The authors report on the performance and scalability of a Q-switched, cryogenically cooled Ho:YAG laser. The Ho:YAG slab was resonantly pumped using a continuous wave thulium fibre laser, and the output energy from the oscillator was extracted using a confocal resonator with a single-pass pump geometry, resulting in 135 mJ at 200 Hz with a beam quality of M 2 < 1.14 and a slope efficiency of 66%. A maximum output energy of 165 mJ at 200 Hz was achieved. This first demonstration of a Q-switched cryogenically cooled Ho:YAG laser at high repetition rates shows great potential for further power and energy scaling.

中文翻译：

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低温冷却、Ho:YAG、调Q激光器

作者报告了调Q、低温冷却的Ho:YAG 激光器的性能和可扩展性。使用连续波铥光纤激光器对 Ho:YAG 板进行共振泵浦，并使用具有单通泵浦几何形状的共焦谐振器提取振荡器的输出能量，从而在 200 Hz 时产生 135 mJ，光束质量为 M 2 < 1.14，斜率效率为 66%。在 200 Hz 时实现了 165 mJ 的最大输出能量。高重复频率下 Q 开关低温冷却 Ho:YAG 激光器的首次演示显示出进一步功率和能量缩放的巨大潜力。