TWO-DIMENSIONAL NEARLY ABSENT-DIFFRACTED LIGHT BEAM TRANSFORMATION UNDER ACOUSTOOPTICAL INTERACTION IN UNIAXIAL CRYSTALS
Abstract
Participants of shape transformation of two-dimensional nearly absent-diffracted (cosine-supergaussian) light beams under Braggs diffraction by ultrasonic waves in iniaxial gyrotropic crystals are investigated. It is shown that at diffraction of such light beams travelling in the vicinity of the crystal optical axis on a slow shear ultrasonic wave under the conditions of a strong acoustooptical interaction, light beams experience a significant deformation of the intensity distribution in the beam cross section. At large widths of a supergaussian component of an incident beam, the shape of a diffracted beam remains underchanged. It is stated that the diffraction efficiency weakly depends on the width of the supergaussian component of the cosine-supergaussian beam.
About the Authors
G. V. Kulak
Mozyr State Pedagogical University named after I. P. Shamyakin
Belarus
Belarus
G. V. Krokh
Mozyr State Pedagogical University named after I. P. Shamyakin
Belarus
Belarus
T. V. Nikolaenko
Mozyr State Pedagogical University named after I. P. Shamyakin
Belarus
Belarus
P. I. Ropot
B. I. Stepanov Institute of Physics of the National Academy of Sciences of Belarus, Minsk
Belarus
Belarus
O. V. Shakin
Saint-Petersburg State University of Aerospace Instrumentation
Russian Federation
Russian Federation
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