Acousto-optic interaction in an optically biaxial crystalline medium under propagation of light close to one of the optical axes of a potassium arsenate titanyl KTiOAsO4 crystal has been studied. The experimental dependences of the intensity of a diffracted optical beam on the angle of light incidence on an ultrasonic wave have been obtained. It has been shown that a flat cut of a wave-vector surface provides development of an ultra-wide-aperture and ultra-wide-band acousto-optic def lector to control radiation in the visible and infrared electromagnetic spectral ranges.
42.30.-d Imaging and optical processing
$^1$Faculty of Physics, Lomonosov Moscow State University\
$^2$V.S. Sobolev Institute of geology and mineralogy SB RAS\\
$^3$V.S. Sobolev Institute of geology and mineralogy SB RAS\
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