Coupling between curved dielectric waveguides.
Coupling characteristics between two curved dielectric waveguides that lie in a plane and have the same center of curvature are discussed. Analysis is carried out by using the coupled-mode equations. It is found that (i) the maximum power transfer efficiency between two curved waveguides having the same propagation constant changes from 0 to 1 as the radius of curvature increases and (ii) complete power transfer between two waveguides having different propagation constants can be realized by bending the two guides with suitable radii of curvature.
Murakami
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