WHISPERING GALLERY MODES ALONG A BENT CHANNEL WAVE-GUIDE

Whispering gallery modes (WGMs) that propagate along a bent dielectric waveguide with two-dimensional field confinement are analyzed with a self consistent field approximation (weighted index theory). WGMs are quasi-modes (leaky modes) with their field shape distorted toward the outermost boundary of a bend. Numerical results are shown for the modes in an optical embedded channel waveguide whose center of curvature is on an arbitrary location. Calculation of the leakage loss is included as well.