Please use this identifier to cite or link to this item: http://ktisis.cut.ac.cy/handle/10488/7138
Title: Multiplexed fbg sensor recorded in multimode microstructured polymer optical fibre
Authors: Kalli, Kyriacos 
Argyros, Alexander 
Webb, David J. 
Johnson, Ian P.
Large, Maryanne C J 
Keywords: Wavelength division multiplexing;Fiber optics;Optical fibers;Photonic crystals;Polymers;Silica
Category: Electrical Engineering, Electronic Engineering, Information Engineering
Field: Engineering and Technology
Issue Date: 2010
Publisher: Spie Digital Library
Source: Photonic Crystal Fibers IV;14 -16 April 2010,Brussels, Belgium
Abstract: 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.
URI: http://ktisis.cut.ac.cy/handle/10488/7138
DOI: 10.1117/12.854410
Rights: © 2010 SPIE.
Type: Conference Papers
Appears in Collections:Δημοσιεύσεις σε συνέδρια/Conference papers

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