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Spatial coherence singularities and incoherent vortex solitons

Kristian Motzek·Yuri S. Kivshar·Ming-Feng Shih·Grover A. Swartzlander Jr
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Abstract

We study spatially localized optical vortices created by self-trapping of partially incoherent light with a phase dislocation in a biased photorefractive crystal. In a contrast to the decay of coherent self-trapped vortex beams due to the azimuthal instability, the incoherent vortices are stabilized when the spatial incoherence of light exceeds a certain threshold. We analyze the spatial coherence properties of the incoherent optical vortices and reveal the existence of ring-like singularities in the spatial coherence function of a vortex field that can characterize the stable propagation of vortices through nonlinear media.

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Kristian Motzek, Yuri S. Kivshar, Ming-Feng Shih, Grover A. Swartzlander Jr. 2004-10-24. Spatial coherence singularities and incoherent vortex solitons. https://doi.org/10.1364/josab.22.001437

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