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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
|Keywords:||FBG array;Femtosecond laser;Polymer optical fibres;Shape sensing;Surface displacement sampling||Category:||Electrical Engineering - Electronic Engineering - Information Engineering;Nano-Technology||Field:||Engineering and Technology||Issue Date:||1-Apr-2016||Publisher:||SPIE||Source:||Proceedings of SPIE - The International Society for Optical Engineering, 9886, art. no. 98860O||Journal:||Proceedings of SPIE - The International Society for Optical Engineering||Conference:||Micro-Structured and Specialty Optical Fibres IV||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||ISSN:||0277-786X||DOI:||10.1117/12.2230792||Rights:||© 2016 SPIE.||Type:||Conference Papers|
|Appears in Collections:||Δημοσιεύσεις σε συνέδρια/Conference papers|
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