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Title: Hydrostatic pressure sensing using a polymer optical fibre bragg gratings
Authors: Kalli, Kyriacos 
Johnson, Ian P.
Webb, David J. 
Keywords: Hydrostatics
Photonic crystals
Optical fibers
Plastic optical fibers
Issue Date: 2012
Publisher: Spie Digital Library
Source: 3rd Asia Pacific Optical Sensors Conference; NSW;31 January - February 2012; Sydney
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.
DOI: 10.1117/12.914391
Rights: © 2011 Society of Photo-Optical Instrumentation Engineers (SPIE).
Appears in Collections:Δημοσιεύσεις σε συνέδρια/Conference papers

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