Abstract
We present comprehensive experimental measurements and analysis of anisotropy of the acoustic wave velocities for crystals, including the obliquity and nonorthogonality of the acoustic waves, and the deviations from purely longitudinal and transverse polarization types. We have found that the crystals under analysis are characterized by rather low transverse wave velocities and , which are both equal to 630 m/s. It is shown that the efficiency of acoustooptic (AO) interactions in can be notably increased when providing anisotropic interaction with the slowest transverse acoustic wave. Under the previously mentioned conditions, the AO figure-of-merit can be estimated to be extremely high, i.e., approximately .
© 2015 Optical Society of America
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