任意截面介质波导导模的叠代矩量法分析

IMM Analysis of guided modes of dielectric waveguides with arbitrary cross-section

本文提出用以计算任意截面介质波导色散关系的叠代矩量法,并给出用叠代矩量法计算椭圆介质波导、三角形波导、平切圆波导、蛋形截面波导等的传播特性的实例.计算结果与有限元法、点匹配法等精确数值计算结果符合很好.本方法简便易行,计算工作量较小.

In this paper we present an iterated moment method (IMM) for evaluating dispersion relations of dielectric waveguides with arbitrary cross-section. The numerical results are given for the fibers of var ous shapes such as circles, ellipses, equi-lateral triangles, chipped-circles and egg-shaped cross-sections. The results agree well with exact computer-aided numerical results by finite element method and point-matching method. The present method is simple and saves computation time.