介绍一种纯风冷激光二极管泵浦的脉冲Nd:YAG激光器,单脉冲能量250 mJ,重复频率25 Hz,脉冲宽度7 ns,光光转换效率13.6％.激光器输出为准基模,垂直和水平方向的M2值测量结果分别为2.81和4.09.同样结构下将风冷系统换成风冷水冷结合方式,激光器脉冲能量345 mJ,重复频率提高到50 Hz,光光转换效率上升为15.2％.两种形式的激光器连续工作时间5 min,并进行了高温+55℃和低温-25℃的环境试验.%A kind of pure-air cooled laser diode pumped pulse Nd:YAG laser is introduced, with single pulse energy 250 mJ, repeat frequency 25 Hz, pulse width 7 ns, light conversion efficiency of 13. 6%. Laser output as basal lamina, the vertical and horizontal directions of the M2 measurement results are 2. 81 and 4. 09. Under the same laser structure with air cooling and water combination, increase the laser pulse energy to 345 mJ, repetition frequency to 50 Hz, light conversion efficiency to 15. 5%. Make the two kinds of laser continuously work for 5 minutes, the environmental test is carried out with high temperature of +55 degrees and low temperature -25 degrees.
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