Dielectric Dual Ring Resonator for Millimeter Through Optical Wave Integrated Circuit

Frequency responses of an open type resonator constructed by coupled two dielectric rings which have different diameters (the diameters are relatively large compare to handling wavelength) are investigated theoretically and experimentally. It is found that the resonance frequency spacing of the resonator system is given by the Least Common Multiple (L.C.M.) of the resonance frequency spacing of each dielectric ring resonator. The quality factor (Q value) of this resonator system remains higher value. This dual ring resonator will be widely used for frequency discriminators in the millimeter through optical wave integrated circuits.