电光调Q双脉冲输出Nd：YAG全固态激光器  

Electro-Optical Q-Switched Double-Pulse Output Nd:YAG All Solid-State Laser

作　　者：李峰[1] 王君涛[1] 殷苏勇[1] 朱小磊[1] 

机构地区：[1]中国科学院上海光学精密机械研究所,上海市全固态激光器与应用技术重点实验室,上海201800

出　　处：《中国激光》2012年第8期21-25,共5页Chinese Journal of Lasers

摘　　要：设计了激光二极管(LD)双端面抽运传导冷却复合Nd:YAG晶体电光调Q激光器,实现脉冲间隔可调的双Q脉冲输出。用两个光纤耦合输出的LD模块作为抽运源,偏硼酸钡(BBO)晶体作为Q开关,在一个抽运周期内两次启动Q开关,获得脉冲能量大于14mJ,脉宽小于等于18ns,脉冲间隔200～230μs可调的双Q脉冲输出,激光器重复频率50Hz,光-光转换效率达到24%。探索了用磷酸二氘钾(KD*P)调Q晶体开关实现稳定双脉冲输出的可行性,通过抑制压电环效应,消除子脉冲现象,最终获得脉冲能量约11mJ,脉宽小于等于18ns。A laser diode （LD） dual-end pumped, conductively cooled, electro-optical Q-switched composite Nd：YAG laser is designed. Double-pulse laser output with adjustable pulse interval is achieved. By using two fiber-coupled LD modules as the pumping source, β-BaB204 （BBO） crystal as the Q-switch, double-pulse laser output is acquired by opening the Q-switch twice in a pumping cycle time, and the laser is capable of producing two Q-switched 1064 nm pulses with the single pulse energy more than 14 mJ, 18 ns, the interval between the two pulses is adjustable from 200 μs to 230 μs at the repetition of 50 Hz, the optical-to-optical efficiency reaches 24 %. Furthermore, we explore the feasibility of stable double-pulse laser output by using the Q-switched crystal KD2 PO4 （KD P）, and suppressing the piezoelectric ring effect of KD＂ P, the sub-pulse phenomenon is removed and double-pulse laser output with 11 m J, 18 ns, is obtained.

关 键 词：激光技术 ND:YAG激光器 双脉冲激光 磷酸二氘钾调Q 偏硼酸钡调Q 

分 类 号：TN248.1[电子电信—物理电子学]