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Proceedings Paper

Nonlinearities in the high-current response of interferometric fiber-optic current sensors
Author(s): Klaus Bohnert; Philippe Gabus; Jürgen Nehring; Samuel Wiesendanger; Andreas Frank; Hubert Brändle
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Paper Abstract

The nonlinearities in the response of an interferometric fiber-optic current sensor associated with deviations of the light waves from perfect circular polarization are theoretically and experimentally investigated. The consequences for inherent temperature compensation of the Faraday effect by means of a non-90°-retarder are investigated for currents up to several 100 kA and temperatures between -40°C and 80°C. The results are of particular interest to sensors for high direct currents in the electro-winning industry where measurement accuracy to within ±0.1% is required up to 500 kA.

Paper Details

Date Published: 16 May 2008
PDF: 4 pages
Proc. SPIE 7004, 19th International Conference on Optical Fibre Sensors, 70040E (16 May 2008); doi: 10.1117/12.785758
Show Author Affiliations
Klaus Bohnert, ABB Ltd. (Switzerland)
Philippe Gabus, ABB Ltd. (Switzerland)
Jürgen Nehring, ABB Ltd. (Switzerland)
Samuel Wiesendanger, ABB Ltd. (Switzerland)
Andreas Frank, ABB Ltd. (Switzerland)
Hubert Brändle, ABB Ltd. (Switzerland)

Published in SPIE Proceedings Vol. 7004:
19th International Conference on Optical Fibre Sensors

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