Twisted fibre electric current sensor with compensation for temperature and polarization perturbation

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)22_Publication in policy or professional journal

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Original languageEnglish
Pages (from-to)18-27
Journal / PublicationProceedings of SPIE - The International Society for Optical Engineering
Publication statusPublished - 1998
Externally publishedYes


TitleOptical and Fiber Optic Sensor Systems
Period16 - 19 September 1998


Electric current sensor employing twisted fibre 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 fibre 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 fibre in current sensor.

Research Area(s)

  • Current sensor, Faraday effect, Twisted fibre

Citation Format(s)