Electric current sensors employing spun highly-birefringent optical fibres

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).


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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 percent/°C and a sensitivity of 1 mA rms/ Hz^1/2. Further, we predict the performance of this sensor with optimized fiber length for a given measurement bandwidth.

Item Type: Article
Digital Object Identifier (DOI): doi:10.1109/50.41634
ISSNs: 0733-8724 (print)
Related URLs:
Subjects: Q Science > QC Physics
T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions : University Structure - Pre August 2011 > Optoelectronics Research Centre
ePrint ID: 78451
Accepted Date and Publication Date:
Date Deposited: 11 Mar 2010
Last Modified: 31 Mar 2016 13:13
URI: http://eprints.soton.ac.uk/id/eprint/78451

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