N×N星形平板介质光波导耦合器的理论与设计  

The Theoretical Study and Design of N×N Dielectric Slab Star Coupler

作　　者：邱亮[1] 丁竹[1] 杨祥林[1] 

机构地区：[1]南京邮电学院光纤通讯研究所,南京210003

出　　处：《微波学报》1997年第4期307-313,326,共8页Journal of Microwaves

基　　金：国家自然科学基金

摘　　要：本文研究N×N星形平板介质波导耦合器的分析模型与设计问题。运用菲涅耳衍射理论，给出传输效率的一般表达式。引入拉格朝日乘法算子，给出了实现最大传输所要求的端口最佳激励函数。并先后分析了均匀与非均匀端口耦合器的传输特性与结构参量的关系。求得了最佳传输时的结构参数。分别举例设计了两种耦合器的端口效率和传输特性。The analysis model and design of N×N dielectric slab star coupler are studied inthis paper. A general formula of transmission efficiency is derived from paraxial approximation ofFresnel's diffraction theory. The optimum aperture function is obtained by introducing a Lagrangemultiplier. The relations of transmission characteristic and structure parameter of uniform andnonuniform aperture coupler are analyzed respectively, and the optimum structure parameters areobtained. Finally, the aperture efficiency and transmmission characteristics of two kinds ofcouplers are designed for examples.

关 键 词：传输效率 光波导 耦合器 光纤通信 

分 类 号：TN814.6[电子电信—信息与通信工程] TN622.2