激光与光电子学进展, 2018, 55 (5): 051401, 网络出版: 2018-09-11
基于 LiB3O5晶体腔内倍频的126 W高稳定性532 nm声光调Q 激光器 下载: 794次
126 W High-Stability Acousto-Optical Q -Switched 532 nm Laser Based on LiB3O5 Crystal Intracavity Frequency-Doubling
激光器 声光调Q 腔内倍频 二次谐波产生器 lasers acousto-optical Q-switched intracavity frequency-doubling second harmonic generator
摘要
基于Ⅱ类相位匹配LiB3O5(LBO)晶体腔内倍频技术,获得了一种高稳定性532 nm Nd∶YAG声光调Q 激光器。当声光调Q 激光器的重复频率为12 kHz时,可实现平均功率为126 W的绿光激光输出。通过测量可得,其脉冲宽度为52 ns,脉冲能量为10.5 mJ,峰值功率为205.9 kW,且808 nm的激光二极管光功率到532 nm绿光的转换效率为9.19%。LBO晶体由控温炉精确控温,温度控制在±0.1 ℃以内,有利于高效率、高稳定二次谐波的产生。由实验结果可得,绿色激光器的输出功率稳定性较好, 126 W的532 nm绿光激光器连续工作3 h的均方根不稳定性为±0.628%。
Abstract
A highly stable acousto-optical Q-switched 532 nm Nd∶YAG laser based on a type Ⅱ LiB3O5(LBO) crystal intracavity frequency-doubling is demonstrated. Average output power of 126 W of green laser is obtained at a repetition rate of 12 kHz for acousto-optical Q-switched laser. Test results show that the pulse width is 52 ns, which corresponds to a pulse energy of 10.5 mJ and a peak power of 205.9 kW. The diode-to-green optical conversion efficiency from 808 nm to 532 nm is 9.19%. The LBO crystal's temperature is precisely controlled by a temperature control furnace with the precision of ±0.1 ℃, which directly contributes to the high efficiency high-stability second harmonic generation. The output power of the green laser is very stable. The root mean square instability of green laser at 126 W is calculated to be ±0.628% in 3 h of continuous work.
周旭阳, 王劲松, 梁旭, 萧云峰, 黄国林. 基于 LiB3O5晶体腔内倍频的126 W高稳定性532 nm声光调