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Proceedings Paper

Long period grating for acoustic wave detection
Author(s): J.-O. Gaudron; F. Surre; T. Sun; K. T. V. Grattan
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Paper Abstract

In this work a long period grating (LPG)-based optical fibre sensor system has been specifically configured and set up for the acoustic wave detection. In doing so a long period grating, placed between two pillars, is exposed to acoustic waves generated by a loudspeaker placed at a certain distance. With the variation of the magnitude and frequency of the acoustic signal, the long period grating-based sensor system has been observed to be sensitive to some specific frequencies, irrespective of the intensity variation of the acoustic signals generated. Further investigation has shown that the distance between the pillars is able to tune these specific frequency ranges, allowing for an optimized detection using a long period grating. The positive results obtained have shown the potential for the LPG-based technique to be used for acoustic wave detection in various media, such as fluids, and/or solids.

Paper Details

Date Published: 19 May 2011
PDF: 4 pages
Proc. SPIE 7753, 21st International Conference on Optical Fiber Sensors, 77539N (19 May 2011); doi: 10.1117/12.885080
Show Author Affiliations
J.-O. Gaudron, The City Univ. (United Kingdom)
F. Surre, The City Univ. (United Kingdom)
T. Sun, The City Univ. (United Kingdom)
K. T. V. Grattan, The City Univ. (United Kingdom)

Published in SPIE Proceedings Vol. 7753:
21st International Conference on Optical Fiber Sensors
Jacques Albert; Wojtek J. Bock, Editor(s)

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