Peculiarities of acoustooptic interaction in media with strong acoustic anisotropy

Sergey Mantsevich , Vladimir Balakshy

Actually optoelectronic devices based on the acoustooptic (AO) interaction are widely used to control the optical radiation. Usually treating the AO interaction acoustic beam is considered to be ideal, this means that magnitude of acoustic wave is equal in all points and wave fronts are plane. But it is impossible to realize such beams in practice. Fundamental reasons for appearance of inhomogeneous acoustic beam are diffraction effects produced by finite size of transducer. Acoustic anisotropy also influences on the structure of acoustic beam. Nowadays crystals with extra large anisotropy of elastic properties such as tellurium dioxide, calomel and others are used in acoustooptics and it is obvious that in the process of AO devices characteristics evaluation it is not possible to neglect media anisotropy in which acoustic waves are being aroused. In the presented work general solution of acoustic beam diffraction in the anisotropic media was obtained. Structure of acoustic field was caclulated for several directions in the paratellurite crystal. Influence of acoustic field structure on the efficiency of AO interaction and AO filter transfer functions was examined.

Mots clés: acoustooptics; acoustic anisotropy; paratellurite

Domaines: Acoustique [physics.class-ph]

Sergey Mantsevich, Vladimir Balakshy. Peculiarities of acoustooptic interaction in media with strong acoustic anisotropy. Acoustics 2012, Apr 2012, Nantes, France. ⟨hal-00810622⟩