有限元法分析非对称光纤耦合器波导  

Finite Element Analysis of Optical Waveguides in Asymmetry Fiber Couplers

作　　者：吴磊[1] 郑远[1] 齐江[1] 濮宏图[1] 陈树强[1] 

机构地区：[1]北京邮电大学电信工程学院,北京100876

出　　处：《北京邮电大学学报》2002年第1期64-67,78,共5页Journal of Beijing University of Posts and Telecommunications

摘　　要：用有限元法分析了非对称光纤耦合器波导的场特性 .利用自适应法划分有限元三角形格子 ,计算出在不同结构下最低阶的 4个模式的传播常数 .数值结果表明 ,组成耦合器的光纤半径比对偶模和奇模的传播常数都有明显的影响 .与奇模不同的是 。The electromagnetic field characteristics of optical waveguides in asymmetry fiber couplers are investigated by a finite element method. An adaptive size triangular mesh is employed to obtain the propagation constants of the first four modes in different constructions. Numerical result shows that the propagation constants of even and odd modes are obviously affected by the radius ratio of the two fibers composing the coupler. In comparison with odd mode, the propagation constant of even mode is insensitive to fusion degree of fibers.

关 键 词：光纤通信 有限元法 非对称光纤耦合器 传播常数 波导 

分 类 号：TN622[电子电信—电路与系统] TN252