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

Faraday rotation in coiled, monomode optical fibres: isolators, filters and magnetic sensors
Faraday rotation in coiled, monomode optical fibres: isolators, filters and magnetic sensors
It is shown that efficient Faraday rotation can be obtained in a fiber coil if the circumference of the coil is exactly equal to the beat length of the birefringence caused by bending. The essential elements of a practical, compact isolator based on this principle are demonstrated. Forty-five degrees of Faraday rotation were obtained in a 40-turn, 15-mm-diameter coil placed in the field of a permanent magnet (~0.29 T). The design of optical filters and magnetic sensors is also discussed.
0146-9592
238-240
Day, G.W.
68cbf9c4-a670-43ac-a346-6be39a8ad2f6
Payne, D.N.
4f592b24-707f-456e-b2c6-8a6f750e296d
Barlow, A.J.
cd6d87fa-c4a4-4c45-9bfa-db4c8834e770
Ramskov Hansen, J.J.
976a618b-c7b2-404b-a01e-74620613393c
Day, G.W.
68cbf9c4-a670-43ac-a346-6be39a8ad2f6
Payne, D.N.
4f592b24-707f-456e-b2c6-8a6f750e296d
Barlow, A.J.
cd6d87fa-c4a4-4c45-9bfa-db4c8834e770
Ramskov Hansen, J.J.
976a618b-c7b2-404b-a01e-74620613393c

Day, G.W., Payne, D.N., Barlow, A.J. and Ramskov Hansen, J.J. (1982) Faraday rotation in coiled, monomode optical fibres: isolators, filters and magnetic sensors. Optics Letters, 7 (5), 238-240. (doi:10.1364/OL.7.000238).

Record type: Article

Abstract

It is shown that efficient Faraday rotation can be obtained in a fiber coil if the circumference of the coil is exactly equal to the beat length of the birefringence caused by bending. The essential elements of a practical, compact isolator based on this principle are demonstrated. Forty-five degrees of Faraday rotation were obtained in a 40-turn, 15-mm-diameter coil placed in the field of a permanent magnet (~0.29 T). The design of optical filters and magnetic sensors is also discussed.

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Published date: 1982

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Local EPrints ID: 78656
URI: https://eprints.soton.ac.uk/id/eprint/78656
ISSN: 0146-9592
PURE UUID: 7b2bf6a5-eda0-458a-a0ee-2d0e42f9e26e

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Date deposited: 11 Mar 2010
Last modified: 29 Nov 2018 17:32

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Contributors

Author: G.W. Day
Author: D.N. Payne
Author: A.J. Barlow
Author: J.J. Ramskov Hansen

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