Improved Full-Vectorial Finite-Difference Mode Solver for Optical Waveguides With Step-Index Profiles
Resource
Journal of Lightwave Technology 20 (8): 1609-1618
Journal
Journal of Lightwave Technology
Journal Volume
20
Journal Issue
8
Pages
1609-1618
Date Issued
2002
Date
2002
Author(s)
Abstract
A general relation considering an interface condition between a sampled point and its nearby poins in the finite-difference analysis of optical waveguides is derived. Our formulation is a full-vectorial one, and the interface can be oblique to the global coordinate axes or even can be with curvature. Using the derived formulation, optical waveguide structures with arbitrary step-index profiles can be dealt with. The validity of the proposed method is examined by comparing the numerical calculation with the analytical solution of a step-index optical fiber. The method is also applied to the analysis of fused fiber-optic couplers and compared with prior analysis using the surface integral equation method.
Type
journal article
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