Ground-water monitoring using polymer optical fibre Bragg gratings

Moura Mehravar; Hanrui Yang; Wei Zhang; Dave J. Webb

doi:10.1117/12.2541326

Ground-water monitoring using polymer optical fibre Bragg gratings

Moura Mehravar, Hanrui Yang, Wei Zhang, Dave J. Webb

Research output: Contribution to journal › Conference article › peer-review

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.

Original language	English
Article number	111991M
Journal	Proceedings of SPIE - International Society for Optical Engineering
Volume	11199
DOIs	https://doi.org/10.1117/12.2541326
Publication status	Published - 28 Aug 2019
Event	Seventh European Workshop on Optical Fibre Sensors (EWOFS 2019) - Limassol, Cyprus Duration: 1 Oct 2019 → 4 Oct 2019

Bibliographical note

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).

Keywords

FBG
Geotechnical monitoring
Polymer optical fibre
Soil
optical fibre Bragg grating

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Cite this

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title = "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. ",

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AU - Yang, Hanrui

AU - Zhang, Wei

AU - Webb, Dave J.

N1 - 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).

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N2 - 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.

AB - 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.

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KW - Soil

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U2 - 10.1117/12.2541326

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VL - 11199

JO - Proceedings of SPIE - International Society for Optical Engineering

JF - Proceedings of SPIE - International Society for Optical Engineering

M1 - 111991M

T2 - Seventh European Workshop on Optical Fibre Sensors (EWOFS 2019)

Y2 - 1 October 2019 through 4 October 2019

ER -

Ground-water monitoring using polymer optical fibre Bragg gratings

Abstract

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Keywords

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