Highly sensitive liquid level monitoring system utilizing polymer fiber Bragg gratings

Carlos A.F. Marques, Gang-Ding Peng, David J. Webb

Research output: Contribution to journalArticle

Abstract

A novel and highly sensitive liquid level sensor based on a polymer optical fiber Bragg grating (POFBG) is experimentally demonstrated. Two different configurations are studied and both configurations show the potential to interrogate liquid level by measuring the strain induced in a POFBG embedded in a silicone rubber diaphragm, which deforms due to hydrostatic pressure variations. The sensor exhibits a highly linear response over the sensing range and a good repeatability. For comparison, a similar sensor using a FBG inscribed in silica fiber is fabricated, which displays a sensitivity that is a factor of 5 smaller than the POFBG. The temperature sensitivity is studied and a novel multi-sensor arrangement proposed which has the potential to provide level readings independent of temperature and the liquid density.
Original languageEnglish
Pages (from-to)6058–6072
Number of pages15
JournalOptics Express
Volume23
Issue number5
Early online date26 Feb 2015
DOIs
Publication statusPublished - 9 Mar 2015

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liquid levels
Bragg gratings
fibers
optical fibers
sensors
polymers
silicone rubber
diaphragms
configurations
hydrostatic pressure
silicon dioxide
temperature
sensitivity
liquids

Bibliographical note

Funding: Marie Curie Intra European Fellowship included in the 7th
Framework Program of the European Union (POSSIBLE PIEF-GA-2013-628604 project).

Cite this

Marques, Carlos A.F. ; Peng, Gang-Ding ; Webb, David J. / Highly sensitive liquid level monitoring system utilizing polymer fiber Bragg gratings. In: Optics Express. 2015 ; Vol. 23, No. 5. pp. 6058–6072.
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Highly sensitive liquid level monitoring system utilizing polymer fiber Bragg gratings. / Marques, Carlos A.F.; Peng, Gang-Ding; Webb, David J.

In: Optics Express, Vol. 23, No. 5, 09.03.2015, p. 6058–6072.

Research output: Contribution to journalArticle

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