We report on the average power increase of a repetitively pulsed (10 Hz) nanosecond 3-µm laser due to the compensation of a strong thermal lens in the Cr:Er:YSGG laser cavity maintaining the megawatt-level peak power. Thermally-induced beam distortions are measured in a set of 3-µm erbium crystals (Er:YAG, Er:YSGG, Cr:Er:YSGG), a scheme for compensating a thermal lens in a Cr:Er:YSGG Q-switched laser with a pulse energy of 23 mJ at a repetition rate of 10 Hz in with low-order transverse mode beam is proposed and experimentally implemented. The developed approach makes it possible to control the cavity mode in high-power nanosecond 3-µm lasers with flashlamp or diode pumping, which are used for a variety of scientific and technological applications, including pumping laser crystals in the middle infrared range, as well as laser-induced microstructuring and tissue engineering.

我们在一个重复脉冲（10赫兹）纳秒3-的平均功率增加报告μ米激光由于Cr的一个强有力的热透镜的补偿：二：YSGG激光腔保持兆瓦级的峰值功率。在一组3 µm的crystal晶体（Er：YAG，Er：YSGG，Cr：Er：YSGG）中测量热引起的光束畸变，这是一种通过Cr：Er：YSGG Q开关补偿热透镜的方案。提出并以低阶横向模光束重复频率为10 Hz的重复频率为23 mJ的脉冲激光。所开发的方法使得可以在高功率纳秒3- µ中控制腔模式。m具有闪光灯或二极管泵浦的激光器，用于多种科学和技术应用，包括泵浦中红外范围的激光晶体，以及激光诱导的微结构和组织工程。