A5009017221- Solid State Laser Technologies
- Advanced Fiber Laser Technologies
- Photonic Crystal and Fiber Optics
- Electric Motor Design and Analysis
- Photorefractive and Nonlinear Optics
- Laser-Matter Interactions and Applications
- Laser Design and Applications
- Induction Heating and Inverter Technology
- Magnetic Bearings and Levitation Dynamics
- Sensorless Control of Electric Motors
- Drilling and Well Engineering
- Tunneling and Rock Mechanics
- Electric Power Systems and Control
- Engineering Diagnostics and Reliability
- Multilevel Inverters and Converters
- Advanced DC-DC Converters
- Genetic and Clinical Aspects of Sex Determination and Chromosomal Abnormalities
- Bone health and osteoporosis research
- Optical Systems and Laser Technology
- Ovarian function and disorders
- Technical Engine Diagnostics and Monitoring
- Cardiac Fibrosis and Remodeling
- Heat Transfer and Optimization
- Oil and Gas Production Techniques
- Advanced Battery Technologies Research
Shandong University
2010-2024
Henan University of Science and Technology
2013-2019
Shandong Provincial Hospital
2012-2014
China University of Petroleum, Beijing
2010-2011
A diode-pumped dual-loss-modulated Q-switched and mode-locked (QML) Nd:GdVO4 laser with acousto-optic (AO) modulator Cr4+:YAG saturable absorber is presented. The experimental results show that the QML has nearly 100% modulation depth deeper than 85% of passively pulse. Q-switch pulse energy are measured higher only Cr4+:YAG. stability dual-loss-modulation significantly improved if compared to
Chromosomal polymorphism has been reported to be associated with infertility, but its effect on IVF/ICSI-ET outcome is still controversial. To evaluate whether or not chromosomal in men plays a role spermatogenesis and the of IVF/ICSI-ET, we retrospectively analysed 281 infertile couples. Measures included fertilization rate, implantation pregnancy clinical ongoing early miscarriage rate preterm rate. Men had significantly higher frequencies severe oligozoospermia azoospermia than those...
A diode-pumped actively Q-switched and mode-locked Nd:GdVO4 laser with great average output power high efficiency was realized by using a comparative simple configuration short cavity length. The generates stable pulses of estimated width 240 ps lying underneath envelope 170 ns Q-switch modulation frequency 10 kHz. depth more than 90% the pulse inside has repetition rate 390 MHz.
We present a compact passively Q-switched mode-locked Nd:LuVO4 laser run in Z-type folded cavity with semiconductor saturable absorber mirror (SESAM). The repetition rates of the pulse envelope ranges from 22.99 to 141.18 kHz as pump power increased 2.372 8.960 W. pulses has 111 MHz determined by length and duration is evaluated be 257 ps. An average output 823.5 mW achieved at 8.96 W, corresponding an optical conversion efficiency 9.2%.
A diode-pumped passively Q-switched Nd:Lu0.15Y0.85VO4 crystal laser at 1.34 μm with V:YAG employed as the saturable absorber was demonstrated for first time to our best knowledge. The maximum average output power of 0.529 W achieved under pump 5.6 W, corresponding an opticaloptical conversion efficiency over 9.4% and slope 16%. pulse width shortened 85.6 ns, repetition rate 250 kHz. largest single energy peak were 5.57 μJ 58.74 respectively.
A diode pumped passively mode-locked Nd:LuVO4 laser with a low temperature (LT) In0.25Ga0.75As absorber is realized in this paper. An single-quantum-well absorber, which grown by use of the metal-organic chemical-vapor deposition technique, acts as nonlinear and output coupler simultaneously. special cavity designed to keep power density on under its damage threshold. Both Q-switched continuous-wave (cw) mode locking operation are experimentally realized. average 5.9 W pulse width 4.9 ps...
A stable passive mode-locking Nd:LuAG laser at 1338 nm with a semiconductor saturable absorber mirror (SESAM) is demonstrated for the first time. The yielded maximum average output power of 0.54Wwith slope efficiency 10.2%. corresponding shortest pulse duration was 18.3 ps signal-to-noise ratio 63 dB under repetition rate of46.9MHz. This work indicates that crystal promising candidate realizing picosecond lasers around 1.3 μm spectral region.
The flywheel energy storage system (FESS) with no-load loss as low possible is essential owing to its always running in standby state. In this article, cup winding permanent magnet synchronous machine (PMSM) presented FESS application order eliminate nearly total loss. First, the principle and structure of PMSM put forward based on special rotor. Then, accurately quickly calculate PMSM, magnetic field analytical model established flux density, linkage, back electromotive force accurately,...
A diode-pumped passively Q-switched and mode-locked Nd:GdVO4 laser at 1.34 μm with V3+:YAG as the saturable absorber is realized in a V-type folded cavity. About 100% modulation depth of mode locking can be obtained long pump power reaches oscillation threshold. The width pulse estimated to less than 280 ps 200 MHz repetition rate within an about 980 ns-long envelope. maximum output mW energy 5.7 μJ obtained.
By using LT-GaAs as saturable absorber, we have demonstrated the stable Q-switched and mode-locked (QML) Nd:LuVO4 laser run in a Z-type folded cavity. Nearly 100% modulation depth of mode locking can be obtained long pump power reaches oscillation threshold. The repetition rate passively pulse envelops ranges from 37.5 to 139 kHz increased 1.7 8.2 W. inside envelop has an estimated width about 220 ps 111 MHz. Under incident W, highest energy 6 μJ each envelope, peak 2.73 kW pulses obtained.
Employing an acousto-optic modulator (AOM), the Q-switched laser characteristics of a Tm,Y:CaF2 crystal have been investigated. With T = 1%, 2% and 5% output couplers (OCs), performance in both continuous-wave (CW) Q-switching regimes presented are discussed details. The AOM can run at high repetition rates ranging from 1 kHz to 10 kHz. Under modulation frequency kHz, pulses with shortest duration 280 ns maximum pulse energy 0.335 mJ delivered, corresponding peak power 1.19 kW. results...
We have realized, for the first time to our knowledge, passive Q-switching operation of an LD-pumped Nd:GdVO4 laser at 1342 nm with V:YAG saturable absorber initial transmission as high 96%. This is investigated under different transmissions output coupler. The dependences average power, pulse width, repetition rate, single-pulse energy and peak power on incident pump are also measured. shortest width 80 ns, maximum 19.5 μJ highest 244 W obtained coupler T = 15% 7.93 W. find a special...
By using a piece of codoped Nd3+:Cr4+:YAG crystal as saturable absorber, laser-diode pumped passively Q-switched Nd:YVO4/YVO4 laser has been realized. The maximum output power 2.452 W obtained at the incident pump 8.9 for an 8.8% transmission coupler 1064 nm, corresponding to slope efficiency 30%. other characteristics have also investigated. with absorber lower threshold and higher compared that similar small-signal Cr4+:YAG absorber.
A diode-pumped passively Q-switched mode-locked (QML) intracavity frequency-doubled Nd:GdVO4/KTP green laser with a semiconductor saturable absorber is presented. Nearly 100% modulation depth for the pulses can be achieved at any pump power over 1.92 W. The width of pulse was estimated to about 150 ps. interval within envelope 320 ns and repetition rate 97.5 kHz were obtained, an incident 4.4 inside 140 MHz.
By using a-cut Nd:Lu0.15Y0.85VO4 mixed crystal as laser gain medium, a diode-pumped passively Q-switched and mode-locked (QML) with GaAs saturable absorber in Z-type folded cavity is demonstrated for the first time. The pulses about 90% modulation depth are obtained long pump power reached oscillation threshold. repetition rate of pulse envelope ranges from 50 to 186 kHz increases 0.915 6.520 W. Under an incident 6.52 W, QML largest average output 694 mW, shortest width 200 ns highest energy...
We aimed to study uterine and ovarian morphology, hormonal levels, pituitary height in prepubertal girls with hyperplasia secondary primary hypothyroidism (PH) before after thyroid hormone replacement therapy. investigated 24 severe PH who were divided into 2 groups: (group A, n=18), without B, n=6). Serum levels of free triiodothyronine (FT3), thyroxine (FT4), thyrotropin (TSH), follicle stimulating (FSH), luteinizing (LH), estradiol (E2), testosterone (T) prolactin (PRL), height, volume...
In this paper, the slot/pole number combination of permanent magnet linear synchronous motors (PMLSMs) for flexible conveyor systems (FCS) are selected and analyzed optimization, each PMLSMs consists two types structures: single-sided type double-sided type. Firstly, finite element method (FEM) model is established to compare performance five combinations PMLSMs, best suitable FCS selected.
A diode-pumped Q-switched and mode-locked (QML) Nd:LuVO4/KTP green laser with acousto-optic modulator (AOM) Cr4+:YAG saturable absorber is presented. By inserting an AOM into the cavity, stability of QML pulse AO improved, modulation depth increased width envelope significantly compressed in comparison that singly passively Cr4+:YAG. The experimental results show peak power doubly much higher than pulse.