利用光学软件ZEMAX优化设计并实际制作了一种可用于激光二极管阵列(LDA)快慢轴同时准直的新型准直器件,这种准直器利用三维精密调节系统对D型光纤的侧面进行刻蚀,在D型光纤的纵向上形成一个微型柱透镜阵列,其折射率与光纤折射率相同。利用这个微型柱透镜阵列对激光二极管阵列的慢轴进行准直,同时利用D型光纤横向上D型结构对激光二极管阵列的快轴进行准直。准直后的光束发散角为1.82 mrad×10.4 mrad,功率损失在10%以下。

A novel collimator for collimating the fast and slow axis of laser diodes array (LDA) simultaneously is designed optimized by ZEMAX and also fabricated by using a precise three-dimensional control actuator to erode the side of a D-type fiber. This collimator consists of a D-type fiber with a series of longitudinal cylindrical lens array which has the same refractivity as fiber and acts as the slow axis collimator for LDA. Meanwhile, the D-type fiber is also able to collimate the fast axis of LDA with its transverse D-type structure. Experimental results show that the angles of divergence of fast and slow axis are 1.82 mrad and 10.4 mrad respectively after collimation. The power loss is less than 10%.