A nonuniform FDTD technique for efficient analysis of propagation characteristics of optical-fiber waveguides

Author

Shen, Guoqiang ; Chen, Yinchao ; Mittra, Raj

Author_Institution

Dept. of Electron. & Inf. Eng., Hong Kong Polytech. Univ., Hong Kong

Volume

47

Issue

3

fYear

1999

fDate

3/1/1999 12:00:00 AM

Firstpage

345

Lastpage

349

Abstract

In this paper, we present a highly efficient one-dimensional cylindrical nonuniform finite-difference time-domain (1-D CNUFDTD) method, which utilizes the unsplit anisotropic perfectly matched layer (APML) for mesh truncation along the radial direction to analyze axisymmetric optical-fiber waveguides. As a first step, we validate the proposed FDTD algorithm by analyzing a uniform dielectric waveguide of circular cross section and show that the results are in excellent agreement with the conventional mode theory solutions. Next, we apply the algorithm to analyze propagation characteristics of a number of commonly used optical-fiber waveguides, i.e., step-index multimode, graded-index multimode, and single-mode step-index configurations

Keywords

finite difference time-domain analysis; gradient index optics; optical fibre theory; 1D cylindrical FDTD algorithm; axisymmetric fiber waveguides; graded-index multimode configuration; mesh truncation; nonuniform FDTD technique; optical fiber waveguides; perfectly matched layer; propagation characteristics; single-mode step-index configuration; step-index multimode configuration; unsplit anisotropic PML; Algorithm design and analysis; Anisotropic magnetoresistance; Dielectrics; Finite difference methods; Geometrical optics; Optical propagation; Optical waveguide theory; Optical waveguides; Perfectly matched layers; Time domain analysis;

fLanguage

English

Journal_Title

Microwave Theory and Techniques, IEEE Transactions on

Publisher

ieee

ISSN

0018-9480

Type

jour

DOI

10.1109/22.750237

Filename

750237