Balakshy Vladimir, Voloshin Andrey
Appl Opt. 2016 Jun 10;55(17):4542-9. doi: 10.1364/AO.55.004542.
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.
以碲单晶为例，从理论上研究了声束能量离散对各向异性光布拉格衍射特性的影响。基于声光（AO）相互作用问题的原始解，对宽范围的布拉格角和超声频率进行了计算，该解考虑了声离散。结果表明，离散会显著改变AO相互作用区域，根据晶体切割、声频率、入射光偏振和声离散角符号，导致频率特性变窄或变宽。
