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大口径端泵片状放大器的泵浦耦合系统

Coupling system for laser-diode-array end-pumped slab amplifiers

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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80 kW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×85 mm的泵浦光, 在输出口处压缩至18 mm×18 mm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8.5 mm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

A coupling system with a high contraction coefficient, up to 86∶1, has been designed and manufactured. The output from the spherically arranged 80 kW LD arrays is delivered by orthogonal cylindrical lenses and a hollow duct. Experimentally measured coupling efficiency of the system is 84.2%. Intensity modulation values of the pump-field at the exit are 1.30 of LD fast axis and 1.18 of LD slow axis. The pump light can transport a distance of 8.5 mm at least with its shape preserved. The coupling system can meet the requirements of end-pumped slab amplifiers for high pump power and pump power density.

Newport宣传-MKS新实验室计划
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中图分类号:TN242

DOI:10.11884/hplpb201729.170053

所属栏目:高功率激光与光学

收稿日期:2017-02-21

修改稿日期:2017-05-11

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王振国:中国工程物理研究院 激光聚变研究中心, 四川 绵阳 621900
蒋新颖:中国工程物理研究院 激光聚变研究中心, 四川 绵阳 621900
郑建刚:中国工程物理研究院 激光聚变研究中心, 四川 绵阳 621900IFSA协同创新中心, 四川 绵阳 621900
严雄伟:中国工程物理研究院 激光聚变研究中心, 四川 绵阳 621900
李明中:中国工程物理研究院 激光聚变研究中心, 四川 绵阳 621900
李 敏:中国工程物理研究院 激光聚变研究中心, 四川 绵阳 621900

联系人作者:王振国(wangzhenguo_82@163.com)

备注:Wang Zhenguo (1982-), male, PhD, engaged in diode pumped solid state laser research.

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引用该论文

Wang Zhenguo,Jiang Xinying,Zheng Jian’gang,Yan Xiongwei,Li Mingzhong,Li Min. Coupling system for laser-diode-array end-pumped slab amplifiers[J]. High Power Laser and Particle Beams, 2017, 29(9): 091002

王振国,蒋新颖,郑建刚,严雄伟,李明中,李 敏. 大口径端泵片状放大器的泵浦耦合系统[J]. 强激光与粒子束, 2017, 29(9): 091002

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