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Proceedings Paper

Interrogation of birefingent fiber sensors using non-reciprocal phase modulation
Author(s): Stephan Wildermuth; Klaus Bohnert; Hubert Brändle
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Paper Abstract

A novel reflective fiber interferometer with non-reciprocal phase modulation adapted from Sagnac-type fiber interferometers is used to measure the differential optical phase shift in polarimetric fiber sensors. The sensitive part consists of two birefringent fiber sections with balanced differential group delay. A key element is a 45°-Faraday-rotator that swaps the polarization states of the orthogonal light waves after their round trip through the two fiber sections. An integrated-optic birefringent phase modulator at the detector end of the sensor introduces the non-reciprocal phase modulation. The application of the interferometer to voltage sensing is experimentally demonstrated.

Paper Details

Date Published: 5 October 2009
PDF: 4 pages
Proc. SPIE 7503, 20th International Conference on Optical Fibre Sensors, 750344 (5 October 2009); doi: 10.1117/12.833589
Show Author Affiliations
Stephan Wildermuth, ABB Ltd. (Switzerland)
Klaus Bohnert, ABB Ltd. (Switzerland)
Hubert Brändle, ABB Ltd. (Switzerland)

Published in SPIE Proceedings Vol. 7503:
20th International Conference on Optical Fibre Sensors
Julian D. C. Jones, Editor(s)

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