中国激光, 2013, 40 (8): 0802005, 网络出版: 2013-07-09
亚纳秒脉宽掺镱光纤放大器及其倍频特性研究
Sub-Nanosecond Yb-Doped Fiber Amplifier and Its Second Harmonic Generation Characteristics
激光器 脉冲光纤放大器 主振荡功率放大 三硼酸锂晶体 倍频 lasers pulse fiber amplifier master oscillator power amplifier LBO crystal frequency doubling
摘要
以被动调Q的小型Nd:YAG/Cr4+:YAG激光器为种子光源，以后向抽运的掺镱双包层光纤为功率放大介质，经过一级光纤功率放大，获得了平均功率5.5 W，重复频率9 kHz的激光输出，脉冲宽度为575 ps，峰值功率达到1 MW。采用非临界相位匹配的LBO晶体，对该亚纳秒脉宽光纤放大器进行了单通倍频实验研究。当晶体温度为150.5 ℃、基频光功率为2.7 W时，获得了平均功率1.3 W、峰值功率250 kW的倍频绿光输出，倍频转换效率为48%。
Abstract
A Q-switched Nd:YAG/Cr4+:YAG laser is used to seed a one-stage amplifier featuring backward pumped Yb-doped double-cladding fiber as the power amplifier. Average power of 5.5 W with repetition rate of 9 kHz is achieved, corresponding to pulse duration of 575 ps and peak power of 1 MW. Based on the fiber amplifier at 2.7 W, 1.3 W green laser is obtained by single-pass frequency doubling using non-critical phase matching LBO crystal at 150.5 ℃, and its peak power reaches 250 kW, with conversion efficiency of 48%.
王子薇, 杜松涛, 何晶, 王兆坤, 周军, 魏运荣, 孟俊清, 李骁军. 亚纳秒脉宽掺镱光纤放大器及其倍频特性研究[J]. 中国激光, 2013, 40(8): 0802005. Wang Ziwei, Du Songtao, He Jing, Wang Zhaokun, Zhou Jun, Wei Yunrong, Meng Junqing, Li Xiaojun. Sub-Nanosecond Yb-Doped Fiber Amplifier and Its Second Harmonic Generation Characteristics[J]. Chinese Journal of Lasers, 2013, 40(8): 0802005.
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