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- Title
Degenerate Four-Wave Mixing by Transmission Holographic Gratings in a Bi<sub>12</sub>TiO<sub>20</sub> Crystal of the (110)-Cut.
- Authors
Naunyka, V. N.; Nichiporko, S. F.; Makarevich, A. V.; Shandarov, S. M.
- Abstract
The regularities of stationary degenerate four-wave mixing by transmission holographic gratings formed in a Bi12TiO20 crystal of (110)-cut are analyzed. A system of differential equations, which can be used to find the components of the vector amplitudes of linearly polarized light waves with four-wave mixing by phase and phase–amplitude holographic gratings, is obtained. Linear electrooptical, photoelastic, and inverse piezoelectric effects, as well as natural optical activity, circular dichroism, and crystal absorption, are taken into account in the theoretical model. The values of the orientation angle and the crystal thickness at which the reflection coefficient can be maximized are found. It is found experimentally that the reflection coefficient in the Bi12TiO20 crystal of the (110)-cut with a thickness of 7.7 mm can reach 2.4 with an optimal choice of the orientation angle. It is shown that the theoretical calculations and experimental data are in best agreement when the phase–amplitude structure of the transmission holographic gratings formed in the Bi12TiO20 crystal is taken into account in the mathematical model of diffraction.
- Subjects
FOUR-wave mixing; HOLOGRAPHIC gratings; CIRCULAR dichroism; PIEZOELECTRICITY; CRYSTALS; REFLECTANCE; OPTICAL rotation
- Publication
Technical Physics, 2021, Vol 66, Issue 6, p760
- ISSN
1063-7842
- Publication type
Article
- DOI
10.1134/S1063784221050169