Abstract
Coupled mode theory in dielectric waveguides has been studied for parallel
waveguides and for non-parallel waveguides, among bent and straight optical
waveguides between two non-concentric bent waveguides or even between concentric
ring waveguides. The last case is treated in this work. Results are compared
to those obtained by using the finite element method (FEM). We studied the
influence of the curvature radius, the separation distance between the waveguides
and the refractive index of the inner waveguide in the energy transfer between
waveguides. In particular, the mechanism of energy transfer between concentric
waveguides was analyzed.
© 2013 IEEE
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