中国激光, 2013, 40 (10): 1002014, 网络出版: 2013-09-06
高稳定性半导体激光侧面抽运Nd:YAG 300 Hz再生放大器
High Stability Laser Diode Side-Pumped Nd:YAG 300 Hz Regenerative Amplifier
激光器 Nd:YAG晶体 激光二极管抽运 再生放大器 热透镜焦距 lasers Nd:YAG crystal laser diode pumped regenerative amplifier thermal focal length
摘要
提出了一种测量激光晶体热焦距的装置和方法,并以此设计和实现了一台采用平平腔结构激光二极管阵列侧面抽运Nd:YAG再生放大器。通过注入脉冲宽度为2 ns、中心波长为1064 nm、重复频率为300 Hz的300 pJ小信号种子光,实现了脉冲宽度为2 ns,单脉冲能量1.5 mJ的基横模激光输出。总放大倍数为5×106,输出能量稳定性为1.08%[方均根值(RMS)],方波扭曲度为1.10。
Abstract
A new method is proposed to measure the thermal focal length of laser crystal. Based on the experimental results, a laser diode (LD) side-pumped, flat-flat cavity regenerative amplifier is developed. By injecting a small signal seed light with wavelength of 1064 nm, pulse width of 2 ns, repetition rate of 300 Hz and pulse energy of 300 pJ, the output TEM00 laser with maximum pulse energy of 1.5 mJ, pulse width of 2 ns is obtained. The corresponding amplification ratio is 5×106, and the output energy stability is 1.08% [root-mean-square (RMS)] with the square-pulse distortion of 1.10.
张若凡, 韦辉, 王江峰, 范薇, 李学春. 高稳定性半导体激光侧面抽运Nd:YAG 300 Hz再生放大器[J]. 中国激光, 2013, 40(10): 1002014. Zhang Ruofan, Wei Hui, Wang Jiangfeng, Fan Wei, Li Xuechun. High Stability Laser Diode Side-Pumped Nd:YAG 300 Hz Regenerative Amplifier[J]. Chinese Journal of Lasers, 2013, 40(10): 1002014.