Proceedings PaperClose to collinear acousto-optical interaction in TeO2 single crystal
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Anisotropic Bragg diffraction of light on ultrasound propagating along (110) axis or close to the axis in TeO2 is examined. Special attention is devoted to close to collinear scattering in paratellurite with a long length of interaction. The investigated case of the diffraction is characterized by a collinear orientation of optical and ultrasonic group velocity vectors resulting in the interaction length up to several centimeters and extremely narrow frequency bands of Bragg scattering.