二极管泵浦的2 μm高重复频率脉冲固体激光器

LD pumped 2 μm solid-state laser with high pulsed repetition rate

摘要: 报道了连续二极管端面泵浦2 μm高重复频率Tm,Ho:YLF激光器的实验研究结果。792 nm光纤耦合激光二极管作泵浦源，泵浦液氮制冷的Tm,Ho:YLF晶体。动态运转时，平均输出功率达到4 W，相应的能量抽取效率大于85%。采用声光调Q方式，重复频率1～50 kHz可调，10 kHz时，峰值功率达到12 kW，最小脉宽为32 ns。同时，还对二极管泵浦2 μm激光器设计中的各种因素进行了分析。

Abstract: A CW LD end pumped high pulsed repetition rate (PRF) Tm,Ho:YLF laser was reported. The fiber-coupled laser diode of 792 nm as a pumping source pumped the liquid-nitrogen-cooled Tm,Ho:YLF crystal. The average output power of 4 W was obtained and extraction efficiency was more than 85% in dynamic running. The PRF varied from 1~50 kHz by using an A-O Q-switch. The peak power of 12 kW and pulse width of 32 ns were achieved at PRF of 10 kHz. At the same time several important factors in the 2 μm laser design were analyzed.