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.
|Title of host publication||Third Asia Pacific optical sensors conference|
|Editors||John Canning, Gangding D. Peng|
|Number of pages||7|
|Publication status||Published - 2012|
|Event||3rd Asia Pacific Optical Sensors Conference (APOS) - Sydney, Australia|
Duration: 31 Jan 2012 → 3 Feb 2012
|Conference||3rd Asia Pacific Optical Sensors Conference (APOS)|
|Period||31/01/12 → 3/02/12|
Bibliographical noteJohnson, Ian P.; Webb, David J.; Kalli, Kyriacos, "Hydrostatic pressure sensing using a polymer optical fibre Bragg gratings", Third Asia Pacific optical sensors conference. eds. John Canning; Gangding D. Peng., Vol. 8351 SPIE, 2012. (SPIE proceedings).
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