85 W高稳定全固态绿光激光器的研究

徐德刚; 姚建铨; 陈进; 张百钢; 于意仲; 温午麒; 郭丽; 周睿; 王鹏

中国激光, 2004, 31 (4): 385, 网络出版: 2006-06-12

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

论文大纲

徐德刚 ^*姚建铨陈进张百钢于意仲温午麒郭丽周睿王鹏

作者单位

天津大学精密仪器与光电子工程学院, 天津 300072

摘要

研究了平均功率达85 W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20 W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17.3 A时,实现了重复频率为20.4 kHz,脉冲宽度230 ns,输出功率为85 W的高功率、高重复频率绿光(532 nm)输出,不稳定性为±1.03%,光-光转换效率为9.7%。

Abstract

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.

参考文献

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徐德刚, 姚建铨, 陈进, 张百钢, 于意仲, 温午麒, 郭丽, 周睿, 王鹏. 85 W高稳定全固态绿光激光器的研究[J]. 中国激光, 2004, 31(4): 385. 徐德刚, 姚建铨, 陈进, 张百钢, 于意仲, 温午麒, 郭丽, 周睿, 王鹏. High-Stabilization 85 W All-Solid-State Green Laser Operation[J]. Chinese Journal of Lasers, 2004, 31(4): 385.

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