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Electric current sensors employing spun highly-birefringent optical fibres

Electric current sensors employing spun highly-birefringent optical fibres
Electric current sensors employing spun highly-birefringent optical fibres
Highly elliptically birefringent fibers have been fabricated by spinning a linearly birefringent fiber during the draw. These fibers are particularly interesting for application as Faraday-effect fiber current monitors, since, in contrast with conventional fibers, they can be wound in small multiturn coils while retaining their sensitivity. The fiber and its exploitation in three optical schemes are modeled using Jones calculus and also experimentally investigated. A simple optical configuration is proposed, combining the elliptically birefringent fiber and a broad-spectrum light source. An accurate, compact, and robust current monitor is obtained. The sensor is characterized by a measurement repeatability of ± 0.5 percent, a temperature drift of 0.05 %/°C and a sensitivity of 1 mA rms/ Hz½. Further, we predict the performance of this sensor with optimized fiber length for a given measurement bandwidth.
0733-8724
2084-2094
Laming, R.I.
c86f359b-9145-4148-bc7d-ae4f3d272ca2
Payne, D.N.
4f592b24-707f-456e-b2c6-8a6f750e296d
Laming, R.I.
c86f359b-9145-4148-bc7d-ae4f3d272ca2
Payne, D.N.
4f592b24-707f-456e-b2c6-8a6f750e296d

Laming, R.I. and Payne, D.N. (1989) Electric current sensors employing spun highly-birefringent optical fibres. IEEE Journal of Lightwave Technology, 7 (12), 2084-2094. (doi:10.1109/50.41634).

Record type: Article

Abstract

Highly elliptically birefringent fibers have been fabricated by spinning a linearly birefringent fiber during the draw. These fibers are particularly interesting for application as Faraday-effect fiber current monitors, since, in contrast with conventional fibers, they can be wound in small multiturn coils while retaining their sensitivity. The fiber and its exploitation in three optical schemes are modeled using Jones calculus and also experimentally investigated. A simple optical configuration is proposed, combining the elliptically birefringent fiber and a broad-spectrum light source. An accurate, compact, and robust current monitor is obtained. The sensor is characterized by a measurement repeatability of ± 0.5 percent, a temperature drift of 0.05 %/°C and a sensitivity of 1 mA rms/ Hz½. Further, we predict the performance of this sensor with optimized fiber length for a given measurement bandwidth.

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Published date: 1989
Organisations: Optoelectronics Research Centre

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Local EPrints ID: 78451
URI: http://eprints.soton.ac.uk/id/eprint/78451
ISSN: 0733-8724
PURE UUID: 6cb99413-116a-426b-a133-140d62ab7cb3

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Date deposited: 11 Mar 2010
Last modified: 14 Mar 2024 00:14

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Author: R.I. Laming
Author: D.N. Payne

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