A5100332548- Solid State Laser Technologies
- Luminescence Properties of Advanced Materials
- Advanced Fiber Laser Technologies
- Photorefractive and Nonlinear Optics
- Glass properties and applications
- Photonic Crystal and Fiber Optics
- Laser Design and Applications
- Spectroscopy and Laser Applications
- Ocular and Laser Science Research
- Laser Material Processing Techniques
- Advanced Fiber Optic Sensors
- Optical properties and cooling technologies in crystalline materials
- Liquid Crystal Research Advancements
- Laser-Matter Interactions and Applications
- Nonlinear Optical Materials Studies
- Photonic and Optical Devices
- Optical Network Technologies
- Optical Coherence Tomography Applications
- Orbital Angular Momentum in Optics
- Wireless Sensor Networks and IoT
- Electronic Packaging and Soldering Technologies
- Tea Polyphenols and Effects
- Elevator Systems and Control
- Antenna Design and Optimization
- Digital Holography and Microscopy
Jinan University
2015-2024
Optics Technology (United States)
2022-2023
Guizhou Electric Power Design and Research Institute
2022
Key Laboratory of Guangdong Province
2016-2019
China Aerospace Science and Technology Corporation
2017
National Research Institute of Brewing
2016
Shanghai Institute of Optics and Fine Mechanics
2012
Chinese Academy of Sciences
2012
Anhui Polytechnic University
2011
State Key Laboratory of Crystal Materials
2010
We present the growth, spectroscopy, continuous-wave (CW) and passively mode-locked (ML) operation of a novel "mixed" tetragonal calcium rare-earth aluminate crystal, Yb
A highly powerful nanosecond pulsed deep-red laser was demonstrated by intracavity second-harmonic generation of an actively Q-switched Nd:YLF dual-crystal-based KGW Raman in a critically phase-matched lithium triborate (LBO) crystal. The first-Stokes fields at 1461 and 1490 nm driven the 1314 fundamental were firstly produced accessing shifts 768 901 cm −1 crystal, respectively, thereafter converted to emission lines 731 745 finely tuning phase-matching angle LBO crystal carefully...
This paper demonstrates light-induced tuning of the optical spectrum by a microfiber-knot resonator overlaid with photoresponsive liquid crystal (LC) mixture containing photosensitive diluents (non-mesogenic azobenzene molecules), chiral dopant and nematic LC. The high-quality is made drawing single mode fiber to micro-size diameter causing microfiber self-twist into knot. A thin layer was placed on overlap (knot) area gentle heating used obtain uniform film which coated fiber's surface....
Litchi (Litchi chinensis Sonn.) fruit is known for its rich source of phenolics. pericarp contains high levels epicatechin that may form oligomers various lengths. Except several A or B type dimers, other soluble have rarely been identified in the pericarp. Here, bioassay-guided column fractionation was applied to isolate bioactive phenolics from aqueous extract. fraction (S3) obtained by two rounds Sephadex LH-20 chromatography, and showed higher antioxidant activity inhibition on...
We demonstrate an 806 nm laser diode end-pumped continuous-wave (CW) and actively Q-switched (AQS) orthogonally-polarized dual-wavelength Nd:YLF operating at 1314 1321 nm. Benefitting from the small difference of stimulated emission cross sections in crystal, power equalized emissions both wavelengths were achieved by simply titling output coupler. A maximum CW 9.2 W was obtained with incident pump 32.5 W, giving optical-to-optical conversion efficiency approximately 28% a slope 33%....
We demonstrate the first multi-segmented Nd:YLF laser, to best of our knowledge. The crystal was designed straightforwardly aim for minimum thermal stress without sacrificing overall laser efficiency, with influence pump beam waist position considered in particular. Integrating enhanced thermo-mechanical resistance and alleviated heat load low quantum defect pumping, this end-pumped 1314 nm system delivered a maximum continuous-wave output power up 35.5 W under 105 W, corresponding an...
We report on a high average power and repetition rate nanosecond pulsed eye-safe KGW Raman laser intracavity driven by an acousto-optic Q-switched 1342 nm two-crystal Nd:YVO
A high-power and high-energy nanosecond-pulsed solid-state pro-yellow laser at 578 nm is developed by intracavity second-harmonic generation of an acousto-optically Q -switched Nd:YLF/KGW Raman in a type I critical phase-matching LBO crystal. The first-Stokes 1156 driven the 1047 Nd:YLF on π polarization firstly generated accessing shift 901 cm −1 KGW crystal then turns into Substantial power efficiency enhancements have been enabled improving thermal fracture pump limit with multi-segmented...
We report a high average power actively Q-switched (AQS) orthogonal polarization dual-wavelength Nd:YLF laser at 1047 and 1053 nm. The gain-to-loss balance of dual wavelengths was realized via an uncoated quartz etalon. A maximum continuous wave (CW) output 14.2 W obtained under the incident pump 41.7 W, corresponding to optical-to-optical conversion efficiency 34.1% slope 38.3%. Active Q-switching accomplished by inserting acousto-optic modulator in cavity. Under 40 this setup delivered 10...
This study presents an optically controllable fiber-optic attenuator consisting of side-polished fiber (SPF) with a photoresponsive liquid crystal (LC) overlay operating in the telecommunication wavelength. Attenuation is controlled by photochemical-induced phase transition LC, which modulates evanescent field leaked from polished area. Before optical illumination, LCs are light-scattering state and attenuation high. During photoirradiation, formation cis-azobenzene LC disrupts nematic host...
A compact dual-wavelength passively Q-switched green laser by intra-cavity frequency doubling of a Yb:YAG/Cr4+:YAG/YAG composite crystal was demonstrated for the first time to our best knowledge. The maximum output power 1.0 W obtained under pump 9.7 W, and corresponding slope efficiency is 15.2%. shortest pulse width, largest energy, highest peak were achieved be 5.54 ns, 246.1μJ, 40.76 KW, respectively. Dual-wavelength oscillation simultaneously at 515 nm 524.5 has been achieved. This can...
High beam quality 588 nm radiation was realized based on a frequency-doubled crystalline Raman laser. The bonding crystal of YVO4/Nd:YVO4/YVO4 used as the laser gain medium, which can accelerate thermal diffusion. intracavity conversion and second harmonic generation were by YVO4 an LBO crystal, respectively. Under incident pump power 49.2 W pulse repetition frequency 50 kHz, 2.85 obtained with duration 3 ns, corresponding to diode-to-yellow efficiency 5.75% slope 7.6%. Meanwhile, single...
The use of Nd3+ codoping for sensitizing the Ho3+ ion and enhancing ∼3.9 μm emission from Ho3+:I55→I65 was investigated in PbF2 crystal first time, to best our knowledge. fluorescence properties energy transfer mechanism as-grown crystals were investigated. results show that can act as a sensitizer ion, providing an efficient excitation channel, making Ho3+/Nd3+:PbF2 propitious be pumped by commercialized InGaAs laser diodes (LDs). Moreover, enhanced obtained due ions, leading lower level...
The use of Pr3+ codoping for enhancement the transition Er3+: 4I11/2 → 4I13/2 2.7 μm emissions was investigated in Er/Yb codoped LiNbO3 crystal first time. It is found that ion Er3+, Yb3+ and triply doped (Er/Yb/Pr: LN) greatly enhances emission under excitation a common 970 nm laser diode, depopulates lower level Er3+:4I13/2, has little influence on higher Er3+:4I11/2 at same time population inversion. characteristics energy transfer were detail. efficiency from Er3+:4I13/2 to Pr3+:3F4 as...
We have experimentally demonstrated passively Q-switched (PQS) stimulated Raman scatting (SRS) emissions in an a-cut YVO4 crystal a coupled cavity, using Yb:YAG/YAG/Cr4+:YAG/YAG composite to generate the PQS fundamental laser, for first time, our best knowledge. At incident pump power of 6.30 W, Stokes average output 0.42 W was achieved. Due cascaded effect, four first-Stokes lines operating at 1092.6 nm, 1125.4 1135.1 nm and 1157.0 three second-Stokes 1210.6 1263.2 1290.1 were generated...
A single-longitudinal-mode crystalline Raman laser in the 1.7 µm wave band was reported for first time, to best of our knowledge. The <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"> <mml:mrow class="MJX-TeXAtom-ORD"> <mml:msub> <mml:mi mathvariant="normal">Y</mml:mi> mathvariant="normal">V</mml:mi> mathvariant="normal">O</mml:mi> </mml:mrow> <mml:mn>4</mml:mn> </mml:msub> </mml:math> laser, which intracavity-pumped by an actively <mml:mi>Q</mml:mi> -switched 1314...
We demonstrate an efficient wavelength-selectable output in the attractive deep-red spectral region from intracavity frequency converted Nd:YLF/KGW Raman laser. Driven by acousto-optic Q-switched 1314 nm Nd:YLF laser, two first-Stokes waves at 1461 and 1490 were generated owing to bi-axial properties of KGW crystal. By incorporating sum-frequency generation second-harmonic with angle-tuned bismuth borate (BIBO) crystal, four discrete laser emission lines yielded wavelengths 692, 698, 731,...
We demonstrate both theoretically and experimentally beam-dependent photonic spin-orbit coupling in a two-wave mixing process described by an equivalent of the Pauli equation quantum mechanics. The considered structured light system is comprising superposition two orthogonal spin-orbit-coupled states defined as spin-up -down equivalents. manifested prominent pseudospin precession well spin-transport-induced orbital angular momentum generation crystal film wavelength thickness. effect...
Realizing high average power nanosecond pulsed single longitudinal mode laser sources around 1.6 μm are of intense interest for applications as diverse range finding, remote sensing, and environmental monitoring. Herein, we first demonstrate a beam quality eye-safe diamond Raman at 1634 nm, which is intracavity driven by an acousto-optic Q-switched two-crystal Nd:YVO4 1342 nm. By exploiting the subtly designed dynamically stable resonator thoroughly optimized modulator, excellent substantial...