为了有效缓解闪光灯抽运长脉冲绿激光器中的热透镜效应, 采用矩阵光学理论, 通过高斯光束的矩阵变换, 分析了灯抽运长脉冲激光棒的热透镜效应, 并设计了热透镜不灵敏的V型谐振腔, 进行了理论分析和实验验证, 取得了良好的实验结果。结果表明,通过高斯光束的矩阵变换及模拟分析选择的参量是合适的, 这一结果对于缓解激光器热透镜效应、提高大能量医用激光器的激光性能是有帮助的。

In order to alleviate the thermal lens effect effectively, based on the matrix optics, thermal lens effect in a flash-pumped long-pulse green laser was analyzed with matrix transformation of Gaussian beam and a V-type cavity insensitive to thermal lens was designed. It was analyzed in theory and verified in experiments. The results show that it is reasonable to select parameters according to the matrix transformation of the Gaussian beams and the analytical simulation. This result is helpful for the alleviation of thermal lens effect and the improvement in performance of high energy medical lasers.