为了获得具有更高输出功率和良好光斑分布均匀性的半导体激光光源, 根据半导体激光优良的偏振特性, 利用偏振分光棱镜将2束大功率激光束合成为一束更大功率的光束, 通过一个发射系统投射。在光束合成前采用非球面光学系统对每个激光器慢轴方向的光束进行扩束, 使其与快轴方向光束发散角基本一致。实验证明, 此种半导体激光复合光源具有良好的光斑均匀性, 其输出功率是2个半导体激光器输出功率之和, 完全满足激光制导等军用系统对激光功率和光斑均匀性的要求。

In order to obtain a semiconductor laser source with higher output power and good spot uniformity, two semiconductor laser beams are combined into one laser beam of higher power by using a polarizing beam splitter and transmitting through one optical channel according to the polarization characteristic of the semiconductor laser. The divergence angle of beam along the slow axis direction of each laser is expanded before combined by an aspheric lens so as to be consistent with the divergence angle along the fast axis direction. The experiment results show that this combined semiconductor laser source has good spot uniformity and its output power is the sum of two laser output powers, which meets the laser power and spot uniformity requirements for laser guidance in military applications.