摘要
利用激光二极管(LD)端面抽运Nd∶YVO4激光晶体皮秒三倍频355nm全固态紫外激光器,采用半导体可饱和吸收镜(SESAM)锁模技术及皮秒再生放大技术,对1 064nm基波采用Ⅰ类相位匹配Li3B3O5(LBO)晶体二倍频和Ⅱ类相位匹配LBO晶体三倍频,获得了稳定性好、倍频效率较高的355nm紫外激光输出。当二极管泵浦功率为5 W时,获得了脉宽为17ps、重复频率为1Hz、单脉冲能量为129.6μJ的稳定三倍频紫外激光输出,基频光到二倍频光和三倍频光的转换效率分别达到60.3%和16.6%,3h输出单脉冲能量的抖动在0.58%以下。
A laser diode （LD） end-pumped Nd ： YVO4 all-solid-state ultraviolet picosecond（PS） pulse laser was demonstrated under the semiconductor saturable absorption mirror（SESAM） mode-locking technology and the PS pulse laser regeneration amplifier technology, by using the type I phase- matched LiB3O5 （LBO） as the second harmonic generation（SHG） crystal and the type Ⅱ phase- matched LBO as the third harmonic generation（THG） crystal. Finally, the 355 nm UV laser was ob- tained with 129.6 μJ single pulse energy, 17 ps pulse width at 1Hz repetition rate while the pump power was 5 W. The third harmonics were up to 60.3% conversion to 532nm and 16.6% to 355nm and the single pulse energy fluctuation was less than 0.58% in 3h operation.
出处
《应用光学》
CAS
CSCD
北大核心
2012年第4期804-807,共4页
Journal of Applied Optics
基金
国家863计划项目
关键词
紫外激光器
LD泵浦
皮秒激光
三倍频
LBO晶体
ultraviolet laser
LD pumped
pico-second
third harmonic generation（THG）
LBOcrystal
