Analysis of a cylindrical dielectric waveguide with three regions by use of an invariant mode-definition parameter

被引:7
作者
Lahart, MJ [1 ]
机构
[1] USA, Res Lab, Adelphi, MD 20783 USA
来源
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA A-OPTICS IMAGE SCIENCE AND VISION | 1998年 / 15卷 / 03期
关键词
D O I
10.1364/JOSAA.15.000727
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
Boundary conditions at a dielectric interface are expressed in terms of electrodynamic vector and scalar potentials that are expressed in terms of two-dimensional scalar solutions to the wave equation. Possible field configurations are expressed in terms of linear combinations of the scalar solutions. Their behavior at a dielectric interface and within a region of constant permittivity is investigated, and a parameter that is used to define propagation modes in cylindrical dielectric waveguides is shown to have the same value in regions with different permittivities. Scalar expressions that include this parameter are used to calculate exact expressions for fields and propagation constants in a cylindrical dielectric waveguide with three coaxial regions. The characteristics of propagation modes in these waveguides are discussed. (C) 1998 Optical Society of America.
引用
收藏
页码:727 / 735
页数:9
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