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Proceedings Paper

Hydrostatic pressure sensing using a polymer optical fibre Bragg gratings
Author(s): Ian P. Johnson; David J. Webb; Kyriacos Kalli
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Paper Abstract

The sensitivity of a fibre Bragg grating (FBG) sensor fabricated in polymer optical fibre (POF) to hydrostatic pressure was investigated for the first time. In this initial investigative work a reflected Bragg response of a FBG fabricated in multimode microstructured POF (MMmPOF) was monitored, whilst the hydrostatic pressure was increased up to 10MPa. Positive sensitivities were observed, meaning a positive wavelength shift to increasing pressure, as opposed to negative sensitivities monitored when using a FBG sensor fabricated in silica optical fibre. The FBG sensors fabricated in the MMmPOF gave fractional changes in wavelength and hence sensitivities of at least 64.05×10-6/MPa, which is some 25 times larger than the -2.50×10-6/MPa sensitivity of a FBG sensor fabricated in silica optical fibre that was measured in this work. Furthermore this work highlighted a decrease in sensitivity of the FBG sensor fabricated in the MMmPOF by some 50% by sealing the holes of the mPOF at the tip of the fibre with an adhesive. This offers the potential to tailor the response of the sensor to hydrostatic pressure.

Paper Details

Date Published: 31 January 2012
PDF: 7 pages
Proc. SPIE 8351, Third Asia Pacific Optical Sensors Conference, 835106 (31 January 2012); doi: 10.1117/12.914391
Show Author Affiliations
Ian P. Johnson, Aston Univ. (United Kingdom)
David J. Webb, Aston Univ. (United Kingdom)
Kyriacos Kalli, Cyprus Univ. of Technology (Cyprus)


Published in SPIE Proceedings Vol. 8351:
Third Asia Pacific Optical Sensors Conference

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