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Optica Publishing Group
  • Journal of Lightwave Technology
  • Vol. 23,
  • Issue 12,
  • pp. 4239-
  • (2005)

Finite-Difference-Based Mode-Matching Method for 3-D Waveguide Structures Under Semivectorial Approximation

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Abstract

A finite-difference-based mode-matching method (FD-MMM) is developed and demonstrated for three-dimensional (3-D) optical waveguide structures with arbitrary index profiles and multiple scattering interfaces along the waveguide axis. The computation domain is enclosed by a perfectly conducting box coated by a perfectly matched layer (PML). Semivectorial approximation is employed to simplify the formulations and calculations. Tradeoff and guidelines for choice of the PML parameters in the mode-matching analysis are discussed by comparison with known benchmark solutions for a two-dimensional (2-D) structure. The method is subsequently applied to and validated for 3-D structures in which both single and multiple scattering interfaces are simulated.

© 2005 IEEE

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