Application of a photonic crystal fiber LPG for vibration monitoring

I. M. Nascimento; G. Chesini; Marco Sousa; Jonas H. Osório; J. M. Baptista; Cristiano M. B. Cordeiro; Pedro A. S. Jorge

doi:10.1117/12.2026723

20 May 2013 Application of a photonic crystal fiber LPG for vibration monitoring

I. M. Nascimento, G. Chesini, Marco Sousa, Jonas H. Osório, J. M. Baptista, Cristiano M. B. Cordeiro, Pedro A. S. Jorge

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.

Citation Download Citation

I. M. Nascimento, G. Chesini, Marco Sousa, Jonas H. Osório, J. M. Baptista, Cristiano M. B. Cordeiro, and 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); https://doi.org/10.1117/12.2026723

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