Abstract
A numerical approach based on the finite-element method is described for the analysis of curved optical waveguides. Both TE-like and TM-like modes are systematically formulated. Numerical examples of the propagation characteristics of curved rib waveguides are given. Our results for curved rib waveguides with rectangular cross section agree well with the results of the method of lines. We also demonstrate the application of this approach by analyzing curved rib waveguides with trapezoidal cross section.
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