Abstract

The influence of the acoustic beam energy walk-off on characteristics of anisotropic Bragg diffraction of light is studied theoretically by the example of a tellurium single crystal. Calculations for wide ranges of Bragg angles and ultrasound frequencies are produced on the basis of an original solution of the acousto–optic (AO) interaction problem, which takes into consideration the acoustic walk-off. It is established that the walk-off can substantially change the region of AO interaction, resulting in narrowing or broadening of the frequency characteristic depending on the crystal cut, acoustic frequency, incident light polarization, and walk-off angle sign.

© 2016 Optical Society of America

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