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%。

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%.