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报道了一台激光二极管(LD)侧面抽运的高功率连续1338 nm Nd∶YAG激光器.通过分析Nd∶YAG的跃迁谱线和相应的受激发射截面的特点,根据多跃迁谱线激光材料波长选择的耦合率条件,合理设计激光棒和腔镜的耦合率参数.激光谱线测量表明,成功抑制了1064 nm和1319 nm波长激光的振荡.以高功率808 nm激光二极管侧面抽运模块为抽运源,采用平-平腔结构,研究了耦合输出率分别为5.3%,7.4%和11%的输出镜的输出情况,比较分析了不同腔长对激光输出的影响.在抽运功率为555 W时,采用5.3%的耦合输出镜和20 cm腔长,获得大于100 W的1338 nm单一波长激光输出,光-光转换效率大于18%,斜率效率为35%,输出光束的M2因子为36.
A high power continuous 1338 nm Nd:YAG laser with side-pumping of laser diode (LD) was reported.According to the characteristics of the transition spectrum of Nd:YAG and the corresponding stimulated emission cross section, The coupling ratio of the laser bar and the cavity mirror was designed reasonably.The laser line measurement showed that the laser oscillation at 1064 nm and 1319 nm was successfully suppressed.The high power 808 nm laser diode side pumping module was used as pumping The output of the output mirror with the coupled output rates of 5.3%, 7.4% and 11% is studied by using the flat-flat cavity structure and the influence of different cavity length on the laser output is analyzed.When the pumping power is 555 W, a 1338 nm single-wavelength laser output greater than 100 W is achieved using a 5.3% outcoupler and 20 cm cavity length with a light-to-light conversion efficiency of greater than 18%, a slope efficiency of 35%, and an M2 output factor of 36 .