北京邮电大学学报

  • EI核心期刊

北京邮电大学学报 ›› 2002, Vol. 25 ›› Issue (1): 64-67.

• 学术论文 • 上一篇    下一篇

有限元法分析非对称光纤耦合器波导

吴磊,郑远,齐江,濮宏图,陈树强   

  1. 北京邮电大学电信工程学院, 北京 100876
  • 收稿日期:2001-03-28 出版日期:2002-01-10
  • 作者简介: 吴磊(1972—),男,博士生
  • 基金资助:
     

Finite Element Analysis of Optical Waveguides #br# in Asymmetry Fiber Couplers

WU Lei, ZHENG Yuan, QI Jiang, PU Hong-tu, CHEN Shu-qiang   

  1. Telecommunication Engineering School, Beijing University of Posts andTelecommunications, Beijing 100876, China
  • Received:2001-03-28 Online:2002-01-10
  • Supported by:
     

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,偶模传播常数对两光纤熔融程度不敏感。

关键词: 光纤通信, 有限元法, 非对称耦合器, 传播常数

Abstract: The electromagnetic field characteristics of opticalwaveguides 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.

Key words: optical fiber communications, finite element method, asymmetry fiber couplers, propagation constant

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