Coupling losses and mode properties in planar waveguide resonators

In this paper the coupling losses in planar waveguide resonators are calculated and the coupling losses for the EH 11 mode of various planar waveguides are presented as a function of mirror curvature and position. It is shown that there exist two special geometries to provide low coupling losses which is different from the square waveguide. The design and the mode properties of a planar waveguide resonator are discussed.