Abstract

The experimental study of an optical isolator by use of a nonreciprocal phase shift is demonstrated. The isolator has an optical interferometer composed of tapered couplers, nonreciprocal phase shifters, and a reciprocal phase shifter. The isolator, designed for a 1.55-µm wavelength, was fabricated to investigate the characteristics of each component. The branching and coupling characteristics of the tapered coupler were measured. The nonreciprocal and reciprocal phase shifts were also evaluated. By applying an external magnetic field to the interferometer, we confirmed the nonreciprocal phase shift in the interferometric isolator.

© 1999 Optical Society of America

Demonstration of an optical isolator with a semiconductor guiding layer that was obtained by use of a nonreciprocal phase shift

Hideki Yokoi, Tetsuya Mizumoto, Nobuhiro Shinjo, Naoki Futakuchi, and Yoshiaki Nakano
Appl. Opt. 39(33) 6158-6164 (2000)

Interferometric optical isolator employing a nonreciprocal phase shift operated in a unidirectional magnetic field

Hideki Yokoi, Yuya Shoji, Etsu Shin, and Tetsuya Mizumoto
Appl. Opt. 43(24) 4745-4752 (2004)

Elimination of a back-reflected TE mode in a TM-mode optical isolator with a Mach–Zehnder interferometer

Hideki Yokoi, Tetsuya Mizumoto, Shinpei Kuroda, Takafumi Ohtsuka, and Yoshiaki Nakano
Appl. Opt. 41(33) 7045-7051 (2002)

Wideband design of nonreciprocal phase shift magneto-optical isolators using phase adjustment in Mach-Zehnder interferometers

Yuya Shoji and Tetsuya Mizumoto
Appl. Opt. 45(27) 7144-7150 (2006)

Amorphous-Si waveguide on a garnet magneto-optical isolator with a TE mode nonreciprocal phase shift

Eiichi Ishida, Kengo Miura, Yuya Shoji, Hideki Yokoi, Tetsuya Mizumoto, Nobuhiko Nishiyama, and Shigehisa Arai
Opt. Express 25(1) 452-462 (2017)