Abstract

We employ Bragg diffraction of an ordinary probe beam into an extraordinary beam in a four-wave mixing geometry and measure the c axis of a BaTiO₃ crystal with respect to a surface normal of the crystal. We measure the c axis by rotating the crystal relative to the photorefractive grating formed inside the crystal and by minimizing the anisotropic Bragg diffraction. Our measurement shows that the c axis of our BaTiO₃ crystal is rotated by 0.29° ± 0.14° in one direction and by 0.35° ± 0.14° in the other direction with respect to the normal to the crystal surface toward which the $+c$ axis is pointing.

© 1996 Optical Society of America

Anisotropic scattering in photorefractive crystals

Doyle A. Temple and Cardinal Warde
J. Opt. Soc. Am. B 3(2) 337-341 (1986)

Coupling of orthogonally polarized eigenwaves in BaTiO₃ by light-induced parametric scattering

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Coupling of ordinary and extraordinary waves in iron-doped BaTiO₃ by a grating recorded by spatially oscillating photovoltaic currents

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J. Opt. Soc. Am. B 13(11) 2615-2621 (1996)

High-order anisotropic diffraction in photorefractive crystals

D. A. Temple and C. Warde
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