Multiplexed FBG sensor recorded in multimode microstructured polymer optical fibre


Fibre Bragg gratings have been inscribed in multimode microstructured polymer optical fibre (POF), with a core size of 50μm. The microstructured POF (mPOF) consists of a three ring hole structure and is made purely from poly(methyl methacrylate) (PMMA). In comparison to silica fibre, POF has a much smaller Young's modulus and a much greater breaking strain; additionally multimode fibre holds advantages of ease of handling and launching conditions. A linear strain sensitivity of 1.32 ± 0.01pm/με has been measured in the range 0 to 2% strain. The fibre drawing process leads to a degree of molecular alignment along the fibre axis. This alignment can be thermally annealed out; this can induce a permanent blue shift in the Bragg wavelength of a grating fabricated prior to annealing by up to 20 nm. Utilising this, wavelength demultiplexed gratings can be fabricated using a single phase mask. As an illustration of this we present for the first time wavelength division multiplexing of the spectral response of three Bragg gratings in POF within the C-band region. Complementing this work, a technique of splicing mPOF to step index silica fibre is described using UV curing optical adhesive, allowing characterisation of Bragg gratings fabricated in this fibre.

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Divisions: College of Engineering & Physical Sciences > Aston Institute of Photonics Technology (AIPT)
Additional Information: Ian P. Johnson ; David J. Webb ; Kyriacos Kalli ; Maryanne C. J. Large and Alexander Argyros. "Multiplexed FBG sensor recorded in multimode microstructured polymer optical fibre", Proc. SPIE 7714, Photonic Crystal Fibers IV, 77140D (May 14, 2010). Copyright 2010 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. DOI:
Event Title: Photonic Crystal Fibres IV
Event Type: Other
Event Dates: 2010-04-14 - 2010-04-16
ISBN: 978-0-819-48187-0
Last Modified: 27 Jun 2024 12:23
Date Deposited: 21 Mar 2017 11:35
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Related URLs: http://www.scop ... tnerID=8YFLogxK (Scopus URL)
PURE Output Type: Conference contribution
Published Date: 2010-05-14
Authors: Johnson, Ian P.
Webb, David J. (ORCID Profile 0000-0002-5495-1296)
Kalli, Kyriacos
Large, Maryanne C.J.
Argyros, Alexander



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