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5.5W,重复频率9kHz的激光输出,脉冲宽度为575ps,峰值功率达到1MW。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2.7W时,获得了平均功率1.3W、峰值功率250kW的倍频绿光输出,倍频转换效率为48%。
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 %.
出处
《中国激光》
EI
CAS
CSCD
北大核心
2013年第8期24-29,共6页
Chinese Journal of Lasers
基金
国家863计划(2011AA030201)
国家自然科学基金(60908011,60907045)
国家重大科技专项(2010ZX04013)
关键词
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
