Optical three-port circulators made with ring resonators.

摘要: We propose a circulator consisting of ring resonator coupled to three waveguides with Bragg reflectors at one end each waveguide. A magneto-optically active material placed inside the causes two counter-propagating modes split in resonance frequency, which can be exploited for perfect circulation by properly adjusting coupling between and ring. Such device features transmission spectrum that is similar three-port photonic crystal circulators but much simpler build as it only contains elements have already been experimentally realized.