A Tm,Ho:YVO₄ laser with compact geometry was demonstrated and analyzed. For the continuous wave laser, the slope efficiency of 30.5% was achieved. By inserting a Cr:ZnS saturable absorber into the cavity, the passively Q-switched laser generated almost constant pulse duration of 83 ns with the slope efficiency of 19.3%. The pulse energy was also independent of the pump power, around 130μJ. Through increasing the pump power from 3.7 W to 8.1 W, the pulse repetition varied approximately linearly from 2.9 kHz to 6.8 kHz. The Q-switch efficiency of the PQS laser is up to 58% at the maximum pump power.

中文翻译：

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一种紧凑的被动调Q Tm-Ho 共掺杂晶体激光器，2 µm 脉冲宽度窄

演示和分析了具有紧凑几何形状的 Tm,Ho:YVO ₄激光器。对于连续波激光器，实现了 30.5% 的斜率效率。通过将 Cr:ZnS 可饱和吸收器插入腔体，被动调Q激光器产生几乎恒定的 83 ns 脉冲持续时间，斜率效率为 19.3%。脉冲能量也与泵浦功率无关，约为 130μJ。通过将泵浦功率从 3.7 W 增加到 8.1 W，脉冲重复从 2.9 kHz 到 6.8 kHz 近似线性变化。在最大泵浦功率下，PQS 激光器的调Q 效率高达58%。