A distributed frequency modulation continuous wave fiber stress sensor based on a birefringent sagnac ring configuration |
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Authors: | Michael Campbell Gang Zheng Peter A. Wallace A. Sheila Holmes-Smith |
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Affiliation: | 1. Department of Physical Sciences, Glasgow Caledonian University, Cowcaddens Road, G4 OBA, Glasgow, UK
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Abstract: | A new distributed stress sensor, based on a birefringent fiber Sagnac ring configuration and frequency modulation continuous wave technology, has been investigated. The two forward-coupled mode beams in the Sagnac ring, induced by an applied stress at any given point along the fiber length, produce a beat frequency which can be analysed to determine, simultaneously, the magnitude and position of the stress. The system has a reasonable spatial resolution of 1 m in a dynamic sensing range of 50 m. |
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