Abstract

We propagate two coherent and parallel beams of a He–Ne laser through a Bi12TiO20 photorefractive crystal in the presence of drift nonlinearity. Our experimental results demonstrate that the beams attract or repel each other according to their initial phase difference. They attract each other when they are initially in phase and they repel each other when they are initially out of phase. These experimental results agree with numerical predictions recently published.

© 1997 Optical Society of America

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