Ultrasonic diffraction of Bessel light beams in uniaxial gyrotropic crystals

Specific features of the acousto-optic diffraction of Bessel light beams propagating in the vicinity of the optical axis of a uniaxial gyrotropic crystal have been investigated. The dependences of the diffraction efficiency on the acousto-optic interaction length, ultrasound power, and polarization...

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Bibliographic Details
Published in:Optics and spectroscopy 2016-09, Vol.121 (3), p.424-430
Main Authors: Belyi, V. N., Kulak, G. V., Krokh, G. V., Ropot, P. I., Shakin, O. V.
Format: Article
Language:English
Subjects:
Beams (radiation)
Diffraction efficiency
Elliptical polarization
Lasers
Light beams
Light diffraction
Optical Devices
Optics
Photonics
Physical Optics
Physics
Physics and Astronomy
Synchronism
Wave diffraction
Wave equations
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Summary:Specific features of the acousto-optic diffraction of Bessel light beams propagating in the vicinity of the optical axis of a uniaxial gyrotropic crystal have been investigated. The dependences of the diffraction efficiency on the acousto-optic interaction length, ultrasound power, and polarization state of the incident Bessel light beam have been analyzed using the coupled-wave equations and the overlap-integral method. It is shown that polarization-independent diffraction of Bessel light beams is observed in paratellurite crystals, when the Bragg diffraction efficiency is independent of the polarization state of the incident beam. The physical reason for this diffraction has been established (both theoretically and experimentally) to be simultaneous implementation of two processes of anisotropic scattering, at which the Bragg synchronism conditions are satisfied for orthogonal polarized Bessel beams with elliptical polarization.
ISSN:0030-400X
1562-6911
DOI:10.1134/S0030400X1609006X