85 W高稳定全固态绿光激光器的研究  

High-Stabilization 85 W All-Solid-State Green Laser Operation

作　　者：徐德刚[1,2] 姚建铨[1,2] 陈进[1,2] 张百钢[1,2] 于意仲[1,2] 温午麒[1,2] 郭丽[1,2] 周睿[1,2] 王鹏[1,2] 

机构地区：[1]天津大学精密仪器与光电子工程学院,天津300072 [2]南开大学,天津大学联合研究院,天津300072

出　　处：《中国激光》2004年第4期385-389,共5页Chinese Journal of Lasers

基　　金：国家科技部"86 3计划"项目 ( 2 0 0 2AA11190 );天津市光电子联合科学研究中心项目( 0 13184 0 11);教育部南开大学;天津大学科技合作基金项目资助;天津大学优秀博士学位论文基金项目资助

摘　　要：研究了平均功率达 85W高功率高稳定性全固态绿光激光器 ,从理论上分析了全固态内腔倍频晶体热效应相位失配对输出功率的影响 ;数值模拟了倍频晶体内部的热量分布 ,计算了倍频晶体相位匹配角随温度变化的失配量。在实验中 ,采用 80个 2 0W的高功率半导体激光器侧面抽运单Nd∶YAG棒 ,采用双声光Q开关、高效平凹谐振腔结构 ,对大尺寸KTP晶体进行角度偏离法补偿相位失配并配合强冷却等技术 ,实现高功率内腔倍频激光器的稳定运转 ;在抽运电流为 17 3A时 ,实现了重复频率为 2 0 4kHz,脉冲宽度 2 30ns,输出功率为 85W的高功率、高重复频率绿光 ( 5 32nm)输出 ,不稳定性为± 1 0 3% ,光 光转换效率为 9 7%。This paper reported high power high stabilization 85 W all solid state green laser operation, which was pumped by 80×20 W high power laser arrays. The theoretical analysis of the influence of thermal effect and phase mismatching about frequency doubling crystal on output was presented. The calorific power distribution is numerically simulated and the values of frequency doubling crystal phase mismatching varying with the change of temperature were given. In experiment, double acousto optic Q switching were employed inside single Nd∶YAG rod, high efficiency flat concave intracavity frequency doubled resonance structure. A maximum green power of 85 W was generated at 20.4 kHz repetition rate and 230 ns pulse width when pumped current of laser diodes was 17.3 A with compensating phase mismatch by angle departuring and strong cooling big KTP crystal, leading to ±1.03% instability and 9.7% of optical optical conversion efficiency.

关 键 词：激光技术 全固态绿光激光器 角度偏离补偿相位失配法 双声光Q开关 KTP倍频晶体 

分 类 号：TN248.13[电子电信—物理电子学]