优化的波导短程透镜研究  

Research on Optimal Geodesic Waveguide Lenses

作　　者：石邦任[1] 孔梅[1] 宋哲[1] 刘支华[1] 武继江[1] 

机构地区：[1]长春理工大学理学院,长春130022

出　　处：《光学学报》2003年第11期1320-1324,共5页Acta Optica Sinica

摘　　要：对光波导短程透镜进行优化。在无曲率奇点理想波导短程透镜的基础上 ,选取一般形式卷边函数 ,以无弯曲损耗为目标 ,讨论了透镜过渡区不同卷边函数形式的曲率分布 ,选取了最优卷边函数并给出透镜母线的特解。经过数值计算得到了优化的理想波导短程透镜的母线函数数值 ,完成了非球面面型的精细加工 ,研制出优化的理想波导短程透镜。实验测试结果表明 ,短程透镜在通光孔径 8mm内消球差 ,对 4mm宽的平面波束 ,焦距 2 0mm的短程透镜 ,其焦点束斑宽度小于 4 μm。The purpose is to optimize geodesic waveguide lenses. A general expression is chosen for the round edge of geodesic lens based on the design of perfect geodesic waveguide lenses free of singularity of curvature. The curvature in the round area is discussed for different round area functions to depress loss due to bend. An optimal round area function and a particular solution for the lens are given. Through numerical computation, the generating curve is achieved. The machining of the aspheric surface is finished, and an optimized perfect geodesic waveguide lens is developed. Measurements show that the lens has no spherical aberration across the total effective aperture of 8 mm, and for a 4 mm-width beam and a lens with 20 mm focal length, the width of the focus is about 4 μm.

关 键 词：波导光学 短程透镜 透镜母线 非球面透镜 弯曲损耗 光子技术 曲率奇点 传输损耗 卷边函数 

分 类 号：TN252[电子电信—物理电子学]