Demonstration of Pressure Wave Observation by Acousto-Optic Sensing Using a Self-Mixing Interferometer

Sébastien Maqueda; Julien Perchoux; Clément Tronche; José Javier Imas González; Marc Genetier; Maylis Lavayssière; Yohan Barbarin

doi:10.3390/s23073720

Demonstration of Pressure Wave Observation by Acousto-Optic Sensing Using a Self-Mixing Interferometer

Sensors (Basel). 2023 Apr 4;23(7):3720. doi: 10.3390/s23073720.

Authors

Sébastien Maqueda^{1

2}, Julien Perchoux¹, Clément Tronche¹, José Javier Imas González¹, Marc Genetier², Maylis Lavayssière², Yohan Barbarin²

Affiliations

¹ Laboratoire d'Analyse et d'Architecture des Systèmes (LAAS-CNRS), Centre National de la Recherche Scientifique (CNRS), Institut National Polytechnique de Toulouse (INPT), Université de Toulouse, 2 Rue Charles Camichel, 31000 Toulouse, France.
² Commissariat à l'Energie Atomique et aux Energies Alternatives (CEA), Direction des Applications Militaires (DAM), 46500 Gramat, France.

Abstract

In this paper, we demonstrate that a compact and inexpensive interferometric sensor based on the self-mixing effect in the laser cavity can be used for the characterization of shock waves. The sensor measures the changes in the refractive index induced by the shock wave. It is based on the self-mixing interferometry scheme. We describe the architecture of the dynamic sensor and the design of the experimental setup used for the characterization that involves a shock tube. Thus, we detail the experimental measurements for shock wave pressure amplitude of 5 bar and address their interpretation with regard to the most admitted models for acousto-optics.

Keywords: acousto-optic sensor; laser sensor; self-mixing interferometer; shock waves.

Grants and funding

This research was funded by CEA and the French Region Occitanie. The work was carried out in partnership between C.E.A. Gramat and the Laboratory of Analysis and Architecture of Systems (LAAS-CNRS Toulouse) within the framework of the Laboratory of Conventioned Research—corresponding research laboratory on instrumentation and ultra-fast sensors (LRC—LICUR).