共查询到16条相似文献,搜索用时 93 毫秒
1.
2.
3.
4.
5.
6.
7.
8.
9.
利用Nd∶YAG/Cr∶YAG/YAG键合晶体,建立了具有高平均输出功率的LD侧面泵浦被动调Q激光器系统.当Cr∶YAG的初始透过率为85%、最大泵浦光功率为187.5 W时,1 064nm激光的平均输出功率为83.68W.通过KTP晶体进行倍频,在最大泵浦光功率下,产生了27.2W532nm绿光激光脉冲,同时脉冲宽度和重复频率分别为210ns和21.2kHz;绿光单脉冲能量和峰值功率分别为1.28mJ和6.1kW;泵浦光(808nm)到倍频光(532nm)的光-光效率为14.5%. 相似文献
10.
11.
Numerical Modelling of QCW-Pumped Passively Q-Switched Nd:YAG Lasers with Cr^4+:yAG as Saturable Absorber 下载免费PDF全文
Passively Q-switched quasi-continuous-wave (QCW) diode-pumped Nd:YAG laser with Cr^4+ :YAG as saturable absorber is numerically investigated by solving the coupled rate equations. The threshold pump rate for passively Q-switched QCW-pumped laser is derived. The effects of the pump rate and pump-pulse duration on the laser operation characteristics are studied theoretically. The pump power range can be estimated according to the number of output pulses. The numerical simulation results are in good agreement with the experimental results. 相似文献
12.
ZHANG Qidi ZHAO Shengzhi ZHANG Xingyu WANG Qingpu ZHENG Jia'an SUN Lianke ZHANG Shaojun 《中国光学快报(英文版)》2000,9(6)
Cr4+:YAG is a new saturable absorber for passive Q-switching. As a passive Q-switcher, it has several excellent properties, such as low saturation fluence, high damage threshold, good thermal conductivity, no degradation and so on. By using a laser-diode as pumping source and Cr4+ :YAG as passive Q switcher, the passive Q-switching run in Nd: Sr5(VO4)3F laser at 1. 065 μm is realized. The average output power, the single pulse energy, the pulse width and the repetition rate for different small-signal transmission of Cr4+:YAG and different pumping power were measured. Meanwhile, the coupling rate equations for Cr4+:YAG as passive Q-switcher were given and the experimental results agreed with the numerical solution of equations. 相似文献
13.
ZHANG Xingyu ZHAO Shengzhi WANG Qingpu ZHANG Qidi B. Ozygus M. Weber 《Chinese Journal of Lasers》2000,9(3):193-200
In this paper, the stability of a laser-diode-pumped Cr4+:YAG passively Nd3+:YAG Q-switched laser and the influence of the transversal mode structure on the stability are investigated. With the laser operating in TEM00 mode, the pulse energy fluctuation and the repetition rate fluctuation as functions of the repetition rate are measured, and semi-quantitatively and qualitatively analyzed, respectively. 相似文献
14.
利用新型实用的晶体材料V∶YAG作为被动调Q元件,实现了激光二极管泵浦Nd∶YVO4的1.34 μm激光谱线调Q运转.研究了饱和吸收体小信号透过率对激光稳定性的影响,得出使用小信号透过率T0小的V∶YAG可使激光脉冲能量和重复频率稳定的结论.在1.6 W的泵浦条件下,T0为96%、89%和85%时,4 h脉冲能量和重复频率稳定性分别为15%、10%和5%.使用T0为85%的V∶YAG,获得了平均功率输出功率96 mW,脉宽8.8 ns,重复频率25 kHz,峰值功率436 W,脉冲能量3.84 μJ的实验结果. 相似文献
15.
理论和实验研究了LD泵浦Nd∶Gd0.42Y0.58VO4/Cr4+∶YAG被动调Q锁模激光器.在分析Cr4+∶YAG晶体能级结构和调Q锁模物理过程的基础上,通过数值模拟给出了Cr4+∶YAG调Q锁模的参量要求,然后进行了实验验证.实验中Cr4+∶YAG的初始透过率T0分别为86.3%、95%,输出镜的透过率T分别为10%、20%,在其他条件不变的情况下构成四种不同的组合,均实现了激光器的调Q锁模运转.实验结果表明,降低Cr4+∶YAG的初始透过率T0或提高输出镜透过率T有利于获得较好的锁模效果,与理论分析一致. 相似文献
16.
An LD-pumped Nd:YVO4 passively Q-switched by V:YAG and intracavity frequency doubled by LBO red pulse laser at 671 nm was presented. With 1.6 W incident pump power, average output power of 53 mW, pulse duration (FWHM) of 29.5 ns, pulse repetition rate of 37.2 kHz, peak power of 48.3 W and single-pulse energy of 1.43 μJ were obtained. The stability of pulse energy and repetition rate was better than 3% for 4 h. 相似文献