大能量短纳秒脉冲Nd YAG激光 杨熙航.pdf

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激光与光电子 光器。激光器包括纳秒电光调 Q 振荡器和两级侧面泵浦 Nd: YAG 棒状放大器。振荡级采用
Nd: YVO4 晶体作为增益介质可减少热致双折射效应并降低腔内损耗。放大级采用两级串联
放大的方式以提高放大倍数。最终，在脉冲重复频率为 10 Hz 时，获得了最大单脉冲能量
377 mJ，脉冲宽度 ns，平均光束质量因子𝑀2 = 1064 nm 激光输出。这种大能量、
窄脉宽、高光束质量激光器有望用于远距离高精度的激光测距。
关键词：大能量，电光调 Q，窄纳秒脉宽，激光放大器

High energy side-pumped narrow nanosecond pulses Nd: YAG laser
amplifier
Yang Xihang1,3, Zhou Zihan1,3, Wang Zhimin1,*, Cui Dafu1,2, Peng Qinjun1,2
1 Key Lab of Solid State Laser, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing
100190, China
2 Key Lab of Function Crystal and Laser Technology, Technical Institute of Physics and Chemistry, Chinese
Academy of Sciences, Beijing 100190, China
3 Institute of Optical Physics and Engineering Technology, Qilu Zhongke, Jinan 250000, China；
4 University of Chinese Academy of Sciences, Beijing 100190, China
Abstract：We reported a high energy, high beam quality laser diode (LD) side-pumped narrow
nanosecond pulses Nd: YAG laser amplifier. The amplification system consists of a nanosecond
electro-optic Q-switched oscillator and a two-stage side-pumped Nd: YAG rod amplifier. The
oscillation stage uses Nd: YVO4 crystal as the gain medium to reduce thermally induced
birefringence and reduce intra-cavity losses. The amplification stage adopts a two-stage
amplification structure to i