Influence of acoustic anisotropy in paratellurite on quasicollinear acousto-optic interaction

S N Mantsevich; V I Balakshy; V Ya Molchanov; K B Yushkov

doi:10.1016/j.ultras.2015.06.010

Influence of acoustic anisotropy in paratellurite on quasicollinear acousto-optic interaction

Ultrasonics. 2015 Dec:63:39-46. doi: 10.1016/j.ultras.2015.06.010. Epub 2015 Jun 20.

Authors

S N Mantsevich¹, V I Balakshy², V Ya Molchanov³, K B Yushkov³

Affiliations

¹ Physics Department, M.V. Lomonosov Moscow State University, GSP-2, Vorobevy Gory, 119991 Moscow, Russia. Electronic address: snmantsevich@yahoo.com.
² Physics Department, M.V. Lomonosov Moscow State University, GSP-2, Vorobevy Gory, 119991 Moscow, Russia.
³ National University of Science and Technology "MISIS", Leninsky Prospect 4, Moscow 119049, Russia.

PMID: 26118495
DOI: 10.1016/j.ultras.2015.06.010

Abstract

The influence of paratellurite acoustic anisotropy on the quasicollinear acousto-optic diffraction characteristics was examined. In the presented case the quasicollinear geometry of acousto-optic diffraction is realized with the use of acoustic beam reflection from one of the crystal surfaces. The simulations were based on the solution of acoustic beams propagation problem for anisotropic media previously presented in Balakshy and Mantsevich (2012). It is shown that media inhomogeneity affects the distribution of the acoustic energy in the ultrasound beam and the shape of wave fronts. The acoustic beam structure influences the characteristics of quasicollinear acousto-optic diffraction causing transformation of acousto-optic device transmission function shape and reducing the diffraction efficiency.

Keywords: Acoustic beam structure; Acousto-optic interaction; Media anisotropy; Quasicollinear geometry; Transmission function.