We address the power scaling issue in end-pumped laser rod amplifiers by studying, experimentally and numerically, the magnitude of thermal lensing in a high-energy diode-pumped Yb:YAG crystal. The spatio-temporal temperature profile of the gain medium and the focal length of the induced thermal lens are determined numerically. The influence of the repetition rate and pumping power on the temperature distribution is analyzed. Experimental measurements covered repetition rates between 1 and 10 Hz and up to 4 kW pumping power.

中文翻译：

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二极管泵浦 10 Hz 100 mJ Yb:YAG 放大器中的热透镜分析

我们通过实验和数值研究高能二极管泵浦 Yb:YAG 晶体中热透镜的幅度来解决端部泵浦激光棒放大器中的功率缩放问题。增益介质的时空温度分布和感应热透镜的焦距以数值方式确定。分析了重复频率和泵浦功率对温度分布的影响。实验测量涵盖了 1 到 10 Hz 之间的重复率和高达 4 kW 的泵浦功率。