高功率固体激光系统棒状放大器的热畸变理论  

The Thermal Distortion Theory of the Rod Amplifier in the High-power Solid Laser System

作　　者：张华[1] 黄国松[1] 徐世祥[1] 高艳霞[1] 范滇元[1] 

机构地区：[1]中国科学院上海光机所高功率激光物理国家实验室,上海201800

出　　处：《中国激光》1997年第12期1061-1067,共7页Chinese Journal of Lasers

基　　金：国家高技术863-416主题资助项目

摘　　要：建立了从棒状放大器能量沉积分布研究其热畸变理论的计算机模拟程序.可以计算棒状放大器泵浦期间和泵浦结束之后冷却过程中激光棒内的温度分布、应力分布、折射率分布以及激光束的退偏量、平均光束发散角和位相畸变.用哈特曼网格法测量了氙灯泵浦对激光波面的影响以及放大器的冷却过程.测量结果与计算结果一致.A mode] program is established to investigate the thermal distortion of the Nd : glass rod amplifier from its deposited energy distribution. This program can be used to calculate the temperature profile, stresses distribution, refractive index distribution, depolarization and phase aberration during the pumping and the cooling down processes. The influence of the pumping on laser wavefront has been measured with a Hartmann wavefront sensor. Meanwhile, the transient temperature profile has also been measured by the Hartmann wavefront sensor. The experiment is in good agreement with the calculation.

关 键 词：固体激光系统 泵浦 热畸变 激光棒 棒状放大器 

分 类 号：TN245[电子电信—物理电子学] TN241