摘要
钕玻璃激光器采用双灯、对称紧耦合非聚焦泵浦腔,激光棒的冷却通道与闪光灯的水冷却通道分开且相互独立。用重复频率10Hz、脉冲宽度250μs的两盏闪光灯,同时进行侧面对称抽运,抽运功率900W。激光器先后以热容方式及常规水冷方式运行10s,分别记录100个光脉冲的脉冲能量和100个光脉冲的光斑图像。通过对比分析,热容方式运行的钕玻璃激光器的平均输出功率及单脉冲能量都高于常规运行方式,约为1.4倍,而热容方式运行的钕玻璃激光器具有显著的热负透镜效应,有别于常规方式运行的热正透镜效应。最后再结合理论计算,验证了热容激光器在抽运阶段输出的全部脉冲串能量的理论值。本结果对进一步了解钕玻璃激光器热容工作方式运行的输出特性具有一定的参考价值。
The designing construction of Nd： glass laser cavity is double flashlamp pumped, symmetrical, close coupling and unfocused. The cooling channels of Nd：glass rod is separated from water-cooling channels of flashlamp independently. Through 10s experiment,pulse energy and laser beam patterns have been measured at 10Hz repetition rate and 250~s pulse duration of two flashlamp for 900W pump power in heat capacity operation and general water-cooling op- eration successively. The contrastive facular pictures show that the thermal lens effect of heat capacity operation is negative lens effect not same as positive effect of general water-cooling operation. The contrastive results show that the output energy and average output power of heat capacity operation are greater than general water-cooling operation,about 1.4 multiple. The obtained result is favor of the deferent characteristic of Nd：glass laser in heat capacity operation.
出处
《激光与红外》
CAS
CSCD
北大核心
2006年第4期257-260,共4页
Laser & Infrared
