
Publisher: SPIE
Date: 06-2004
DOI: 10.1117/12.538835
Practical Implementation, Characterization and Applications of a Multi-Colour Time-Gated Luminescence Microscope
Publisher: Springer Science and Business Media LLC
Date: 13-10-2014
DOI: 10.1038/SREP06597
Abstract: Time-gated luminescence microscopy using long-lifetime molecular probes can effectively eliminate autofluorescence to enable high contrast imaging. Here we investigate a new strategy of time-gated imaging for simultaneous visualisation of multiple species of microorganisms stained with long-lived complexes under low-background conditions. This is realized by imaging two pathogenic organisms ( Giardia lamblia stained with a red europium probe and Cryptosporidium parvum with a green terbium probe) at UV wavelengths (320–400 nm) through synchronization of a flash l with high repetition rate (1 kHz) to a robust time-gating detection unit. This approach provides four times enhancement in signal-to-background ratio over non-time-gated imaging, while the average signal intensity also increases six-fold compared with that under UV LED excitation. The high sensitivity is further confirmed by imaging the single europium-doped Y 2 O 2 S nanocrystals (150 nm). We report technical details regarding the time-gating detection unit and demonstrate its compatibility with commercial epi-fluorescence microscopes, providing a valuable and convenient addition to standard laboratory equipment.
Synthesis, characterization, and applications of opals
Publisher: Elsevier
Date: 2020
Thermal conductivity of a self-frequency-doubling laser crystal measured by use of optical methods
Publisher: Optica Publishing Group
Date: 20-03-2001
DOI: 10.1364/AO.40.001372
Abstract: We present a new all-optical technique to measure the thermal conductivity of laser crystals. This technique can be used for crystals that are too small for direct measurement of thermal conductivity. We used this technique to measure the thermal conductivities of Nd:LYAB, with the result of 44 +/- 6% compared with that of Nd:YAG thermal conductivity.
Quantifying light energy from 450 nm, 650 nm, 810 nm, and 980 nm wavelength lasers delivered through dental hard tissue
Publisher: Springer Science and Business Media LLC
Date: 26-04-2022
DOI: 10.1007/S41547-022-00154-1
Abstract: The energy available to treat the dental pulp after transmittance through overlying structures is clinically important for determining photobiological effects. This ex vivo study aimed to quantify laser energy delivery though the dental crown to the pulp from an initial energy of 5 J using four common laser wavelengths ( λ = 450, 650, 810, and 980 nm). A total of 30 extracted healthy human teeth (anterior n = 10 premolar n = 10 molar n = 10) were longitudinally sectioned (Project Number: 2021/421, University of Sydney, NSW, Australia). Each s le was methodically exposed in random order to the four wavelengths. Each wavelength was operated at the same power (0.50 W) for 10 s to deliver 5.0 J with a total energy delivery of 10 J/cm 2 . Laser light was delivered with an 8-mm-diameter fiber bundle probe directed perpendicularly to the buccal cervical-third of the crown. The transmitted energy was measured twice and averaged using a periodically pre-calibrated power meter in blinded conditions. Data were analyzed using a general linear model with logarithmic transformation. Wavelength and tooth thickness were significant predictors of optical transmittance ( P 0.05) while tooth type was significant only for the 450 nm wavelength. The average attenuation coefficients ( µ ) were 2.55, 2.45, 1.87, and 5.42 cm −1 (± 10%) for the 980, 810, 650, and 450 nm groups, respectively. Clinicians should recognize that significant attenuation occurs during laser energy delivery to the pulp, influenced by the wavelength, thickness, and tooth type. Our findings support the potential for laser energy delivery to the pulp for photobiomodulation applications.
The nanoanatomical basis of sexual dimorphism in iridescent butterfly colouration
Publisher: CSIRO Publishing
Date: 2012
DOI: 10.1071/ZO12045
Abstract: Structurally generated colours are at least as commonplace and varied components of animal signals as pigment colours, yet we know far less about the former, both in terms of the patterns and phenotypic variation and of their underlying correlates and causes. Many butterflies exhibit bright and iridescent colour signals that arise from a characteristic ‘ridge-lamellar’ scale surface nanoarchitecture. Although there are multiple axes of functional variation in these traits, few have been investigated. Here we present evidence that sexual dimorphism in the expression of a sexually homologous ridge-lamellar trait (iridescent ultraviolet) is mediated by sex differences in the density of lamellar-bearing scale ridges. This trait – ridge density – has also been causally related to iridescent signal variation in other coliadines (e.g. C. eurytheme), which suggests that it may offer a common basis to both intra- and intersexual differences in ultraviolet wing reflectance among these butterflies.
Characterization of the influence of crystal size and dipole orientation on the spontaneous emission lifetime of diamond NV colour centers
Publisher: IEEE
Date: 08-2011
A high repetition rate pico-synchronous Nd:YAG laser
Publisher: Elsevier BV
Date: 02-1988
Ruby-nanocrystal-enhanced random dye lasers
Publisher: OSA
Date: 2015
Photonic Bandgap Guiding in an Opal Clad Fibre
Publisher: IEEE
Date: 06-2007
Methane detection with a narrow-band source at 34 μm based on a Nd:YAG pump laser and a combination of stimulated Raman scattering and difference frequency mixing
Publisher: Optica Publishing Group
Date: 20-07-1996
DOI: 10.1364/AO.35.004041
Optimal parameters for laser tissue soldering: II. Premixed versus separate dye-solder techniques
Publisher: Wiley
Date: 2000
DOI: 10.1002/(SICI)1096-9101(2000)26:4<346::AID-LSM2>3.0.CO;2-V
Abstract: Laser tissue soldering by using an indocyanine green (ICG)-doped protein solder applied topically to the tissue surface and denatured with a diode laser was investigated in Part I of this study. The depth of light absorption was predominantly determined by the concentration of the ICG dye added to the solder. This study builds on that work with an in vitro investigation of the effects of limiting the zone of heat generation to the solder-tissue interface to determine whether more stable solder-tissue fusion can be achieved. An alternative laser tissue soldering technique was investigated, which increased light absorption at the vital solder-tissue interface. A thin layer of ICG dye was smeared over the surface to be treated, the protein solder was then placed directly on top of the dye, and the solder was denatured with an 808-nm diode laser. Because laser light at approximately 800 nm is absorbed primarily by the ICG dye, this thin layer of ICG solution restricted the heat source to the space between the solder and the tissue surfaces. A tensile strength analysis was conducted to compare the separate dye-solder technique with conventional techniques of laser tissue soldering for which a premixed dye-solder is applied directly to the tissue surface. The effect of hydration on bond stability of repairs formed by using both techniques was also investigated using tensile strength and scanning electron microscopy analysis. Equivalent results in terms of tensile strength were obtained for the premixed dye-solder technique using protein solders containing 0.25 mg/ml ICG (liquid solder, 220 +/- 35 N/cm(2) solid solder, 602 +/- 32 N/cm(2)) and for the separate dye-solder technique (liquid solder, 228 +/- 41 N/cm(2) solid solder, 578 +/- 29 N/cm(2)). The tensile strength of native bovine thoracic aorta was 596 +/- 31 N/cm(2). Repairs created by using the separate dye-solder technique were more stable during hydration than their premixed dye-solder counterparts. The conventional premixed dye-solder was simpler and approximately twice as fast to apply. The separate dye-solder technique, however, increased the shelf-life of the solder, because the dye was mixed at the time of the experiment, thus conserving its spectral absorbency properties. Two laser-assisted tissue soldering techniques have been evaluated for repairing aorta incisions in vitro. The advantages and disadvantages of each of these techniques are discussed.
Centre for Lasers and Applications
Publisher: IEEE
Date: 2005
Mechanisms of size-dependent lifetime quenching in luminescent upconverting colloidal NaYF 4 :Yb, Er nanocrystals
Publisher: IEEE
Date: 08-2011
Fluorescence resonance energy transfer (FRET) in random dye lasers
Publisher: IEEE
Date: 08-2015
Random Laser in a Fibre: Guiding and Scattering Contribute to Reduced Threshold
Publisher: OSA
Date: 2016
Curved Gratings as Plasmonic Lenses for Linearly Polarised Light
Publisher: Springer Science and Business Media LLC
Date: 25-08-2015
Modification of spontaneous emission from nanodiamond colour centres on a structured surface
Publisher: IOP Publishing
Date: 11-07-2011
Characterisation of Upconversion Nanoparticles for Imaging
Publisher: OSA
Date: 2013
Sutureless Microvascular Anastomoses by a Biodegradable Laser-Activated Solid Protein Solder
Publisher: Ovid Technologies (Wolters Kluwer Health)
Date: 11-1999
DOI: 10.1097/00006534-199911000-00017
Abstract: A new sutureless technique to successfully anastomose the abdominal aorta of rats (1.3 mm in diameter) by using a fully biodegradable, laser-activated protein solder is presented. A total of 90 rats were ided into two groups randomly. In group one, the anastomoses were performed by using conventional microsuturing technique, whereas in group two, the anastomoses were performed by using a new laser welding technique. In addition, each of the two groups were ided into five subgroups and evaluated at different follow-up periods (10 minutes, 1 hour, 1 day, 1 week, and 6 weeks). At these intervals, the anastomoses were evaluated for patency and tensile strength. Three anastomoses in each subgroup were processed for light and electron microscopy. All anastomoses were found to be patent. The mean cl time of the anastomoses performed with conventional suturing was 20.6 minutes compared with 7.2 minutes for the laser-activated welded anastomoses (p < 0.001). The strain measurements showed a stronger mechanical bond of the sutured anastomoses in the initial phase. However, at 6 weeks the tensile strength of the laser-welded anastomoses was higher compared with the conventional suture technique. Histologic evaluations revealed a near complete resorption of the solder after 6 weeks. The junction site of the vessel ends cannot be determined on the luminal side of the artery. In conclusion, a resorbable protein used as a solder, activated by a diode laser, can provide a reliable, safe, and rapid arterial anastomosis, which could be performed by any microsurgeon faster than conventional suturing after a short learning curve.
Random laser in a fiber: combined effects of guiding and scattering lead to a reduction of the emission threshold
Publisher: Portico
Date: 26-09-2017
Abstract: Random fiber lasers incorporate scattering particles with optical gain in a fiber geometry and offer potential for sensing and biophotonics applications. In this work, the combined effects of waveguiding and scattering in random fiber lasers were investigated. A dye solution with nanoparticles was inffltrated into the hollow core of the microstructured optical fibers and the fibers were side pumped by a frequency-doubled Nd:YAG laser. The resulting emission threshold was reduced in comparison with the bulk solution.We used a Matlab model to gain a better understanding of the competing feedback mechanisms involved.
Growth, spectroscopic properties and laser output of Er:Ca 4 YO(BO 3 ) 3 and Er:Yb:Ca 4 YO(BO 3 ) 3 crystals
Publisher: Elsevier BV
Date: 09-2000
Single-nanocrystal sensitivity achieved by enhanced upconversion luminescence
Publisher: Springer Science and Business Media LLC
Date: 09-2013
Abstract: Upconversion nanocrystals convert infrared radiation to visible luminescence, and are promising for applications in biodetection, bioimaging, solar cells and three-dimensional display technologies. Although the design of suitable nanocrystals has improved the performance of upconversion nanocrystals, their emission brightness is limited by the low doping concentration of activator ions needed to avoid the luminescence quenching that occurs at high concentrations. Here, we demonstrate that high excitation irradiance can alleviate concentration quenching in upconversion luminescence when combined with higher activator concentration, which can be increased from 0.5 mol% to 8 mol% Tm(3+) in NaYF₄. This leads to significantly enhanced luminescence signals, by up to a factor of 70. By using such bright nanocrystals, we demonstrate remote tracking of a single nanocrystal with a microstructured optical-fibre dip sensor. This represents a sensitivity improvement of three orders of magnitude over benchmark nanocrystals such as quantum dots.
Optimal parameters for laser tissue soldering. Part I: Tensile strength and scanning electron microscopy analysis
Publisher: Wiley
Date: 1999
DOI: 10.1002/(SICI)1096-9101(1999)24:5<319::AID-LSM2>3.0.CO;2-N
Abstract: The use of liquid and solid albumin protein solders to enhance laser tissue repairs has been shown to significantly improve postoperative results. The published results of laser-solder tissue repair studies have, however, indicated inconsistent success rates. This can be attributed to variations in laser irradiance, exposure time, solder composition, chromophore type, and concentration. An in vitro study was performed using indocyanine green-doped albumin protein solders in conjunction with an 808 nm diode laser to determine optimal laser and solder parameters for tissue repair in terms of tensile strength and stability during hydration. Twenty-five different combinations of laser irradiance (6.4, 12.7, 19.1, 25.5, 31.8 W/cm2) and exposure time (20, 30, 40, 50, 100 or 40, 60, 80, 100, 200 seconds) were used. The effect of changing bovine serum albumin (BSA) concentration (25% and 60%) and indocyanine green (ICG) dye concentration (2.5 mg/ml and 0.25 mg/ml) of the protein solder on the tensile strength of the resulting bonds was investigated. The effect of hydration on bond stability was also investigated using both tensile strength and scanning electron microscopy analysis. Tensile strength was observed to decrease significantly with increasing irradiance. An optimum exposure time was found to exist where further irradiation did not improve the tensile strength of the bond. Tensile strength was found to be greatly improved by increasing the BSA concentration. Finally, the lower ICG dye concentration increased the penetration depth of the laser light in the protein solder leading to higher tensile strengths. The strongest repairs were formed by using 6.4 W/cm2 irradiation for 50 seconds with a protein solder composed of 60% BSA and 0.25mg/ml ICG. In addition, the solid protein solder provided more stable adhesion to the tissue than did the liquid protein solder when the tissue was submerged in a hydrated environment. This study greatly enhances the current understanding of the various factors affecting the soldering process. It provides a strong basis for optimization of the laser light delivery parameters and the solder constituents to achieve strong and reliable laser tissue repairs.
Spectral and coherence signatures of threshold in random lasers
Publisher: IOP Publishing
Date: 04-09-2014
A pulsed laser source using stimulated Raman scattering and difference frequency mixing: Remote sensing of methane in air
Publisher: Elsevier BV
Date: 11-1995
Second Harmonic Generation in Lithium Niobate Planar Waveguides Grown by Liquid Phase Epitaxy
Publisher: OSA
Date: 2009
Hexagonal Boron Nitride as a Flexible Random Laser
Publisher: IEEE
Date: 05-2020
Efficient operation and power stability of a cw Er,Yb:YCOB laser at 1.55 μm
Publisher: IEEE
Date: 2003
Laser-activated solid protein solder for nerve repair: In vitro studies of tensile strength and solder/tissue temperature
Publisher: Springer Science and Business Media LLC
Date: 09-1999
Plasmonic second-harmonic generation in gold:lithium niobate thin films
Publisher: The Optical Society
Date: 17-01-2018
Simple, thermally-stabilized, diode end-pumped, planar Nd:YAG laser
Publisher: Elsevier BV
Date: 04-1999
Direct opal fabrication from silver-coated silica microspheres
Publisher: IEEE
Date: 05-2011
Comparative study of UV-laser ablation of PETG under nanosecond and femtosecond exposure
Publisher: IEEE
Date: 2005
A novel beam delivery method for femtosecond laser based direct-write waveguide fabrication
Publisher: IEEE
Date: 2005
Fibre Bragg Gratings Characteristics for Temporal Spectral Astronomy
Publisher: OSA
Date: 2010
Widely tunable yellow-green lasers based on the self-frequency-doubling material Yb:YAB
Publisher: Optica Publishing Group
Date: 04-2003
Functionalising opals: Versatile self-assembled photonic crystal devices
Publisher: IEEE
Date: 08-2011
<title>Optimal parameters for laser tissue soldering</title>
Publisher: SPIE
Date: 07-1998
DOI: 10.1117/12.312299
Coupled-cavity, single-frequency, tunable cw Yb:YAB yellow microchip laser
Publisher: Elsevier BV
Date: 06-2002
Diode-Pumped Nd:YAG Lasers Using Solid Non-Focussing Collector Geometry
Publisher: OSA
Date: 1992
Single frequency lasers and efficient cladding-pumped lasers using Yb3+-doped silica fibre
Publisher: IEEE
Date: 1994
Tissue repairs using a biodegradeable laser-activated solid protein solder
Publisher: IEEE
Date: 2000
Metasurface Measuring Twisted Light in Turbulence
Publisher: American Chemical Society (ACS)
Date: 09-09-2022
Metasurface measuring twisted light in turbulence
Publisher: Optica Publishing Group
Date: 2022
DOI: 10.1364/CLEOPR.2022.CMP16A_05
Abstract: Practical free-space communication systems suffer from turbulence-induced phase distortions to propagating beams, destroying the orthogonality of orbital angular momentum (OAM) modes used for space- ision multiplexing and introducing modal crosstalk. Here we present the design and use of an ultrathin OAM mode-sorting metasurface for investigating the deterioration of OAM orthogonality under different turbulence conditions, offering a compact, fast and efficient way to measure the OAM spectrum.
Thermal lensing measurements and thermal conductivity of Yb:YAB
Publisher: Springer Science and Business Media LLC
Date: 03-2003
Laser-activated protein solder for peripheral nerve repair
Publisher: SPIE
Date: 12-05-1995
DOI: 10.1117/12.209075
Ytterbium-doped silica fiber lasers: versatile sources for the 1-1.2 μm region
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 04-1995
DOI: 10.1109/2944.468377
Asia-Pacific Optical Sensors Conference: focus issue introduction
Publisher: Optica Publishing Group
Date: 07-07-2020
DOI: 10.1364/OE.401277
Abstract: This feature issue of Optics Express contains 17 articles expanding on recent advances in optical sensors presented at the eighth Asia-Pacific Optical Sensors Conference (APOS 2019) held in Auckland, New Zealand, from November 19 to 22, 2019. These articles span sensing for real-time positioning, refractive indices, strain, gas, and temperature using a variety of methods including photoacoustic computed tomography, coherent optical frequency-modulated continuous-wave interferometry, enhanced Bragg gratings, and phase-sensitive optical frequency-domain reflectometry.
Thermal lensing measurements in line-focus end-pumped neodymium yttrium aluminium garnet using holographic lateral shearing interferometry
Publisher: AIP Publishing
Date: 15-03-1998
DOI: 10.1063/1.367077
Abstract: Thermal lensing in compact neodymium yttrium aluminium garnet slabs and rods end pumped with a beam brought to a line focus has been measured using holographic lateral shearing interferometry. This powerful technique enabled us to directly measure thermal lenses with focal lengths in the range 0.02–12 m with an accuracy of 12% and good spatial resolution. It was found that the line focused pump beam resulted in severe astigmatic thermal lensing. The measured thermal lens strongly deviated from the ideal parabolic profile along both axes, introducing an important additional consideration for laser-diode end-pumped laser resonator design. The degree of longitudinal heat flow was found to strongly influence thermal lens power. It is anticipated that results obtained from the measurement technique presented here will enable optimal design of high-power end-pumped solid-state laser cavities.
Opal-templated films for optical strain sensing
Publisher: Optica Publishing Group
Date: 14-05-2020
DOI: 10.1364/OE.390095
Abstract: A polydimethylsiloxane film patterned by a self-assembled array has been demonstrated as a strain sensor. A monolayer of 580 nm polystyrene spheres prepared by convective deposition was the template to transfer a periodic pattern to a polydimethylsiloxane (PDMS) film. Optical diffraction through the stretched PDMS film, enabled strain sensing perpendicular and parallel to the stretching direction, with sensitivities of 1.7 nm/% strain and 4.0 nm/% strain, respectively. The PDMS film was used as a vibration sensor at 50 Hz.
Power scaling of cw diode-pumped Yb:KGW self-Raman laser
Publisher: IEEE
Date: 2003
Shortcuts to adiabaticity in waveguide couplers–theory and implementation
Publisher: Informa UK Limited
Date: 2021
A 1064 nm, 1085 nm Dual-Wavelength Nd:YVO4 Laser Using Fabry–Perot Filters as Output Couplers
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 10-2014
Excited state proton transfer in jet-cooled 3-hydroxyflavone and its methanol complexes
Publisher: Elsevier BV
Date: 06-1993
Fibre bragg gratings for temporal spectral astronomy
Publisher: SPIE
Date: 16-07-2010
DOI: 10.1117/12.856784
Investigation into the power-law dependence of fibre Bragg grating growth
Publisher: Elsevier BV
Date: 2006
Laser nerve repair by solid protein band technique. II: Assessment of long-term nerve regeneration
Publisher: Wiley
Date: 1998
DOI: 10.1002/(SICI)1098-2752(1998)18:1<60::AID-MICR13>3.0.CO;2-Q
Abstract: A total of 18 adult male Wistar rats had left tibial nerve repaired by either the laser-solder technique or a more conventional microsuture technique. The diode laser power was 90 mW and the radiation dose 16 J/mg. Three months postoperatively electrophysiology showed that the average compound muscle action potential (CMAP) of the laser repair group was not significantly different from the CMAP of the sutured nerves. Light microscopy confirmed regeneration of myelinated axons in both groups of animals. The laser-solder technique, when used with such parameters, proved to be a reliable method to achieve satisfactory peripheral nerve anastomosis and nerve regeneration.
Dopamine sensing and measurement using threshold and spectral measurements in random lasers
Publisher: The Optical Society
Date: 30-11-2015
DOI: 10.1364/OE.24.000A85
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