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通过双波长理论计算确定了双波长运转时腔镜介质膜在不同波长的最佳透射率以及激光腔内不同波长的衍射损耗,最终利用四腔镜双谐振腔结构实现了激光二极管(LD)侧面抽运Nd∶YAG激光器在1064 nm和1319 nm的双波长同时连续运转,并分析了激光腔长与双波长激光输出功率比值之间的关系以及抑制1338 nm等其他波长运转的方法。在抽运功率为500 W时,实现了平均功率超过45 W的连续激光输出,1064 nm和1319 nm单一波长连续输出功率均超过20 W。两波长输出的光束质量因子M2分别为32和39。输出功率不稳定性均小于5%。
Based on the dual-wavelength theory, the best transmissivity of the dielectric mirror film at different wavelengths and the diffraction loss of different wavelengths in the laser cavity are determined. The laser diode (LD) The pumped Nd:YAG laser operates at the same time with dual wavelengths at 1064 nm and 1319 nm. The relationship between the laser cavity length and the dual-wavelength laser output power ratio and the method of suppressing other wavelengths such as 1338 nm are analyzed. At pump power of 500 W, a continuous laser output with an average power of more than 45 W was achieved, with continuous output power exceeding 20 W at 1064 nm and 1319 nm for a single wavelength. The two-wavelength output beam quality factor M2 is 32 and 39, respectively. Output power instability are less than 5%.