A5101897547- Advanced Fiber Laser Technologies
- Solid State Laser Technologies
- Photonic Crystal and Fiber Optics
- Laser Design and Applications
- Laser-Matter Interactions and Applications
- Photorefractive and Nonlinear Optics
- Advanced Fiber Optic Sensors
- Optical properties and cooling technologies in crystalline materials
- Thermal Radiation and Cooling Technologies
- Optical measurement and interference techniques
- Photonic and Optical Devices
- Advanced Measurement and Metrology Techniques
- Luminescence Properties of Advanced Materials
- Advanced Thermodynamics and Statistical Mechanics
- Plant Reproductive Biology
- Magnetic and Electromagnetic Effects
- Surface Roughness and Optical Measurements
- Advanced Algorithms and Applications
- Medical Image Segmentation Techniques
- Analytical Chemistry and Sensors
- Metamaterials and Metasurfaces Applications
- Cold Atom Physics and Bose-Einstein Condensates
- Orbital Angular Momentum in Optics
- Plant tissue culture and regeneration
- Semiconductor Lasers and Optical Devices
Carnegie Mellon University
2024
Harbin Engineering University
2012-2024
University of Science and Technology Beijing
2023
Institute of Environment and Sustainable Development in Agriculture
2017
Chinese Academy of Agricultural Sciences
2017
Harbin Institute of Technology
2009
In order to solve the problem that measurement arm length needs be obtained in real time when calculating angle process of Tolansky interference small measurement, a dual-arm autocollimation scheme is proposed, which not only maintains function interference, but also integrates principle optical leverage. simulation study, it found splitter with thickness will lead lateral offset axis emitted light, change position virtual point light source, and finally center circle on detector. this work,...
In this paper we report on a laser diode end-pumped single longitudinal mode (SLM) and continuously tunable frequency Tm,Ho:YLF with high beam quality at room temperature. The maximal output power of is as 118 mW by using two uncoated fused silica etalons, which are respectively 0.1 mm 1 thick. Furthermore, the can be tuned over GHz only angle tuning thick etalon. used seed for coherent wind measurements differential absorption lidar systems.
A compact diode-pumped continuous wave and passively Q-switched Tm,Ho:LuLiF(4) laser is demonstrated. The maximal output power of 381 mW at 2069 nm in regime obtained an absorbed pump 1.5 W. By using a Cr(2+):ZnS saturable absorber, the maximum average 74 2055 nm. pulse width energy are almost independent power, with values 1.2 μs 13 μJ respectively. repetition frequency can be tuned linearly from 1 to 5.8 kHz by changing power. Furthermore, comparative analysis performances different...
A compact diode-end-pumped actively Q-switched intracavity Raman laser with Tm,Ho:GdVO(4) gain medium and BaWO(4) crystal is demonstrated for the first time. The threshold as low 2.0 W of diode power at 802 nm. highest average output 186 mW Stokes wavelength 2533 nm obtained a pulse repetition rate 1 kHz, pump 2.8 W, corresponding to diode-to-Stokes optical conversion efficiency 6.6%. pulsewidth energy are 7.8 ns 0.19 mJ, respectively.
In this paper we first report on a continuous wave laser diode end-pumped passively Q-switched Tm,Ho:YLF at 2053 nm with Cr:ZnS crystal as saturable absorber near room temperature. The pulsewidth is very stable about 1.25 μs, the pulsed energy 4 μJ, and pulse repetition between 1.3 2.6 kHz when pump power changed from 1.0 to 1.9 W. nearly diffraction-limited long can be used lidar systems for accurate wind velocity measurements.
We first report a diode-pumped continuous wave orthogonally polarized dual-wavelength single-longitudinal-mode laser with single c-cut Tm,Ho:LuLiF₄ crystal. The simultaneous near 2 μm is realized by using two uncoated intracavity Fabry-Perot etalons. output wavelengths are 2064 nm in π-polarization and 2066 σ-polarization respectively, which orthogonal to each other. At the absorbed pump power of 1 W, maximum powers at 76 32 mW respectively. possible be applied differential absorption lidar...
In this paper we report on laser diode end-pumped single longitudinal mode and optical bistability Tm,Ho:YLF lasers at room temperature. The maximal output power of can reach 106 mW by using only a 250 μm thick solid etalon. be used as seed for lidar systems. Furthermore, the first time, phenomenon low threshold temperature is observed.
We report on a laser diode-end-pumped continuously tunable single frequency Tm, Ho:LLF near room temperature. For transmission of 5%, the maximum output power 221 mW at 2064.4 nm was obtained by using two uncoated etalons. The operated fundamental transverse mode with an M2 factor 1.13, and could be tuned 1.5 GHz angle tuning only 1 mm thick etalon. Furthermore, influence coupler performance also investigated. can used as seed for coherent Doppler lidar differential absorption systems.
Non-linear metamaterials hold great promise for enhanced terahertz harmonic generation. Here, we numerically investigate third-harmonic generation (THG) by exploiting the symmetry-protected bound states in continuum (BICs) graphene grating-like metamaterial. By symmetry breaking of metamaterials, BICs transform into quasi-BICs. The high Q-factor and strong localized field enhancement is achieved at quasi-BICs, leading to a boosted THG process with low incident intensity fundamental...
In this article, the numerical simulations and experimental investigations on evolution of soliton rain in Tm-doped fiber laser were carried out, based nonlinear polarization rotation (NPR) technique. By carefully adjusting controller (PC) cavity, phenomenon was observed, which pulse train length a drifting solitons about 0.36 μs, 0.77 0.92 respectively. order to further analyze influence PC formation rain, corresponding analysis performed. The simulation consistent with results. Our present...
Abstract A 2 μm passively Q‐switched Tm:YAP solid‐state laser with MoS as saturated absorber was demonstrated in this work. two‐dimensional materials were prepared by using the method of chemical vapor deposition. The achieved high peak power 21.2 W and single pulse energy 19.5 μJ, while maintaining a short width 916 ns. This is first time that Tm:TAP based on has reached W. beam quality factor M x = 1.08 y 1.10.
A compact, orthogonally polarized, gain-switched a-cut Ho:LuLiF4 laser with intra-cavity pumping by a self-Q-switched Tm:YAP is demonstrated here for the first time. The π-polarization at 2052 nm and σ-polarization 2066 were experimentally observed maximum output power values of 299 mW 126 mW, respectively, two polarization directions always kept mutually orthogonal as pump increased. ratio between lasers was nearly 1:1 18.4 W. minimum pulse width Ho:LLF 326 ns, repetition rate 24 kHz,...
We experimentally demonstrate strong optical bistability in a 2 μm continuous wave Tm,Ho:YLF laser with bulk crystal. The is end-pumped by 792 nm fiber-coupled diode. bistable region as wide 1.6 W and the jump power at turning point high 82.5 mW when temperature of crystal kept 253 K. influences cavity length transmission output coupler on characteristics are obtained. theoretical analysis shows that lasers comes from combined effects nonlinear saturation ground state reabsorption, energy...
We first report on a diode-end-pumped passively Q-switched mode-locking Tm,Ho:LLF laser at 2053 nm by using Cr:ZnS saturable absorber. A stable pulse train with nearly 100% modulation depth was achieved. The repetition frequency of the envelope increased from 0.5 to 12.3 kHz increasing pump power 1 4.36 W. maximum average output 145 mW obtained, and width mode-locked estimated be less than 682 ps 250 MHz within about 700 ns.