Long period grating for acoustic wave detection

J.-O. Gaudron; F. Surre; T. Sun; K. T. V. Grattan

doi:10.1117/12.885080

19 May 2011 Long period grating for acoustic wave detection

J.-O. Gaudron, F. Surre, T. Sun, K. T. V. Grattan

Proceedings Volume 7753, 21st International Conference on Optical Fiber Sensors; 77539N (2011) https://doi.org/10.1117/12.885080
Event: 21st International Conference on Optical Fibre Sensors (OFS21), 2011, Ottawa, Canada

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.

Citation Download Citation

J.-O. Gaudron, F. Surre, T. Sun, and K. T. V. Grattan "Long period grating for acoustic wave detection", Proc. SPIE 7753, 21st International Conference on Optical Fiber Sensors, 77539N (19 May 2011); https://doi.org/10.1117/12.885080

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