Abstract

A method to miniaturize the Faraday rotator for an optical isolator is proposed. The rotator includes a half-wave plate, and magnets arranged with alternating polarities are used. The principle of operation of the rotator is confirmed by measurements. An isolator employing the rotator has a backward loss of 32 dB and a forward loss of 0.65 dB at 0.633-μm wavelength, where the forward loss is mainly due to Fresnel reflection losses.

© 1986 Optical Society of America

Simple, compact, high-performance permanent-magnet Faraday isolator

Daniel J. Gauthier, Paul Narum, and Robert W. Boyd
Opt. Lett. 11(10) 623-625 (1986)

Faraday rotation in coiled, monomode optical fibers: isolators, filters, and magnetic sensors

G. W. Day, D. N. Payne, A. J. Barlow, and J. J. Ramskov-Hansen
Opt. Lett. 7(5) 238-240 (1982)

Temperature-stable Faraday rotator material and its use in high-performance optical isolators

Shigetaka Matsumoto and Shizuo Suzuki
Appl. Opt. 25(12) 1940-1945 (1986)

Microisolator

Kazuo Shiraishi, Satoshi Sugaya, Kazutaka Baba, and Shojiro Kawakami
Appl. Opt. 25(2) 311-314 (1986)

Compact, remote optical waveguide magnetic field sensing using double-pass Faraday rotation-induced optical attenuation

Yunlong Guo, John Canning, Zenon Chaczko, and Gang-Ding Peng
Appl. Opt. 63(14) D35-D40 (2024)