高功率窄线宽可调谐 1 064 nm 环形腔激光

文章采用了三镜环形腔内插入标准具获取高功率窄线宽可调谐1064 nm 激光。对环形腔的单向运行、标准具压窄线宽与调谐波长及激光大基模体积运转进行了理论分析与计算，结合实验优化了腔镜曲率与输出耦合率。在808 nm 半导体激光泵浦功率151 W 条件下，获得输出功率33.7 W、光束质量因子 M 2＝1.28、线宽0.1 GHz 的单向1064 nm 激光输出，相应的光转换效率22.3%。采用高精度控温仪对标准具进行精确温控，实现激光波长的精密调谐。改变标准具温度获得1064 nm 波长调谐范围72.6 GHz，调谐精度为220 MHz。波长调谐过程中1064 nm 激光输出功率变化约10%。整个系统稳定可靠，而且相对简单，较易实现，为获得可调谐窄线宽1064 nm 激光提供了实用有效的技术手段。

High-Power Ring Cavity Laser with Tunable Narrow Linewidth of 1 064 nm

A high power narrow linewidth tunable 1 064 nm laser is obtained using three mirror ring cavity with an etalon. Theoretical analysis of unidirectional operation of the ring resonator, narrowing linewidth and tuning wavelength with an etalon and large volume mode operation of the laser was carried out. The mirror curvature and output coupling ratio were optimized in the experiment. Under the 808 nm laser diode pump power of 151 W, 33.7 W of unidirectional 1 064 nm laser output was obtained with beam quality factor of 1.28 and linewidth of 0.1 GHz, and the corresponding optical conversion efficiency was 22.3%. Precise tuning of laser wavelength was realized by controlling precisely temperature of the etalon. Tunable range of 72.6 GHz was achieved by varying the temperature of the etalon, and the tuning accuracy was 220 MHz. The output power of the 1 064 nm laser was changed by about 10% in wavelength tuning process. The whole system is stable and reliable, relatively simple and easy to realize. It provides a practical and effective technical mean for obtaining tunable narrow linewidth 1 064 nm laser.