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Proceedings 2017, 1(4), 348; doi:10.3390/proceedings1040348

Characterization of Acoustic Sources by Optical Feedback Interferometry

1
Laboratory for Analysis and Architecture of Systems(LAAS-CNRS), Université de Toulouse, CNRS, INP, Toulouse, France
2
Universidad Politécnica Salesiana, Cuenca, Ecuador
Presented atthe Eurosensors 2017 Conference, Paris, France, 3–6 September 2017.
*
Author to whom correspondence should be addressed.
Published: 23 August 2017
Download PDF [424 KB, uploaded 13 October 2017]

Abstract

Sound can be described as the propagation of pressure variations in compressible media that involves compression and expansion and induces a change in the density of the medium. This change in acoustic pressure as it induces a change of the refractive index can be measured by optical methods, the most recent being the optical feedback interferometry. With this technique, a laser diode is beaming on a reflective surface thus creating a cavity where the acoustic wave propagates. This paper presents anovel experimental technique to measure radiation pattern of acoustic sources based on optical feedback interferometry in a laser diode.
Keywords: optical feedbackinterferometry; acoustic; ultrasound; radiation pattern optical feedbackinterferometry; acoustic; ultrasound; radiation pattern
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Urgiles, F.; Perchoux, J.; Bosch, T. Characterization of Acoustic Sources by Optical Feedback Interferometry. Proceedings 2017, 1, 348.

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