Variational analysis of diffused planar and channel waveguides and directional couplers

Abstract

A simple and accurate analytical variational method is presented for studying the propagation characteristics of diffused planar and channel waveguides. The method gives accurate values of a normalized propagation constant for these waveguides. The method is also applied to the study of the dependence of coupling length on interwaveguide separation in diffused channel-waveguide directional couplers, and comparisons with other available theoretical results and experimental data are presented.

© 1994 Optical Society of America

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