透镜导管的优化设计  

Optimization of lens duct

作　　者：郜洪云[1] 傅汝廉[1] 秦华[1] 史新刚[1] 

机构地区：[1]南开大学现代光学研究所教育部光电信息技术科学重点实验室,天津300071

出　　处：《光电子．激光》2006年第4期396-400,共5页Journal of Optoelectronics·Laser

基　　金：国家重大基础研究专项基金资助项目(2002CCA01700);国家自然科学基金资助项目(60378007)

摘　　要：针对透镜导管出射光线发散角较大的问题,对其结构进行了优化设计。用光线追迹的方法给出了透镜导管的传输规律,通过计算机模拟得到其最佳参数。结果表明,优化后的透镜导管较好地均衡了面阵激光二极管阵列(LDA)出射的快慢轴2个方向上不匹配的拉格朗日不变量,改善了其空间分布不连续的状况,近场输出为近高斯型的场分布,从透镜导管端面出射的激光束发散角为37°,传输效率高达90%。实验结果和理论分析吻合。Aiming at the question that radiation angle of emergent rays is quite large ,we optimized the structure of lens duct. The transmission characteristic of lens duct was described by using a ray-tracing method,and the best parameters were gained by computer simulation. The results show that a nearly Gaussian distribution can be obtained in nearfield, and the lens duct, which has the transmission efficiency of 90 %, not only balances the Lagrange invariant from planar laser diode array （LDA） in two axis direction,but also improves the state of incontinuous light beams in space. Furthermore, the radiation angle of emergent beam from the lens duct is 37℃. The experimental results accord with the analysis in theory.

关 键 词：激光二极管阵列(LDA) 透镜导管 空心导管 光线追迹 

分 类 号：TN245[电子电信—物理电子学]