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The photorefractive effect in BaTiO3 has been the subject of extensive research in recent years. Because of very large electro-optic coefficients, BaTiO3 has become a unique candidate for a variety of nonlinear optical devices which operate at very low light intensities. Most of these devices use energy transfer between coherent optical beams that interfere inside the crystal while some devices use the extinction of a single beam through beam fanning1-3.
© 1991 Optical Society of America
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