138 W窄脉宽全固态绿光激光器  

138 W Narrow Pulse-Width Solid-State Green Laser Operation

作　　者：王暖让[1] 王灿召[1] 苑利钢[2] 姜东升[2] 杨苏辉[1] 赵长明[1] 

机构地区：[1]北京理工大学光电工程系 [2]华北光电技术研究所,北京100015

出　　处：《中国激光》2006年第8期1017-1020,共4页Chinese Journal of Lasers

基　　金：国防科技重点实验室基金(514380603BQ0102)资助项目

摘　　要：报道了绿光平均功率达138 W的声光调Q内腔倍频全固态Nd∶YAG绿光激光器。为了进一步提高绿光激光器的输出功率以及压窄脉宽,通过倍频晶体相位匹配角随温度变化的分析以及腔型的研究,设计并优化了U型谐振腔。实验中采用两个聚光腔,每个聚光腔由35个20 W的高功率激光二极管(LD)侧面抽运Nd∶YAG棒,利用Ⅱ类相位匹配KTP晶体腔内倍频,实现了高平均功率内腔倍频激光器的稳定运转。在两个聚光腔的激光二极管抽运电流分别为18.5 A,20.5 A时,获得了重复频率为10 kHz,脉冲宽度优于49 ns,输出功率为138 W的高功率、高重复频率、窄脉宽绿光(532 nm)输出,光-光转换效率为14.1%,不稳定度为±2.8%。An average power of 138 W green beam operation by intracavity frequency doubling of acousto-optic Qswitch solid-state Nd：YAG laser is reported. An U type resonator is designed and optimized in order to compress pulse-width and increase the average power. Two Nd：YAG rods were employed and a type Ⅱ phase matched KTP crystal （4 = 25°, θ = 90° under the condition of 24 ℃, the size is 7 mm×7 mm×7 mm） was applied for frequency doubling. Under the pumping currents of 18.5 A and 20.5 A, a maximum green power of 138 W was generated at 10 kHz repetition rate and 49 ns pulse-width, leading to 14.1% of optical-optical conversion efficiency and ± 2.8% instability.

关 键 词：激光技术 ND:YAG激光器 U型谐振腔 532 nm绿光 内腔倍频 窄脉宽 

分 类 号：TN248.1[电子电信—物理电子学]