| Issue |
J. Phys. Colloques
Volume 48, Number C7, Décembre 1987
1st International Laser M2P Conference
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|---|---|---|
| Page(s) | C7-533 - C7-535 | |
| DOI | https://doi.org/10.1051/jphyscol:19877127 | |
1st International Laser M2P Conference
J. Phys. Colloques 48 (1987) C7-533-C7-535
DOI: 10.1051/jphyscol:19877127
Laboratoire de Spectrométrie Physique, associé au CNRS et Celphyra, Université Scientifique, Technologique et Médicale de Grenoble, BP 87, F-38402 Saint-Martin-d'Hères Cedex, France
J. Phys. Colloques 48 (1987) C7-533-C7-535
DOI: 10.1051/jphyscol:19877127
OPTICAL GENERATION OF ULTRASONIC WAVES BY THE TRANSIENT GRATING METHOD : APPLICATION TO ACOUSTIC PROPERTY MEASUREMENTS
R. CASALEGNO and M. PIERRELaboratoire de Spectrométrie Physique, associé au CNRS et Celphyra, Université Scientifique, Technologique et Médicale de Grenoble, BP 87, F-38402 Saint-Martin-d'Hères Cedex, France
Abstract
Efficient production of coherent phonons by spatially periodic impulsive heating is shown to be a very well established method and to give reliable measurements of strong acoustic attenuation. Special care is taken to eliminate size effects. The technique is applied to a polymer material undergoing a glass-rubber phase transition.