从半导体激光器的光参数积出发,给出了一种集光束准直、整形、聚焦及耦合的高功率半导体激光器阵列光束的光纤耦合方法。推导出了正交的两组准直微透镜阵列的面形公式;计算了准直光束的准直精度和聚焦光学系统参数。作为例子,给出一个光纤芯径为800 μm,数值孔径0.37的光纤耦合高功率半导体激光器实验结果,其耦合效率大于53%。

A method to couple high power laser diode array (LDA) beams into a single multi-mode fiber which includs collimating, shaping, focusing and coupling is present based on the beam parameter product (BPP) of laser beam. The orthogonal surface equation of the collimating micro-lenses array is derived, the divergence angles after collimating and the parameters of the focused lens are calculated. As a example, a high power fiber coupled LDA module with the core diameter of 800 μm and numerical aperture of 0.37 is gotten and the coupling efficiency is more than 53%.