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Proceedings Paper

Application of a photonic crystal fiber LPG for vibration monitoring
Author(s): I. M. Nascimento; G. Chesini; Marco Sousa; Jonas H. Osório; J. M. Baptista; Cristiano M. B. Cordeiro; Pedro A. S. Jorge
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Paper Abstract

A fiber optic sensor based on a long-period grating (LPG) inscribed in a photonic crystal fiber is investigated for vibration sensing for structural monitoring applications. In this paper, preliminary results are shown demonstrating the sensor ability to detect vibration induced in a test structure. The sensor frequency response when attached to a loudspeaker-acrylic plate stimulation system (tested in the range from 40 Hz to 2.5 kHz) is analyzed using an intensity based scheme with a tunable laser. An alternative interrogation scheme, where the vibration signal is retrieved from a spectral scan, is also demonstrated and analyzed showing promising characteristics for structural health monitoring.

Paper Details

Date Published: 20 May 2013
PDF: 4 pages
Proc. SPIE 8794, Fifth European Workshop on Optical Fibre Sensors, 87941L (20 May 2013); doi: 10.1117/12.2026723
Show Author Affiliations
I. M. Nascimento, INESC Porto (Portugal)
Univ. do Porto (Portugal)
G. Chesini, Univ. Estadual de Campinas (Brazil)
Marco Sousa, Univ. Federal do Pará (Brazil)
Jonas H. Osório, Univ. Estadual de Campinas (Brazil)
J. M. Baptista, INESC Porto (Portugal)
Univ. da Madeira (Portugal)
Cristiano M. B. Cordeiro, Univ. Estadual de Campinas (Brazil)
Pedro A. S. Jorge, INESC Porto (Portugal)

Published in SPIE Proceedings Vol. 8794:
Fifth European Workshop on Optical Fibre Sensors
Leszek R. Jaroszewicz, Editor(s)

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