30 January 2012 Hydrostatic pressure sensing using a polymer optical fibre Bragg gratings
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Proceedings Volume 8351, Third Asia Pacific Optical Sensors Conference; 835106 (2012) https://doi.org/10.1117/12.914391
Event: Asia Pacific Optical Sensors Conference, 2012, Sydney, Australia
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.
© (2012) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Ian P. Johnson, Ian P. Johnson, David J. Webb, David J. Webb, Kyriacos Kalli, Kyriacos Kalli, } "Hydrostatic pressure sensing using a polymer optical fibre Bragg gratings", Proc. SPIE 8351, Third Asia Pacific Optical Sensors Conference, 835106 (30 January 2012); doi: 10.1117/12.914391; https://doi.org/10.1117/12.914391
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