为实现空间激光束的远距离传输,利用矢量折射定理研究了大功率半导体激光器发散光束经非球面、非轴对称准直系统的光传输特性。对空间光线传输得出了矩阵传递公式,并针对大功率线源半导体激光器的发散光束进行了高精度的准直优化设计。为实现对激光束的进一步准直,利用光学设计软件CODE-V设计了卡塞格伦光学天线。利用两点法对发散角进行了实验测试,结果表明优化设计的准直系统发散角为1.924 mrad,经光学天线进一步准直后的发散角为96.2 μrad。本空间光线追迹方法对复杂光学系统的精确计算具有一定参考意义,所设计的大功率线源激光束准直系统能广泛应用于远距离激光通信系统中。

Based on the law of refraction in vector form, the laser beam propagation in an aspheric and asymmetrical laser beam collimation system from high-power semiconductor laser has been researched for spatial laser beam long-distance propagation. The matrixes transfer formulas for spatial rays have been obtained. For the high-power semiconductor laser with line emitting source, the divergent angle of the converted laser beam has been diminished by the optimization design of high precision collimation system. Cassegrain optical antenna has been designed by optical design software CODE-V to collimate the laser beam further. Based on the two-point algorithm, the divergent angle for the collimation system has been measured. The measured results indicate that the divergent angle of the optimization collimation system is less than 1.924 mrad, and the divergent angle collimated by the optical antenna is less than 96.2 μrad. The spatial rays method possesses reference meaning for accurate counting of complex optical systems. The collimation system designed for high-power semiconductor laser with line emitting source can be widely used in long-distance spatial laser communication.