DEVELOPMENT OF A WIDEBAND OPTICAL ISOLATOR AND ITS APPLICATION TO A VIDEO SIGNAL TRANSMISSION

Abstract

A wideband opitical isolator for 1.5μm wavelength has been developed using Bi-substituted terbium iron garnet(TbBiIG) single crystal as a Faraday rotator. The optical isolator features 0.2μm bandwidth, 0.5dB insertion loss and 34dB backward loss at a wavelength of 1.5μm. Through an optical fiber transmission system with the isolator, we could transmit a stable and clear picture for the lights of 1.5 to 1.7μm wavelength.