Effective-index method with built-in perturbation correction for integrated optical waveguides

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Original languageEnglish
Pages (from-to)223-228
Journal / PublicationJournal of Lightwave Technology
Issue number2
Publication statusPublished - Feb 1996


It is well known that the conventional effectiveindex method for the analysis of rectangular-core waveguides can in general produce accurate results only when the modes of the waveguides are operated in the far-from-cutoff region. In this paper, an improved effective-index method, called the effective-index method with built-in perturbation correction, is described. This method is as efficient as the conventional method yet produces much more accurate results. Numerical examples for single waveguides and directional couplers are presented to demonstrate the accuracy of the method with results obtained from an improved Fourier decomposition method as the references.