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

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 a...

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Veröffentlicht in:Crystallography reports 2011-05, Vol.56 (3), p.360-365
Hauptverfasser: Mityurich, G. S., Serdyukov, A. N.
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description 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.
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subjects AMPLITUDES
BEAMS
CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
COUPLING
Crystallography and Scattering Methods
CRYSTALS
Dedicated to the Memory of F.I. Fedorov
ENERGY ABSORPTION
EXCITATION
LASER RADIATION
LASERS
Physics
Physics and Astronomy
RESIDUAL STRESSES
RESOLUTION
SIGNALS
SOUND WAVES
STRAINS
title Thermooptical excitation of sound by Bessel light beams in crystalline media with internal stress
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