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Title: Comparative study of multimode CYTOP graded index and single-mode silica fibre Bragg grating array for the mode shape capturing of a free-free metal beam
Authors: Theodosiou, Antreas 
Polis, Michael 
Lacraz, Amédéé 
Kalli, Kyriacos 
Komodromos, Michael 
Stassis, Andreas 
Keywords: FBG array
Femtosecond laser
Polymer optical fibres
Shape sensing
Surface displacement sampling
Issue Date: 1-Apr-2016
Publisher: SPIE
Source: Micro-Structured and Specialty Optical Fibres IV; Brussels; Belgium; 4 April 2016 through 6 April 2016
Abstract: The work described in this paper involved two different material fibre Bragg grating (FBG) arrays, investigating their performance as quasi-distributed sensors by capturing the vibrating response of a free-free metal beam close to its resonance frequencies. A six meter length of low-loss, gradient-index, multimode CYTOP fibre and of SMF-28 were used for the inscription of multiple FBG sensors using a femtosecond laser inscription method. The FBG arrays were multiplexed in the wavelength domain using a high-speed commercial demodulator, from which we recovered wavelengthand time-dependent displacement information. We compared the vibration response of the two arrays and using a novel computation algorithm we extract the first mode shape of the free-free metal beam that was exited at its first resonance frequency using a vibrating force.
ISBN: 978-151060131-4
Rights: © 2016 SPIE.
Appears in Collections:Δημοσιεύσεις σε συνέδρια/Conference papers

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