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Thermooptical excitation of sound by Bessel light beams in crystalline media with internal stress

Thermooptical excitation of sound by Bessel light beams in crystalline media with internal stress Abstract The thermooptical excitation of sound by Bessel light beams in crystalline media with internal stress has been studied. The dependence of the thermoelastic coupling coefficient, which is due to the modulated absorption of laser radiation, on the initial strain in a crystalline sample is taken into account. The expression for the photoacoustic signal amplitude is obtained, and it is shown that, in the range of high modulation frequencies of TE modes of Bessel light beams, resonant phenomena occur which can be used to increase the resolution of laser photoacoustic diagnostics of elastically strained crystals. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Crystallography Reports Springer Journals

Thermooptical excitation of sound by Bessel light beams in crystalline media with internal stress

Crystallography Reports , Volume 56 (3): 6 – May 1, 2011

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References (13)

Publisher
Springer Journals
Copyright
2011 Pleiades Publishing, Ltd.
ISSN
1063-7745
eISSN
1562-689X
DOI
10.1134/s1063774511030175
Publisher site
See Article on Publisher Site

Abstract

Abstract The thermooptical excitation of sound by Bessel light beams in crystalline media with internal stress has been studied. The dependence of the thermoelastic coupling coefficient, which is due to the modulated absorption of laser radiation, on the initial strain in a crystalline sample is taken into account. The expression for the photoacoustic signal amplitude is obtained, and it is shown that, in the range of high modulation frequencies of TE modes of Bessel light beams, resonant phenomena occur which can be used to increase the resolution of laser photoacoustic diagnostics of elastically strained crystals.

Journal

Crystallography ReportsSpringer Journals

Published: May 1, 2011

Keywords: Crystallography and Scattering Methods

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