报道了一种传导冷却、双侧面反弹抽运的脉冲运转Nd:YAG两级板条激光放大器。在重复频率条件下,通过实验测试其放大输入输出关系曲线、光束质量、热效应等特性,证明此种类型的放大器具有效率高、光束质量好、结构紧凑、热效应低和功率可定标放大等特性。实验对由单频激光振荡器输出的平均功率1.1 W,脉宽11.3 ns,光束质量因子(M2x ,M2y)为1.2的激光脉冲序列进行放大,当重复频率为125 Hz时,得到平均功率24.1 W,脉宽8.9 ns,光束质量因子M2x=1.53,M2y=1.27的高光束质量放大激光脉冲序列输出。实验结果表明,此种类型的激光放大器在空间探测应用上具有潜力。

One kind of conductively-cooled,double-edge-bounce-pumped and pulsed Nd:YAG double-stage slab laser amplifier is reported.When the amplifier operates in pulsed condition,its high efficiency,good beam quality,compactness,weak thermal effects and high scalable gain are proved by the tests of the input-output relationship,beam quality and thermal effects and so on.The pulsed laser generated by a seed injected single-frequency oscillator,whose power is 1.1 W,pulse duration is 11.3 ns and beam quality factor (M2x,M2y) is 1.2,is amplified by the amplifier at the repetition frequency of 125 Hz and high-beam-quality output laser,whose power is 24.1 W,pulse duration is 8.9 ns and beam quality factor M2x is 1.53,M2y is 1.27,is obtained.Experimental results show that this kind of laser amplifier has great potential in the application of space detection.