Hydrostatic pressure sensing using a polymer optical fibre Bragg gratings

Ian P. Johnson, David J. Webb, Kyriacos Kalli

Research output: Chapter in Book/Published conference outputConference publication


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.
Original languageEnglish
Title of host publicationThird Asia Pacific optical sensors conference
EditorsJohn Canning, Gangding D. Peng
Number of pages7
ISBN (Print)978-0-8194-9027-8
Publication statusPublished - 2012
Event3rd Asia Pacific Optical Sensors Conference (APOS) - Sydney, Australia
Duration: 31 Jan 20123 Feb 2012

Publication series

NameSPIE proceedings
ISSN (Print)0277-786X


Conference3rd Asia Pacific Optical Sensors Conference (APOS)

Bibliographical note

Johnson, 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).

Copyright notice format: Copyright 2012 Society of Photo-Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.



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