微光学元件阵列面阵LD光束整形及光纤耦合  

Beam shaping and fiber coupling for LD stacks with micro-optical elements array

作　　者：周崇喜[1] 杜春雷[1] 谢伟民[1] 杨欢[1] 

机构地区：[1]中国科学院光电技术研究所微细加工光学技术国家重点实验室,四川成都610209

出　　处：《红外与激光工程》2009年第3期452-455,共4页Infrared and Laser Engineering

基　　金：中国科学院知识创新工程重点项目

摘　　要：采用微透镜阵列组成的快、慢轴准直器件进行高功率面阵半导体激光器阵列光束准直,从而减小其光参数积,进一步采用棱镜阵列对准直光束进行整形,实现两方向光束质量的平衡,使激光束的综合光参数积小于光纤的光参数积,提高光束质量,获得高耦合效率的光纤耦合模块。对5个吧条组成(每个吧条40W、总输出功率为200W)的面阵半导体激光器光束进行准直、整形聚焦并耦合到芯径800μm、数值孔径0.22的多模光纤,获得125.4W的激光输出。Fast axial and slow axial collimator device consisting of micro-lens-array was used to collimate beams of high-power laser diode （LD） stacks. This contributed to decrease the beam＇s parameter products （BBPs） on the slow axis direction. Furthermore, a prism-array pair was used to shape the collimated beams to balance the BPPs of the high-power LD stacks on both the fast-axis and slow axis directions. The shaping could also make the comprehensive BPPs be less than that of the fiber, and the beam quality of high- power LD stacks was improved greatly to obtain the multi-mode fiber coupled stack with higher coupling efficiency. As an example, the beams of LD stacks consisting of 5 bars ,with the output power of 200 W were collimated, shaped, focused and coupled into the multi-mode fiber with the core diameter of 0.8 mm and the numeric aperture of 0.22.Finally,The output power of 125.4 W was obtained.

关 键 词：面阵LD 光纤耦合 微光学元件 光束准直 整形 

分 类 号：TN249[电子电信—物理电子学]