Abstract
A generalized coupled-mode theory1 is developed to study the coupling system of two curved weakly guiding single-mode fibers. Our theory takes into account the local fields, nonorthogonality, and phase interference between guide modes in the curved optical waveguides. In similar special cases, the coupling mode formulations and coupling coefficients1 agree with those obtained from the Hardy-Streifer coupled-mode theory.2
© 1988 Optical Society of America
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