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提出了定量表征激光棒内吸收抽运光分布均匀性特征参量——吸收抽运光分布均方根偏差相对值,利用该参量以及自行编制的光线追迹程序,定量分析了五向侧面抽运Nd∶YAG模块内吸收抽运光分布均匀性及耦合吸收效率随激光二极管(LD)Bar条与Nd∶YAG棒表面间距的变化规律,确定了侧面抽运模块优化结构参数;在此基础上研制了抽运频率为100 Hz,占空比为2%的侧面抽运Nd∶YAG模块,其808 nm最大平均抽运功率为200 W,1064 nm短腔最大输出功率为95 W,光光转换效率为47.5%。
A quantitative characterization of the relative uniformity of the root mean square deviation of the absorbed pump light distribution in the laser rod is presented. By using this parameter and the self-programmed ray tracing program, the five-sided pumping The uniformity of the pump light distribution and the coupling absorption efficiency in the Nd:YAG module were determined with the variation of the Bar spacing of the laser diode (LD) and the surface of the Nd:YAG rod. The optimized structural parameters of the side-pumped module were determined. Based on this, The side-pumped Nd:YAG module with a pumping frequency of 100 Hz and a duty cycle of 2% has a maximum average pumping power at 808 nm of 200 W and a maximum output power of 95 W at 1064 nm. The light-to-light conversion efficiency 47.5%.