A5012323132- Advanced Fiber Laser Technologies
- Solid State Laser Technologies
- Laser-Matter Interactions and Applications
- Photorefractive and Nonlinear Optics
- Photonic Crystal and Fiber Optics
- Laser Design and Applications
- Diamond and Carbon-based Materials Research
- Nonlinear Optical Materials Studies
- Photonic and Optical Devices
- Luminescence Properties of Advanced Materials
- Optical Network Technologies
- 2D Materials and Applications
- Advanced Fiber Optic Sensors
- Spectroscopy and Laser Applications
- MXene and MAX Phase Materials
- Nonlinear Optical Materials Research
- High-pressure geophysics and materials
- Laser Material Processing Techniques
- Quantum optics and atomic interactions
- Semiconductor Lasers and Optical Devices
- Glass properties and applications
- Boron and Carbon Nanomaterials Research
- Superconductivity in MgB2 and Alloys
- Magneto-Optical Properties and Applications
- Luminescence and Fluorescent Materials
Shandong University
2016-2025
Qingdao Binhai University
2019-2024
Ministry of Education of the People's Republic of China
2021-2023
Shandong Normal University
2022
Qingdao Center of Resource Chemistry and New Materials
2020-2021
Sichuan University of Science and Engineering
2020
Qingdao University
2020
Qinghai Provincial Peoples Hospital
2017
Tsinghua University
2012-2016
Shanxi University
2012
Cr/sup 4+/-doped saturable absorbers are characterized by long excited state lifetime and appreciable absorption. In the paper, we first solve three coupled rate equations describing operation of saturable-absorber passively Q-switched lasers to obtain expressions pulse characteristics such as output energy, peak power, pulsewidth. We then determine key parameters an optimally laser functions two variables concerning amplifying medium, pump level, generate several design curves. These...
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.
By using the ultrasound-assisted liquid phase exfoliation method, Bi2Te3 nanosheets are synthesized and deposited onto a quartz plate to form kind of saturable absorber (SA), in which nonlinear absorption properties around 2 μm analyzed with home-made mode-locked laser. With as-prepared SA employed, stable passively Q-switched all-solid-state laser is successfully realized. pulses maximum average output power 2.03 W generated under an coupling 5%, corresponding single-pulse energy 18.4 μJ...
In the present work, uniformly sized bismuthene quantum dots (BiQDs) with an average diameter of 26 nm were fabricated via solvothermal approach. By transferring BiQDs onto plane micro-machined D-shaped fiber (DSF), a new type saturable absorber (SA) was successfully prepared. Based on evanescent field effect fiber, prepared SA exhibits excellent absorption properties maximum modulation depth 5.1% at around 1.5 μm. To further investigate its potential applications in ultrafast photonics, we...
Here, we investigated the nonlinear optical (NLO) characteristics of carboxyl-functionalized graphene oxide (GO-COOH) in near-infrared (NIR) region. The results revealed that GO-COOH samples exhibit strong saturable absorption at low pump levels and a gradual transition to reverse (RSA) with increasing power. Then absorber (SA) by depositing on side-polished fiber (SPF) was employed Yb- Er-doped lasers. Stable ultrashort pulses operating dissipative soliton (DS) conventional (CS) regimes...
Two-dimensional (2D) layered nanosheets of violet phosphorene (VP) have great potential in optoelectronic applications owing to their unique electronic, mechanical, and optical properties. Herein, the nonlinear (NLO) properties liquid-phase-exfoliated (LPE) VP based on a side-polished D-shaped fiber (DSF) were experimentally investigated by homemade dual-balance detection system at near-infrared band. A strong saturable absorption response was observed. The corresponding modulation depth...
In this paper, Fe-doped Co3O4 (Fe-Co3O4) with oxygen vacancy defects, which was derived from ZIF-67, successfully synthesized via high-temperature calcination and verified using several special characterization methods. Femtosecond-resolved...
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 have investigated the lasing characteristics of Tm:LSO crystal in three operation regimes: continuous wave (CW), wavelength tunable and passive Q-switching based on graphene. In CW regime, a maximum output power 0.65 W at 2054.9 nm with slope efficiency 21% was achieved. With quartz plate, broad range 145 obtained, corresponding to FWHM 100 nm. By using graphene saturable absorber mirror, passively Q-switched laser produced pulses duration 7.8 μs 2030.8 under repetition rate 7.6 kHz,...
Few-layered InSe nanosheets were fabricated by the simple liquid-phase exfoliation method. The morphology and crystal structure features of nanosheet sample characterized comprehensively. photoluminescence (PL) spectrum indicated that exfoliated contained variously layered nanoflakes, where eight layers dominate. In addition, first-principle simulation was carried out to describe electron density states (DOS) electronic band structures. Moreover, few-layered performed excellent nonlinear...
The intracavity photon density and the initial population-inversion in diode-pumped passively Q-switched laser rate equations are assumed to be Gaussian spatial distributions. These space-dependent solved numerically, a group of general curves generated. clearly show dependence pulse characteristics on pump- laser-mode size ratio parameters gain medium, saturable absorber, resonator. They can also used estimate an arbitrary determine optimal ratio. In addition, these not limited lasers....
The electronic structure and optical properties of ternary GaAs:Bi alloy are investigated by first principles calculations. It is found that the band gap GaAs1-xBix decreases monotonously with increasing Bi concentration, resulting in fundamental absorption edge main peaks shifting toward lower energy increase content. constants GaAs1-xBix, such as coefficient, refractive index, extinction coefficient conductivity, greater than those pure GaAs when x > 3.1%, but less < which primarily...
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....
Abstract Cupric oxide (CuO), as a transition metal (TMO) semiconductor, has attracted tremendous attention for various applications. In the present work, we synthesize CuO nanosheets modified by TiO 2 nanoparticles via facile, non-toxic two-step method. Subsequently, morphology and structures of /CuO nanocomposites are investigated. By utilizing common Z-scan technology, broadband nonlinear optical (NLO) properties as-prepared demonstrated, elucidating enhancement on NLO response dopant,...
Zeolitic imidazolate frameworks (ZIFs) show extraordinary potential in the domains of fundamental research and miscellaneous technology applications.
In this Letter, a watt-level laser diode (LD)-pumped ∼2.3-µm (on the 3H4→3H5 quasi-four-level transition) is reported based on 1.5 at.% a-cut Tm:YVO4 crystal. The maximum continuous wave (CW) output power obtained 1.89 W and 1.11 with slope efficiency of 13.6% 7.3% (versus absorbed pump power) for 1% 0.5% transmittance coupler, respectively. To best our knowledge, CW we highest amongst LD-pumped Tm3+-doped lasers.
Controllable soliton molecules were generated in a Er-doped mode-locked fiber laser with few-layered violet phosphorene saturable absorber.
As a new member of two-dimensional (2D) phosphorene, 2D layered violet phosphorus (VP) has unique optoelectronic properties and good environmental stability, showing its huge advantages in applications. In this paper, the ultrafast nonlinear optical (NLO) VP nanosheets at 1 µm band were explored, which exhibit an obvious saturable absorption response with modulation depth ∼1.97%. Meanwhile, fast slow carrier lifetimes 1µm also determined as 295.9 fs 2.36 ps, respectively, are much shorter...
A laser-diode-pumped passively-Q-switched intracavity-frequency-doubled Nd:YVO 4 /YVO green laser with a MgO-PPLN and Cr 4+ :YAG is realized. The dependences of pulse width, repetition rate on incident pump power at different small-signal transmissions are measured for the green-light pulses. corresponding energy peak also been obtained.