Please use this identifier to cite or link to this item: https://hdl.handle.net/20.500.14279/9218
Τίτλος: Modified fs-Laser Inscribed FBG Array for Rapid Mode Shape Capture of Free-Free Vibrating Beams
Συγγραφείς: Theodosiou, Antreas 
Lacraz, Amédéé 
Polis, Michael 
Kalli, Kyriacos 
Tsangari, Maria 
Stassis, Andreas 
Komodromos, Michael 
Major Field of Science: Engineering and Technology
Field Category: Electrical Engineering - Electronic Engineering - Information Engineering;Mechanical Engineering
Λέξεις-κλειδιά: Bragg grating sensors;Surface displacement sampling;Femtosecond laser;Optical fiber sensors;Shape sensing
Ημερομηνία Έκδοσης: 15-Ιου-2016
Πηγή: IEEE Photonics Technology Letters, 2016, vol. 28, no. 14, pp. 1509-1512
Volume: 28
Issue: 14
Start page: 1509
End page: 1512
Περιοδικό: IEEE Photonics Technology Letters 
Περίληψη: We report on the development of a multiplexed sensor array of fiber Bragg gratings (FBGs), inscribed using a femtosecond laser, and its demonstration as a quasi-distributed sensor to capture the mode shapes, through surface displacement sampling, of a free-free vibrating beam. Our method is based on a plane-by-plane inscription approach, whereby a 2-D index change is written across the fiber core, controlling the width and depth of the modified region. This allows for the fast inscription of multiple wavelength FBGs in coated optical fibers, with the advantage of less stringent alignment requirements. The FBGs are multiplexed in the wavelength domain using a high-speed demodulator, using a fast, custom-made computational algorithm. We recover rapid and single-step wavelength- and time-dependent displacement information, extracting the first two mode shapes of a vibrating beam and their respective degrees of freedom resonance frequencies in <0.4 s.
URI: https://hdl.handle.net/20.500.14279/9218
ISSN: 10411135
DOI: 10.1109/LPT.2016.2555852
Rights: © IEEE
Type: Article
Affiliation: Cyprus University of Technology 
Frederick University 
Publication Type: Peer Reviewed
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