Yb:YAG薄片激光器多通泵浦耦合系统设计与实验

 介绍了基于Yb:YAG薄片的16通泵浦耦合系统的设计方法，建立了泵浦系统的模型，对模型进行了模拟。以16通泵浦耦合系统为基础，通过微通道冷却，利用国产单片直径10 mm、厚度为250 μm、掺杂原子分数为10% 的Yb:YAG薄片进行了实验研究。在泵浦功率为69.5 W时，采用曲率半径为－800 mm的输出镜，获得了27 W的1 030 nm连续激光输出，光光转换效率为38.8%；采用曲率半径为－2 000 mm的输出镜，获得了18.65 W的1 030 nm连续激光输出，光束质量平分因子小于等于1.1，光光转换效率为26.8%。

Design and experiment of multi-pass pump system for Yb:YAG thin-disk laser

The design of a 16 pass pump system for Yb:YAG thin-disk laser has been presented. The model of the system was built and simulated. Experiments based on the system using one disk cooled with water through micro channel were done. The disk was homemade, with the diameter of 10 mm, thickness of 250 μm and doping atom fraction of 10%. For the pump power of 69.5 W, when a reflector with the radius of curvature of －800 mm is used, 24.4 W 1 030 nm continuous output is achieved, with optical to optical conversion efficiency of 38.8%; when a reflector with the radius of curvature of －2 000 mm is used, 18.65 W 1 030 nm continuous output is achieved, with the beam quality factor no more than 1.1 and optical to optical conversion efficiency of 26.8%．