阵列口径Nd:YAG片状激光器重复频率输出特性研究  

Performances of repetition-rated output of multi-segment-aperture solid-state lasers

作　　者：徐美健[1] 於海武[1] 袁晓东[1] 段文涛[1] 蒋新颖[1] 林东晖[1] 曹丁象[1] 

机构地区：[1]中国工程物理研究院激光聚变研究中心,四川绵阳621900

出　　处：《强激光与粒子束》2007年第7期1134-1138,共5页High Power Laser and Particle Beams

基　　金：中国工程物理研究院重大基金资助课题(Z0405)

摘　　要：介绍了一种新型阵列口径的固体片状激光器的设计及初步实验,研究了其激光输出特性。激光器采用2×1阵列的以布儒斯特角放置的片状Nd:YAG激光头模块,并采用氙灯泵浦方式,由平均功率为60kW电池组电源供电;电源采用大电流恒流放电,对输出放电进行可编程控制。实验得到32 J的单脉冲输出,小信号增益系数为0.047 5 cm-1;泵浦单脉冲运行,脉宽为1～5 ms时,输出能量呈线性增长;当重复频率为20Hz时,5 ms脉宽比1 ms脉宽输出功率下降30%,其原因是布儒斯特角结构存在时,由热应力引起的热致双折射损耗造成输出下降。Based on multi-segment apertures and gain media of Nd：YAG slabs, a new design of solid-state laser oscillator and its preliminary experimental results are presented. The output characteristics of the laser are researched. 2×1 multi-segment apertures and gain media of Nd： YAG slabs module are applied to the laser which is supplied by a 60 kW battery-based power supply, which adopts a pattern of constant current discharge with high current, and outputs a programmable control wave profile. The single pulse with output of 32 J was obtained, and the small signal gain was 0. 047 5 cm^-1. The output results show that it is a linear relation of the output energy and the pumping pulse duration during a single shot. And the output energy of 5 ms pulse nearly falls off 30% than that of the 1 ms pulse in repetition-rates modes.

关 键 词：固体激光器 激光振荡器 重复频率激光 ND:YAG 片状介质 

分 类 号：TN248.13[电子电信—物理电子学]