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Proceedings Paper

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
Author(s): A. Theodosiou; M. Polis; A. Lacraz; K. Kalli; M. Komodromos; A. Stassis
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Paper 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.

Paper Details

Date Published: 28 April 2016
PDF: 10 pages
Proc. SPIE 9886, Micro-Structured and Specialty Optical Fibres IV, 98860O (28 April 2016); doi: 10.1117/12.2230792
Show Author Affiliations
A. Theodosiou, Cyprus Univ. of Technology (Cyprus)
Frederick Univ. (Cyprus)
M. Polis, Cyprus Univ. of Technology (Cyprus)
A. Lacraz, Cyprus Univ. of Technology (Cyprus)
K. Kalli, Cyprus Univ. of Technology (Cyprus)
M. Komodromos, Frederick Univ. (Cyprus)
A. Stassis, Cyprus Univ. of Technology (Cyprus)

Published in SPIE Proceedings Vol. 9886:
Micro-Structured and Specialty Optical Fibres IV
Kyriacos Kalli; Alexis Mendez, Editor(s)

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