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Proceedings Paper

Detection of ultrasonic vibrations on rough surfaces through the photorefractive effect
Author(s): Philippe Delaye; Alain Blouin; Louis-Anne de Montmorillon; Ivan Biaggio; Denis Drolet; Jean-Pierre Monchalin; Gerald Roosen
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Paper Abstract

We present and describe two techniques used for optical detection of ultrasonic signals based on the photorefractive effect. These techniques used the wavefront adaptation properties of the photorefractive effect. In the photorefractive beam combiner, a local oscillator matched to the signal wavefront is created, leading to an homodyne detection system having a large etendue. In the double phase conjugate heterodyne detection system the signal beam wavefront is cleaned by a double phase conjugate mirror and transformed in a plane wave that is sent on a classical heterodyne detection system. Both systems are characterized and used to detect ultrasound.

Paper Details

Date Published: 18 September 1996
PDF: 12 pages
Proc. SPIE 2782, Optical Inspection and Micromeasurements, (18 September 1996); doi: 10.1117/12.250776
Show Author Affiliations
Philippe Delaye, Institut d'Optique Theorique et Appliquee (France)
Institut des Materiaux Industriels (Canada)
Alain Blouin, Institut des Materiauz Industriels (Canada)
Louis-Anne de Montmorillon, Institut d'Optique Theorique et Appliquee (France)
Ivan Biaggio, Institut d'Optique Theorique et Appliquee (France)
Denis Drolet, Institut des Materiaux Industriels (Canada)
Jean-Pierre Monchalin, Institut des Materiaux Industriels (Canada)
Gerald Roosen, Institut d'Optique Theorique et Appliquee (France)

Published in SPIE Proceedings Vol. 2782:
Optical Inspection and Micromeasurements
Christophe Gorecki, Editor(s)

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