Peak-power enhancement of a cavity-dumped cesium-vapor laser by using dual longitudinal-mode oscillations.
Peak-power enhancement of a cavity-dumped cesium-vapor laser by using dual longitudinal-mode oscillations.
复制标题
使用双纵模振荡增强倾腔铯蒸气激光器的峰值功率。
DOI：
10.1364/oe.409022
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发表时间：
2020
期刊：
影响因子：
3.8
通讯作者：
M. Endo
中科院分区：
文献类型：
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作者：
M. Endo
我们进行了腔倒空二极管泵浦碱金属激光器（DPAL），并观察到锯齿状结构的脉冲波形，似乎是由两个或两个以上的纵模之间的干涉。我们已经证实了多模振荡是由空间烧孔引起的，当只有两个振荡模式时，可以看到最大的峰值。这种现象可能有助于增强DPAL的腔倒空，但并不总是被观察到。因此，我们开发了一个数值模拟来预测在给定的一组条件下激发的纵向模式的数量，并提供指导方针，以促进双模振荡。使用这些准则，我们已经获得了一个脉冲的峰值功率为250 W，这是高于平均功率循环在腔中，是一个38倍的连续波（CW）输出增强。
We have performed cavity dumping of a diode-pumped alkali laser (DPAL) and have observed a saw-like structure in the pulse waveform that appears to be caused by interference between two or more longitudinal modes. We have confirmed that multimode oscillations are caused by spatial hole burning, and the largest peak was seen when only two oscillation modes were present. This phenomenon may be useful for enhancing the cavity dumping of the DPAL, but it was not always observed. Therefore, we developed a numerical simulation to predict the number of longitudinal modes excited under a given set of conditions and provides guidelines to facilitate dual-mode oscillation. Using these guidelines, we have obtained a pulse with a peak power of 250 W, which is higher than the average power circulating in the cavity and is a 38-fold enhancement of the continuous-wave (CW) output.