We present significantly improved performance data of a diode-pumped $Q$-switched Alexandrite laser in single longitudinal mode operation developed as a beam source for resonance lidar systems. The average output power of the laser—operating at the potassium resonance at 770 nm with a linewidth below 10 MHz—could be increased by a factor of five to the Watt-level by means of an optimized resonator design and pump scheme. The pulse energy is 1.7 mJ with a beam quality of ${\mathrm{M}}^2\le 1.1$ in both spatial directions at a repetition rate of 500 Hz.

中文翻译：

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二极管泵浦的Q开关Alexandrite激光器以瓦特级输出功率进行单纵模工作

我们展示了二极管泵浦性能的显着改善 $问$单纵模工作的激光开关亚历山大激光器作为共振激光雷达系统的光束源而开发。通过优化的谐振器设计和泵浦方案，可以将激光器的平均输出功率（在770 nm的钾离子谐振下，线宽低于10 MHz的情况下）提高到瓦特水平的五分之一。脉冲能量为1.7 mJ，光束质量为${\mathrm{中号}}^{\mathrm{2个}}\le 1.1$ 在两个空间方向上的重复频率为500 Hz。