A5101758743- Solid State Laser Technologies
- Advanced Battery Materials and Technologies
- Advancements in Battery Materials
- Photorefractive and Nonlinear Optics
- Advanced Fiber Laser Technologies
- Supercapacitor Materials and Fabrication
- Luminescence Properties of Advanced Materials
- Semiconductor Lasers and Optical Devices
- Advanced battery technologies research
- Laser-Matter Interactions and Applications
- Photonic Crystal and Fiber Optics
- Photonic and Optical Devices
- Optical Coatings and Gratings
- Extraction and Separation Processes
- Spectroscopy and Laser Applications
- Optical Polarization and Ellipsometry
- Surface Roughness and Optical Measurements
Shanghai University
2021-2023
Wenzhou University
2022
Bellingham Technical College
2016
Nanyang Technological University
2011-2013
Beijing University of Chemical Technology
2006
Beijing University of Technology
2005
Beijing Polytechnic
2005
Developing hard carbon with a high initial Coulombic efficiency (ICE) and very good cycling stability is of great importance for practical sodium-ion batteries (SIBs). Defects oxygen-containing groups grown along either the edges or layers, however, are inevitable in can cause tremendous density irreversible Na+ sites, decreasing therefore causing failure battery. Thus, eliminating these unexpected defect structures significant enhancing battery performance. Herein, we develop strategy...
Abstract Rechargeable lithium/sodium–sulfur batteries working at room temperature (RT‐Li/S, RT‐Na/S) appear to be a promising energy storage system in terms of high theoretical density, low cost, and abundant resources nature. They are, thus, considered as highly attractive candidates for future application devices. Nevertheless, the solubility sulfur species, sluggish kinetics lithium/sodium sulfide compounds, reactivity metallic anodes render these cells unstable. As consequence,...
Prussian blue analogues (PBAs) have attracted extensive attention as cathode materials in sodium-ion batteries (SIBs) due to their low cost, high theoretical capacity, and facile synthesis process. However, it is of great challenge control the crystal vacancies interstitial water formed during aqueous co-precipitation method, which are also key factors determining electrochemical performance. Herein, an antioxidant chelating agent co-assisted non-aqueous ball-milling method generate...
Increasing generation of permanent magnet waste has resulted in an urgent need to preserve finite resources. Reforming these wastes as feedstock produce renewables is ideal strategy for addressing and energy challenges. Herein, our work reports a smart sustainable convert iron into Prussian blue analogues that can serve cathode materials sodium-ion batteries. Moreover, method control feed rates proposed generate high-quality with fewer [Fe(CN)6] vacancies at rate 3 mL min-1. The recycled...
A diode pumped ytterbium-doped lutetium aluminum garnet (Yb:LuAG) ceramic laser is reported for the first time to our knowledge. Using solid state reactive vacuum sintering technique we have successfully fabricated high optical quality Yb:LuAG ceramics. We show that even with an uncoated sample a maximum output power of 7 W could be achieved under 13 absorbed pump power, and has slope efficiency as 63%. Considering higher thermal conductivity than Yb:YAG heavy doping situation, attractive...
The cw and femtosecond laser operations of Yb(3+):CaYAlO(4) (Yb:CYA) are demonstrated. emitted a maximum power 1.94 W with slope efficiency (η(slope)) 71% an optical-to-optical (η(opt)) 51%. Under mode-locking operation, the near transform-limited pulses 156 fs pulse width, 8.1 nJ energy 0.74 average power. η(slope) η(opt) mode-locked were 37% 20%, respectively.
We have successfully fabricated a new type of ytterbium-doped yttrium gadolinium aluminum garnet (Yb:GdYAG) laser ceramic using the solid-state reactive sintering method under vacuum condition. Continuous wave (CW) operation 5.0 at.% Yb:GdYAG has achieved 4.27 W output power with 26.7% slope efficiency. Passive mode-locking properties was also firstly demonstrated semiconductor saturable absorbing mirror (SESAM). Stable mode-locked pulses 4.4 ps pulse width and maximum 3.75 at wavelength...
The room temperature continuous wave (CW) laser performance of a compact Yb:CaYAlO4 (Yb:CYA) with near quantum limit slope efficiency is demonstrated. Pumped CW diode operating at 979 nm, the emitted maximum output power 2.3 W 1050 nm. corresponding was found to be 92% while optical conversion 70%. can also continuously tuned from 1008 nm 1063 using an intra-cavity SF 10 prism. round trip cavity losses Yb:CYA 0.6% loss coefficient crystal 0.01 cm-1.
Highly efficient CW operation of diode-end-pumped Nd:YAG ceramic lasers at 946 nm is experimentally demonstrated. When a 5 mm long in-house fabricated was used as the gain medium, maximum output power 10.5 W obtained under an incident pump 35 W, corresponding to optical conversion efficiency 30%, while, when 3 sample used, 8.7 generated with slope 65% respect absorbed power. Both and are highest results reported so far for diode-pumped lasers.
A diode-pumped passively mode-locked Yb:Lu2Si2O7 (Yb:LPS) laser is demonstrated for the first time, to our knowledge. Using a commercial semiconductor saturable absorber mirror (SESAM) as mode locker and pair of Gires-Tournois interferometer (GTI) mirrors group-velocity dispersion (GVD) compensating, we have obtained stable femtosecond locked pulses. Two output couplers transmission 1.6% 5% were used exploit performance. For coupler with T = 1.6%, 195 fs pulses centered at 1042 nm generated,...
We report a continuous-wave (CW) KTA (KTiOAsO4)-OPO (optical parametric oscillator) with compact linear cavity utilizing an LD pumped mixed crystal Nd:Lu0.5Y0.5VO4 laser as the pump source for first time. A singly resonant oscillator low signal light loss was designed to reduce OPO’s threshold. Maximum output powers of 630 mW at 3475 nm and 190 mW 1536 nm were obtained power 13.2 W. total conversion efficiency 6.2% achieved respect incident diode power. The performance this work demonstrates...
We report the experimental observation of periodic dark pulse emission in a quantum-well semiconductor laser with delayed optical feedback. found that under appropriate operation conditions can also emit stable train pulses. The repetition frequency is determined by external cavity length. Splitting was observed. speculate observed kind temporal soliton formed laser.
The problems and fabrication difficulties with the conventional edge-emitted LDs, VCSELs LEDs were analyzed. Novel transverse coupled large optical cavity longitudinal high efficiency and, ultrahigh brightness multiactive region structure proposed. Simulations experiments indicated that these novel LDs of excellent performance application prospects.