Abstract

A small optical isolator with high-isolation loss usable over a wide wavelength and temperature range is anticipated for a high bit rate of 2-10 Gbit/s for coherent optical communication systems. The isolation loss and its wavelength and temperature dependence are improved by a cascaded optical isolator consisting of two conventional ones as theoretically predicted by Shiraishi and Kawakami.¹ Design considerations for the setting of polarizers and the configuration of magnets and the experimental results on the newly developed isolator are discussed.

© 1988 Optical Society of America