Abstract

To the best of our knowledge this is the first time a new optical isolator has been developed that uses BiCaInVIG, a non-rare-earth iron garnet. The device has high isolation > 40 dB with an insertion loss of 1.0 dB at 1.3-μm wavelength and > 43 dB with 1.1 dB at 1.52-μm wavelength, including Fresnel reflection losses of ~ 0.8 dB for two polarizers. In addition, the device is inexpensive. In order to adjust maximum isolation when the isolator is assembled, a theoretical basis is presented, and the calculated values are in good agreement with the experimental results.

© 1992 Optical Society of America

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