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通过双波长振荡的理论计算,初步确定了黄激光的基频光1123 nm激光腔的镀膜参数。根据理论计算结果,对谐振腔进行了优化设计,采用选择性镀膜方式,对增益系数较大的1 064、946以及1 319 nm激光进行抑制使其在腔内不能增益起振,同时使得1 123 nm激光可以较容易地在腔内增益起振,采用50 W功率808 nm波长的半导体模块进行泵浦,获得了功率为6.3 W的1123 nm波长激光输出。通过对561 nm激光输出镜镀膜参数的设计,采用KTP晶体倍频,最终获得了3.5W功率的561 nm黄激光输出。
Based on the theoretical calculation of dual-wavelength oscillation, the coating parameters of the 1123 nm laser cavity at the fundamental frequency of the yellow laser are preliminarily determined. According to the theoretical calculation results, the optimal design of the resonator is carried out. The selective coating method is adopted to suppress the gain of 1 064, 946 and 1 319 nm laser with high gain coefficient, The nm laser can be easily gain-excited in the cavity and is pumped at 50 W with a wavelength of 808 nm in a semiconductor module to obtain a laser output of 112 W at a power of 6.3 W. Through the design of the coating parameters of 561 nm laser output mirror, KTP crystal frequency doubling is used to obtain the output of 561 nm yellow laser with 3.5 W power.