大口径端泵片状放大器的泵浦耦合系统（英文）  

Couplingsystem for laser-diode-array end-pumped slab amplifiers

作　　者：王振国[1] 蒋新颖[1] 郑建刚[1,2] 严雄伟[1] 李明中[1] 李敏[1] 

机构地区：[1]中国工程物理研究院激光聚变研究中心,四川绵阳621900 [2]IFSA协同创新中心,四川绵阳621900

出　　处：《强激光与粒子束》2017年第9期6-11,共6页High Power Laser and Particle Beams

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。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 I.D 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 require ments of end-pumped slab amplifiers for high pump power and pump power density.

关 键 词：固体激光器 泵浦耦合 激光二极管阵列 空心导管 

分 类 号：TN242[电子电信—物理电子学]