Ground-water monitoring using polymer optical fibre Bragg gratings

M. Mehravar; H. Yang; Wei Zhang; D. J. Webb

doi:10.1117/12.2541326

28 August 2019 Ground-water monitoring using polymer optical fibre Bragg gratings

M. Mehravar, H. Yang, Wei Zhang, D. J. Webb

Proceedings Volume 11199, Seventh European Workshop on Optical Fibre Sensors; 111991M (2019) https://doi.org/10.1117/12.2541326
Event: Seventh European Workshop on Optical Fibre Sensors, 2019, Limassol, Cyprus

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.

Citation Download Citation

M. Mehravar, H. Yang, Wei Zhang, and D. J. Webb "Ground-water monitoring using polymer optical fibre Bragg gratings", Proc. SPIE 11199, Seventh European Workshop on Optical Fibre Sensors, 111991M (28 August 2019); https://doi.org/10.1117/12.2541326

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