A doubly Q-switched and mode-locked (QML) laser at 1.3 μm with an acousto-optic modulator and molybdenum selenide saturable absorber is presented. Stable QML pulses with repetition rate of 1 kHz are obtained. The variation in output characteristics with pump power is investigated. A pulse energy of 550 μJ and a Q-switched envelope width of 155 ns are achieved at 12 W. Compared with those in the singly QML state, the Q-switched envelope width is reduced by 92% and the pulse energy increases 33 times in the doubly QML state.

中文翻译：

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使用声光调制器和硒化钼的 1.3 μm 双调 Q 和锁模激光器

提出了具有声光调制器和硒化钼可饱和吸收器的 1.3 μm 双调 Q 和锁模 (QML) 激光器。获得了重复率为 1 kHz 的稳定 QML 脉冲。研究了输出特性随泵功率的变化。在 12 W 下实现了 550 μJ 的脉冲能量和 155 ns 的 Q 开关包络宽度。 与单 QML 状态相比，Q 开关包络宽度减少了 92%，脉冲能量增加了 33 倍双重 QML 状态。