Ground-water monitoring using polymer optical fibre Bragg gratings

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.

Publication DOI: https://doi.org/10.1117/12.2541326
Divisions: Engineering & Applied Sciences > Engineering Systems & Management
Engineering & Applied Sciences > Aston Logistics and Systems Institute
Engineering & Applied Sciences
Engineering & Applied Sciences > Electrical, Electronic & Power Engineering
Engineering & Applied Sciences > Aston Institute of Photonics Technology
Additional Information: Copyright 2019 SPIE. One print or electronic copy may be made for personal use only. Systematic reproduction, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited. Funding: Aston Institute of Materials Research (AIMR).
Uncontrolled Keywords: FBG,Geotechnical monitoring,Polymer optical fibre,Soil,optical fibre Bragg grating,Electronic, Optical and Magnetic Materials,Condensed Matter Physics,Computer Science Applications,Applied Mathematics,Electrical and Electronic Engineering
Full Text Link:
Related URLs: https://www.spi ... 12.2541326.full (Publisher URL)
PURE Output Type: Conference article
Published Date: 2019-08-28
Accepted Date: 2019-08-01
Authors: Mehravar, Moura ( 0000-0002-2517-4475)
Yang, Hanrui
Zhang, Wei
Webb, Dave J. ( 0000-0002-5495-1296)

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