Equivalent circuit representation of open guided-wave structures

A modular equivalent circuit representation for modeling and analyzing open guided-wave structures, which takes into account both the guided and the continuous spectra, is discussed. In the development of the technique approximations that are valid for integrated optics in III-V compound semiconductors are utilized. The validity of these approximately was assessed on the basis of both physical arguments and numerical simulations. Results obtained with the present method are compared with the results of other methods of analysis for rectangular fiber and rib guides with sloped rib sides. The present method gives accurate results with limited computational effort and can analyze a wide variety of integrated optical components ranging from single waveguides of arbitrary cross-sectional profile to multiple coupled guides of arbitrary widths and spacings