We demonstrate a Faraday circulator or isolator that uses a silica-core, single-mode, birefringent fiber as the active medium and small permanent magnets for the magnetic field. Circulators were constructed for wavelengths of 632.8 and 830 nm using about 2 m of fiber. This is the first description to our knowledge of such potentially useful working devices made in birefringent fiber. Bandwidth and temperature dependence were also investigated.
© 1981 Optical Society of America
Original Manuscript: December 22, 1980
Revised Manuscript: April 21, 1981
Published: July 1, 1981
E. H. Turner and R. H. Stolen, "Fiber Faraday circulator or isolator," Opt. Lett. 6, 322-323 (1981)