A5100455279- Advanced Fiber Laser Technologies
- Solid State Laser Technologies
- Laser-Matter Interactions and Applications
- Photonic Crystal and Fiber Optics
- Photorefractive and Nonlinear Optics
- Diamond and Carbon-based Materials Research
- Advanced Fiber Optic Sensors
- Photonic and Optical Devices
- Laser Design and Applications
- Nonlinear Optical Materials Studies
- 2D Materials and Applications
- Magneto-Optical Properties and Applications
- Optical and Acousto-Optic Technologies
- Photonic Crystals and Applications
- Semiconductor Lasers and Optical Devices
- Optics and Image Analysis
- Particle Detector Development and Performance
- Glass properties and applications
- High-Energy Particle Collisions Research
- Nuclear Physics and Applications
- Simulation and Modeling Applications
- Tunneling and Rock Mechanics
- Advanced Measurement and Metrology Techniques
- Welding Techniques and Residual Stresses
- Acoustic Wave Resonator Technologies
Shandong University
2016-2025
Ministry of Education of the People's Republic of China
2021-2024
Shandong Normal University
2020-2024
Fuzhou University
2024
Hohai University
2024
State Key Laboratory of Crystal Materials
2018-2023
Tongji University
2023
City University of Hong Kong, Shenzhen Research Institute
2020-2022
Qingdao Binhai University
2019-2020
Qingdao University
2020
Efficient diode-pumped passively Q-switched Er:Lu2O3 laser operation at 2.84 μm was realized. A few-layer MoS2 nanosheet film on a YAG substrate, fabricated and employed as saturable absorber (SA) in short plane-plane cavity. Under an absorbed diode pump power of 7.61 W, average output 1.03 W generated with pulse duration 335 ns repetition rate 121 kHz, resulting energy 8.5 μJ.
We prepared WS2 nanosheets by using the thermal decomposition method and demonstrated for first time its nonlinear saturable absorption property at around 2 μm. With as-prepared as absorber (SA), a passively Q-switched Tm:LuAG laser was realized successfully, 660 ns pulses with an average output power of 1.08 W pulse peak 26 repetition rate 63 kHz were obtained incident pump 7 W. Our experimental results definitely demonstrate that could be kind promising SA solid-state μm lasers.
We present our efforts towards power scaling of Er:Lu2O3 lasers at 2.85 µm. By applying a dual-end diode-pumped resonator scheme, we achieve an output 14.1 W absorbed pump 59.7 with slope efficiency 26%. In single-end pumped 10.1 is reached under 41.9 power. To the best knowledge, this first single crystalline mid-infrared rare-earth-based solid-state laser exceeding 10 room temperature.
In this paper, the fabrication process and characterization of Bi2Te3 topological insulators (TIs) synthesized by spin-coating-coreduction approach (SCCA) is reported. With approach, high-uniformity nano-crystalline TI saturable absorbers (TISAs) with large-area uniformity controllable thickness are prepared. By employing these prepared TIs different thicknesses as SAs in 2-μm solid-state Q-switched lasers, thickness-dependent output powers pulse durations laser pulses obtained, result also...
Multilayer black phosphorus (BP) nanoplatelets of different thicknesses were prepared by the liquid phase exfoliation method and deposited onto yttrium aluminum garnet substrates to form saturable absorbers (SAs). These characterized with respect their thickness-dependent absorption properties at 3 μm. The BP-SAs employed in a passively Q-switched Er:Lu2O3 laser 2.84 μm. By using BP exfoliated solvents, stable pulses as short 359 ns generated an average output power up 755 mW. repetition...
The passive Q-switching characteristics of a diode-pumped Tm,Ho:YAP laser at 2 μm based on MoS <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> saturable absorber (SA) is presented for the first time. Pulses as short 435 ns under repetition rate about 55 kHz were generated incident pump power 8.4 W, corresponding to pulse peak up 11.3 W. This is, best our knowledge, highest power, ever obtained from passively Q-switched 2-μm lasers....
We report on an efficient Er:SrF2 laser at 2.79 μm. A continuous wave output power of 1.06 W was obtained with a slope efficiency 41%, significantly exceeding the Stokes 35%. Stable Q-switched operation realized by using ReS2 saturable absorber, generating average 0.58 pulse duration 508 ns repetition rate 49 kHz, corresponding to energy 12.1 μJ.
A >600 MHz harmonic mode-locked femtosecond holmium-doped (Ho-doped) fiber laser is presented by using the nonlinear polarization rotation (NPR) method. When works in fundamental mode-locking (FML) regime at 2063.1 nm, a pulse repetition rate of 20.8 obtained with corresponding duration 983 fs. By increasing pump power, 29th-order (HML) operation Ho-doped realized for first time, to best our knowledge. The maximum 603 2063.7 nm achieved 996 fs, super-mode suppression radio (SMSR) as high 33 dB.
We report the position reconstruction methods and surface background model for PandaX-4T dark matter direct search experiment. This work develops two algorithms: template matching (TM) method photon acceptance function (PAF) method. Both determine horizontal of events based on light pattern secondary scintillation collected by sensors. After a comprehensive evaluation resolution, uniformity, robustness, PAF was selected reconstruction, while TM employed verification. The achieves bulk event...
The saturable absorption properties of few-layer graphitic carbon nitride (g-C3N4) nanosheets near 3 μm were investigated. A stable Q-switched Er:Lu2O3 laser at 2.84 was realized by using a home-made g-C3N4 absorber (SA), generating pulse duration 351 ns and an average output power 1.09 W repetition rate 99 kHz, corresponding to energy 11.1 μJ. Our result indicates great potential as new SA in the wavelength range.
Compact LD pumped, CW, and passively Q-switched Nd,Mg:LiTaO <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</sub> lasers with a stable, synchronous dual-wavelength operation near 1082 1092 nm were demonstrated for the first time. Under an incident pump power of 7.69 W, maximum CW output 464 mW was obtained, corresponding to slope efficiency 7.6%. By using monolayer graphene as saturable absorber, steadily laser oscillation achieved. The 365...
A few-layer graphitic carbon nitride (g-CN) nanosheet film on an yttrium aluminum garnet substrate was fabricated and employed as saturable absorber for a passively Q-switched Ho,Pr:LiLuF4 laser at 2.95 μm. Under absorbed pump power of 3.89 W wavelength 1.15 μm, maximum average output 101 mW realized with pulse duration 420 ns repetition rate 93 kHz. Even shorter durations 385 were obtained reduced coupler transmission.
We investigate the saturable absorption properties of Bi2Se3 in a bulk laser operating at 2 µm wavelength region. The absorber (SA) is prepared with liquid-phase exfoliation method, which gives input flux 4.3 mJ/cm2, modulation depth ∼10%, and non-saturable 10.2%. With absorber, passive Q-witching Tm:YAG ceramic realized shortest pulse duration 355 ns, single energy 6.76 µJ peak power 19 W. believe that this first report on Q-switched laser.
In this paper, two-dimensional material Sb 2 Te 3 nanosheets are fabricated and the optical nonlinear response is investigated. A laser diode (LD) end-pumped doubly Q-switched Tm:YAP with electro-optic modulator (EOM) based saturable absorber (SA) presented. The shortest pulse duration of 38 ns achieved at repetition frequency 100 Hz, corresponding to highest peak power 111.8 kW. double Q-switching technique shows advantages compression improvement. coupled rate equations for developed...
By using WS <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> as saturable absorber (SA), a diode-pumped passively <inline-formula xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$Q$ </tex-math></inline-formula> -switched YVO xmlns:xlink="http://www.w3.org/1999/xlink">4</sub> /Nd:YVO laser is demonstrated. Under the pump power of 6.28 W, maximum output 1.36 W and minimum pulse duration 56 ns with repetition rate 1.03...
A room-temperature highly efficient Tm:YAP laser pumped MgO:PPLN optical parametric oscillator operating at 3.87 µm near degeneracy is demonstrated. The pump source an acousto-optical (AO) Q-switched laser, which delivers a maximum output power of 6.17 W with pulse duration 45 ns and repetition rate 6 kHz. temperature dependent wavelength tuning characteristics the PPLN-OPO investigated, OPO 1.2 around achieved 35°C, corresponding to optical-optical conversion efficiency 19.4%. To best our...
Cascade transitions of Ho3+:5I6→5I7 and 5I7→5I8 provide a platform for dual-wavelength mid-infrared (MIR) laser. In this paper, continuous wave cascade MIR Ho:YLF laser operating at 2.1 2.9 µm is realized room temperature. The total output power 929 mW with 778 151 obtained under the absorbed pump 5 W. Compared to non-cascade mode, 2.9-µm lasing threshold reduced by 10.3% slope efficiency increased 76.1% supports µm. However, key population accumulation 5I7 level, which thus efficiently...
2 μm ultrafast pulses as short 4.8 ps are obtained with a maximum average output power of 767 mW. This is the highest achieved so far, for passively mode-locked laser at using two-dimensional saturable absorber.
A kind of saturable absorber (SA) based on layered MoSe <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> nanosheets has been fabricated successfully by an ultrasound-assisted liquid phase exfoliation method. The as-prepared SA was characterized and employed as Q-switch in a diode-pumped Tm-doped crystalline all-solid-state laser at around 2 <italic xmlns:xlink="http://www.w3.org/1999/xlink">μ</i> m. stable passively Q-switched m with...
We demonstrate a passively Q-switched Ho,Pr:LiLuF4 laser at 2.95 μm using WS2 saturable absorber (SA). A shortest pulse width of 654 ns was achieved with an average output power 82 mW and the repetition rate 90.4 kHz T = 2%. Our result reveals that -SAs have great potential to be modulator in mid-IR wavelength range.
A passively Q-switched Ho,Pr:LiLuF <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">4</sub> laser at <inline-formula xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$2.95~\mu \text{m}$ </tex-math></inline-formula> was demonstrated by using a MoS xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> saturable absorber, which prepared liquid phase exfoliation method. Under an absorbed pump power of 3.77 W, the maximum average...