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Proceedings Paper

Twisted-fiber electric current sensor with compensation for temperature and polarization perturbation
Author(s): Xiaopeng Dong; Beatrice C.B. Chu; Kin Seng Chiang
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Paper Abstract

Electric current sensor employing twisted fiber with a new compensation method for temperature and polarization perturbation is presented and demonstrated for ac current detection. The problem of sensor bias drifting caused by the change of twist induced circular birefringence of the fiber versus the ambient temperature, or by the mechanical perturbations in the sensor leads, is addressed and solved by a novel signal processing method. With the single Wollaston prism scheme described in the paper, the compensation is valid only for limited bias phase drift. However, when the modified compensation scheme is introduced, the current signal can be obtained for arbitrary bias phase drift. The compensation method is demonstrated effective and which provides a new approach for the practical application of twisted fiber in current sensor.

Paper Details

Date Published: 13 August 1998
PDF: 10 pages
Proc. SPIE 3555, Optical and Fiber Optic Sensor Systems, (13 August 1998); doi: 10.1117/12.318160
Show Author Affiliations
Xiaopeng Dong, Univ. of Science and Technology of China (China)
Beatrice C.B. Chu, City Univ. of Hong Kong (Hong Kong)
Kin Seng Chiang, City Univ. of Hong Kong (Hong Kong)


Published in SPIE Proceedings Vol. 3555:
Optical and Fiber Optic Sensor Systems
Shanglian Huang; Kim D. Bennett; David A. Jackson, Editor(s)

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