Magneto-Optic Devices using Interaction between Magnetostatic Surface Wave and Optical Guided Wave

Abstract

An analysis of the optical TE-TM mode conversion by magnetooptic effect induced by magnetostatic surface wave (MSSW) is discussed. A typical MSSW waveguide has a thick layer for the convenient excitation of MSSW. However, the waveguide is not a single mode waveguide but multi-mode for the optical wavelength of 1.3 [µm]. We propose here the multi-layer waveguide consisting of the thin and thick magnetic layers that improves the characteristics of optical mode conversion. The efficiency of 100% is achieved over the interaction length of about 1.0 [cm] for the applied microwave power density of a few [mW/mm].