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Magneto-optical (MO) switches operate with a dynamically applied magnetic field. The MO devices presented in this paper consist of microring resonators (MRRs) fabricated on amorphous silicon-ongarnet platform. Two types of MO switches with MRRs were developed. In the first type, the switching state is controlled by an external magnetic field component included in the device. By combination of MO and thermooptic effects, wavelength tunable operation is possible without any additional heater, anddoi:10.1587/transele.2019ocp0003 fatcat:2ydkfroy4baynotlkpujlsxfye