Regularities of wavefront conjugation in contradirectional four-wave mixing by mixed holographic gratings in Bi₁₂SiO₂₀ crystal of (001), (110) and (111) cuts have been considered. Dependences of the reflection coefficient optimized with respect to the crystal orientation angle and azimuth of linear polarization of the light beams on the recording medium thickness have been investigated. It has been shown that the maximum intensity of the phase-conjugated light beam is achievable for the crystal sample of (110) cut. Combinations of the crystal thickness and orientation angle, as well as of the light beam polarization azimuths, at which the highest diffraction efficiency gets achieved have been determined. Keywords: wavefront conjugation, reflection coefficient, photorefractive crystal, light beam.

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Дата начала обработки статистических данных - 27 января 2016 г.