Abstract
The possibility of formation of a 2D optical image contour during double Bragg’s diffraction simultaneously in two Bragg’s orders is investigated. Transfer functions of Bragg’s orders of double diffraction are obtained with account for ellipticity of optical beams and the curvature of wave surfaces of the crystal. The conditions for obtaining the image contour simultaneously in the zeroth and plus second Bragg’s orders are determined. This is confirmed experimentally using the example of Fourier processing of the image transferred by radiation at a wavelength of 0.63 μm. Double Bragg’s diffraction is realized based on an acousto-optic cell made of a uniaxial gyrotropic paratellurite crystal, which operates at an acoustic frequency of 20.3 MHz.
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This study was supported by the Russian Science Foundation (project no. 22-21-00059).
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Translated by N. Wadhwa
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Kotov, V.M., Averin, S.V., Zenkina, A.A. et al. Formation of 2D Image Contours in the Zeroth and Plus Second Diffraction Orders during Double Bragg’s Diffraction. Bull. Lebedev Phys. Inst. 49 (Suppl 1), S89–S95 (2022). https://doi.org/10.3103/S1068335622130036
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DOI: https://doi.org/10.3103/S1068335622130036