20 May 2013 Application of a photonic crystal fiber LPG for vibration monitoring
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Proceedings Volume 8794, Fifth European Workshop on Optical Fibre Sensors; 87941L (2013) https://doi.org/10.1117/12.2026723
Event: Fifth European Workshop on Optical Fibre Sensors, 2013, Krakow, Poland
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.
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I. M. Nascimento, G. Chesini, Marco Sousa, Jonas H. Osório, J. M. Baptista, Cristiano M. B. Cordeiro, Pedro A. S. Jorge, "Application of a photonic crystal fiber LPG for vibration monitoring", Proc. SPIE 8794, Fifth European Workshop on Optical Fibre Sensors, 87941L (20 May 2013); doi: 10.1117/12.2026723; https://doi.org/10.1117/12.2026723
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