本文研究了脉冲固体激光器的YAG激光棒光泵浦动态热效应对激光波面的影响。采用激光干涉测量方法得到了YAG激光棒在脉冲光泵浦时的瞬态干涉图和泵浦后的时间序列干涉图,并用计算机进行图像处理和计算,得到三维时间序列畸变波面图和激光棒的热焦距随时间变化的曲线。

The influence of dynamic thermal effect induced by optical pumping of YAG crystal rod in a pulsed solid laser on the wave front of the output laser beam is studied in this paper. A series of time-resolved instantaneous interferograms during and after the pumping are obtained with a Mach-Zehnder interferometer, and three-dimensional time-resolved pictures of the distortion wave surfaces and the curve of thermal focal length of laser rod versus time are gained after the treatmant and calculation for interferograms, and the curve is explained.