α-BaB₂O₄和Li₂B₄O₇晶体中的声光相互作用。

Acousto-optic interaction in alpha-BaB(2)O(4)and Li(2)B(4)O(7) crystals.

作者信息

Martynyuk-Lototska Irina, Mys Oksana, Dudok Taras, Adamiv Volodymyr, Smirnov Yevgen, Vlokh Rostyslav

机构信息

Institute of Physical Optics, Lviv, Ukraine.

出版信息

Appl Opt. 2008 Jul 1;47(19):3446-54. doi: 10.1364/ao.47.003446.

DOI:10.1364/ao.47.003446

PMID:18594591

Abstract

Experimental studies and analysis of acousto-optic diffraction in alpha-BaB(2)O(4) and Li(2)B(4)O(7) crystals are given. Ultrasonic wave velocity, elastic compliance and stiffness coefficients, and piezo-optic and photoelastic coefficients of alpha-BaB(2)O(4) and Li(2)B(4)O(7) crystals are determined. The acousto-optic figure of merit has been estimated for different possible geometries of acousto-optic interaction. It is shown that the acousto-optic figures of merit for alpha-BaB(2)O(4) crystals reach the value M(2)=(270 +/- 70) x 10(-15) s(3)/kg for the case of interaction with the slowest ultrasonic wave. The directions of propagation and polarization of those acoustic waves are obtained on the basis of construction of acoustic slowness surfaces. The acousto-optic diffraction is experimentally studied for alpha-BaB(2)O(4) and Li(2)B(4)O(7) crystals.

摘要

给出了α-BaB₂O₄和Li₂B₄O₇晶体中声光衍射的实验研究与分析。测定了α-BaB₂O₄和Li₂B₄O₇晶体的超声波速度、弹性柔顺系数和刚度系数，以及声光和光弹系数。针对不同可能的声光相互作用几何结构，估算了声光品质因数。结果表明，对于α-BaB₂O₄晶体，在与最慢超声波相互作用的情况下，声光品质因数达到M₂=(270±70)×10⁻¹⁵ s³/kg。基于声慢度面的构建，得到了这些声波的传播方向和偏振方向。对α-BaB₂O₄和Li₂B₄O₇晶体的声光衍射进行了实验研究。