中国激光, 2010, 37 (S1): 24, 网络出版: 2010-10-29  

连续激光二极管侧面抽运高重复频率大能量被动调Q激光器

High Repetition Rate and Large Energy Passively Q-Switched Laser Side-Pumped by Continous-Wave Laser Diode
作者单位
长春理工大学理学院, 吉林 长春 130022
摘要
报道了高重复频率大能量连续激光二极管(LD)侧面抽运Cr4+YAG被动调Q Nd:YAG激光器。把工作物质等效为厚透镜, 根据ABCD定律计算了平平腔、平凹腔、平凸腔中激光束的模参数, 通过对比基模体积, 选择了平凸腔结构。实验中获得了高重复频率大能量被动调Q激光, 并实现了TEM00模运转。当抽运功率为136.20 W时, 被动调Q激光单脉冲能量达到2.46 mJ, 峰值功率24.36 kW, 脉冲重复频率4.22 kHz, 脉冲宽度101 ns, 脉冲幅度抖动约为5%, 频率抖动约为5%, 光束远场发散角小于1.5 mrad, 光束质量M2因子约为1.3。
Abstract
High repetition rate and large energy passively Q-switched Nd:YAG laser side-pumped by continous-wave (CW) laser diode is reported by using Cr4+YAG crystal as saturable absorbers. Regarding operation material as thermal thick lens, the laser beam parameters of plane-plane cavity, plano-concave cavity and plano-convex cavity are calculated according to the ABCD matrix theory of resonators. By comparing the fundamental mode volume, plano-convex cavity is selected. A high repetition rate and large energy passively Q-switched laser beam is obtained, and the TEM00 mode is achieved. A single pulse energy of 2.46 mJ, peak power of 24.36 kW, repetition rate of 4.22 kHz, pulse width of 101 ns are obtained at a pump power of 136.20 W, the amplitude fluctuation and frequency fluctuation are about 5%, the corresponding M2 factor is about 1.3, and the beam divergence angle of far-field is less than 1.5 mrad.

郭家喜, 金光勇, 王超, 陈薪羽, 于永吉, 王奕博, 郝大伟. 连续激光二极管侧面抽运高重复频率大能量被动调Q激光器[J]. 中国激光, 2010, 37(S1): 24. Guo Jiaxi, Jin Guangyong, Wang Chao, Chen Xinyu, Yu Yongji, Wang Yibo, Hao Dawei. High Repetition Rate and Large Energy Passively Q-Switched Laser Side-Pumped by Continous-Wave Laser Diode[J]. Chinese Journal of Lasers, 2010, 37(S1): 24.

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