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|Title:||Multiplexed fbg sensor recorded in multimode microstructured polymer optical fibre||Authors:||Kalli, Kyriacos
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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