Influence of acoustic energy walk-off on acousto-optic diffraction characteristics

被引：22

作者：

Balakshy, Vladimir I. ^{[1
]}

Voloshin, Andrey S. ^{[1
]}

Molchanov, Vladimir Ya. ^{[2
]}

机构：

[1] Moscow MV Lomonosov State Univ, Dept Phys, Moscow 119991, Russia

[2] Natl Univ Sci & Technol MISIS, Acoustoopt Res Ctr, Moscow 119049, Russia

来源：

ULTRASONICS | 2015年 / 59卷

关键词：

Acoustic anisotropy; Paratellurite; Acousto-optic interaction; Isotropic and anisotropic Bragg diffraction; Slanted phase grating; COUPLED-WAVE ANALYSIS; PARATELLURITE; PROPAGATION; CRYSTALS; GRATINGS; BEAMS;

D O I：

10.1016/j.ultras.2015.02.002

中图分类号：

O42 [声学];

学科分类号：

070206 ; 082403 ;

摘要：

Influence of acoustic beam energy walk-off on characteristics of Bragg diffraction of light is studied theoretically and experimentally by the example of a paratellurite single crystal. Two cases of isotropic and anisotropic light scattering are examined. Angular and frequency characteristics of acousto-optic interaction are calculated in wide ranges of Bragg angles and ultrasound frequencies by means of modified Raman-Nath equations. It is shown that the walk-off can substantially change the width of angular and frequency ranges, resulting in their narrowing or broadening subject to position of the operating point in the Bragg angle frequency characteristic. Coefficients of broadening are introduced for characterization of this effect. It is established that frequency dependences of the broadening coefficients are similar to the Bragg angle frequency characteristics. Experimental verification of the calculations is carried out with a paratellurite cell of 10.5 degrees crystal cut. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：102 / 108

页数：7

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