Improvement of finite difference methods for step-index optical waveguides
作者:
C.Vassallo,
期刊:
IEE Proceedings J (Optoelectronics)
(IET Available online 1992)
卷期:
Volume 139,
issue 2
页码: 137-142
年代: 1992
DOI:10.1049/ip-j.1992.0024
出版商: IEE
数据来源: IET
摘要:
New 3-point finite difference formulae with equally spaced grid points are given for the analysis of scalar or semivectorial fields in waveguides with discontinuous refractive index profiles. The new formulae lead to more accurate calculations for the modes than the previously known methods, irrespective of the location of the discontinuities with respect to the grid points and without averaging the permittivity over meshes.
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