ANALYSIS OF VECTORIAL MODE FIELDS IN OPTICAL WAVE-GUIDES BY A NEW FINITE-DIFFERENCE METHOD

被引：140

作者：

LUSSE, P ^{[1
]}

STUWE, P ^{[1
]}

SCHULE, J ^{[1
]}

UNGER, HG ^{[1
]}

机构：

[1] TECH UNIV CAROLO WILHELMINA BRAUNSCHWEIG,RECH ZENTRUM,D-38023 BRAUNSCHWEIG,GERMANY

来源：

JOURNAL OF LIGHTWAVE TECHNOLOGY | 1994年 / 12卷 / 03期

关键词：

D O I：

10.1109/50.285331

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

An important class of dielectric optical waveguides has stepped refractive index profiles. For these waveguides we present a new finite-difference approach free of spurious modes. The coupled difference equations are formulated in terms of the transverse magnetic field components H(x) and H(y). We show how the boundary conditions can be formulated and included in the finite difference scheme to obtain a unique set of equations. For a step-index fiber a comparison of the numerical results with the analytical solution shows that the relative error in the propagation constant is as low as 4.4 x 10(-7) for an index difference of 7.3%. For a rib waveguide, we compare our results with previously published data based on other methods. Field plots of the dominant and the weak transverse field components of the magnetic field for the fundamental mode of a buried rib waveguide are also given.

引用

页码：487 / 494

页数：8