Photoelastic properties of NaBi(MoO4)2 crystals.

In this work we present the results of comprehensive studies of the piezo-optic and elasto-optic effects in NaBi(MoO) crystals. The full matrices of the piezo-optic and elasto-optic coefficients for the NaBi(MoO) crystals are obtained for the first time, to the best of our knowledge. The acousto-optic effect in the NaBi(MoO) is analyzed for the case of interactions of optical waves with the slowest acoustic waves.

Acoustic anisotropy of acoustooptic TI(3)AsS(4) crystals.

We present comprehensive experimental measurements and analysis of anisotropy of the acoustic wave velocities for TI(3)AsS(4) 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 v(23) and v(32), which are both equal to 630 m/s. It is shown that the efficiency of acoustooptic (AO) interactions in TI(3)AsS(4) can be notably increased when providing anisotropic interaction with the slowest transverse acoustic wave.