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Ground-water monitoring using polymer optical fibre Bragg gratings
Author(s): M. Mehravar; H. Yang; Wei Zhang; D. J. Webb
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Paper Abstract

Optical fibre Bragg grating sensors inscribed in polymer optical fibre have been shown to be sensitive to the water content of the medium surrounding the fibre and this property has been applied, for example, to the monitoring of humidity and the water content of aviation fuel. In this work we assess the feasibility of using such sensors for monitoring the saturation of soils, which is important for civil engineering applications. We find a very non-linear response, with a rapid increase in Bragg wavelength as the water content increases from 0 to 0.5%, with a much more gradual, but still monotonic, increase thereafter. We speculate on the causes of this response.

Paper Details

Date Published: 28 August 2019
PDF: 4 pages
Proc. SPIE 11199, Seventh European Workshop on Optical Fibre Sensors, 111991M (28 August 2019); doi: 10.1117/12.2541326
Show Author Affiliations
M. Mehravar, Aston Univ. (United Kingdom)
H. Yang, Aston Univ. (United Kingdom)
Northeast Electric Power Univ. (China)
Wei Zhang, Cranfield Univ. (United Kingdom)
D. J. Webb, Aston Univ. (United Kingdom)


Published in SPIE Proceedings Vol. 11199:
Seventh European Workshop on Optical Fibre Sensors
Kyriacos Kalli; Sinead O. O'Keeffe; Gilberto Brambilla, Editor(s)

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