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Proceedings Paper

Light diffraction with conservation of optical mode by slow shear acoustic wave in paratellurite
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Paper Abstract

This paper is devoted to analysis of acousto-optic Bragg diffraction in tellurium dioxide single crystal in case of bulk slow shear ultrasonic waves propagating in the material. The so-called 'isotropic' type of the diffraction by the acoustic wave is examined in the paper. Contrary to the well known 'isotropic' diffraction, the investigated acousto-optic interaction is characterized by conservation of initial optical mode int he crystal. It is proved that the discovered regime of isotropic interaction in an anisotropic material is similar to interaction in optically isotropic media. The paper acquaints with equation representing dependencies of Bragg incidence angles on acoustic frequency in the crystal. The derived equations are different from the known equations in isotropic media. Experimental results on measurements of frequency dependencies of Bragg incidences angles in paratellurite are presented in the paper. Peculiar dependencies of diffraction efficiency on amplitudes of acoustic waves are also discussed in this paper. Peculiar dependencies of diffraction efficiency of the examined isotropic interaction may be higher than the efficiency of the anisotropic scattering. As proved experimentally, maximum diffraction efficiency values for the investigated isotropic diffraction in tellurium dioxide may exceed 60 percent.

Paper Details

Date Published: 24 September 1999
PDF: 9 pages
Proc. SPIE 3900, 3rd International Conference on Optical Information Processing, (24 September 1999); doi: 10.1117/12.364574
Show Author Affiliations
Vitaly B. Voloshinov, Moscow State Univ. (Russia)
Alexander Yu. Tchernyatin, Moscow State Univ. (Russia)

Published in SPIE Proceedings Vol. 3900:
3rd International Conference on Optical Information Processing
Yuri V. Gulyaev, Editor(s)

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