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Nonlinear All-optical Vortex Switch in Optically Induced Two-dimensional Waveguide Arrays

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We present all-optical switching of the topological charge of a discrete vortex in a nonlinear four-waveguide structure optically induced in photorefractive media. The flip of the vorticity is fully controllable by the vortex beam power.

© 2014 Optical Society of America

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