大口径端泵片状放大器的泵浦耦合系统（英文）

发布时间：2018-04-22 16:01

本文选题：固体激光器 + 泵浦耦合　；参考：《强激光与粒子束》2017年09期

【摘要】：为了满足片状激光放大器对泵浦功率密度的要求,设计并加工了高缩束比的耦合系统。根据LD的发光特性,将输出功率为80kW的LD阵列进行拟球面排列,采用正交柱面透镜配合空心导光管进行泵浦耦合,将发光面积为330 mm×85mm的泵浦光,在输出口处压缩至18mm×18mm的口径,耦合系统的缩束比高达86∶1。模拟计算表明,该耦合系统的耦合效率对导光管反射板的反射率依赖性较低。实验测量该耦合系统的效率为84.2%,输出口处泵浦光场快慢轴的调制度分别为1.30和1.18,且脱离耦合系统后的泵浦光传输8.5mm后,依然可以保持泵浦光场的轮廓。该耦合系统在效率、泵浦场均匀性、传输性等方面均满足端面泵浦的片状放大器对泵浦耦合系统的要求。
[Abstract]:In order to meet the requirement of the pump power density of the lamellar laser amplifier, a coupling system with high contraction beam ratio was designed and fabricated. According to the luminescence characteristics of LD, the LD array with output power of 80kW is arranged in pseudo sphere, and the orthogonal cylindrical lens is used to pump coupled with the hollow light guide tube. The pump light with a luminous area of 330mm 脳 85mm is compressed to the aperture of 18mm 脳 18mm at the output point. The beam reduction ratio of the coupled system is as high as 86: 1. The simulation results show that the coupling efficiency of the coupling system is less dependent on the reflectivity of the light guide tube reflector. The experimental results show that the efficiency of the coupled system is 84.2 and the modulation system of the fast and slow axis of the pump light field at the output outlet is 1.30 and 1.18 respectively. The profile of the pump field can still be maintained after the pump light propagates 8.5mm without the coupling system. The coupling system meets the requirements of the end-pumped lamellar amplifier in terms of efficiency, uniformity of the pump field, transmission and so on.
【作者单位】：中国工程物理研究院激光聚变研究中心;IFSA协同创新中心;
【分类号】：TN24;TN722

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