Spatial coherence singularities and incoherent vortex solitons
Date
2004-10-24
Authors
Motzek, Kristian
Shih, Ming-Feng
Swartzlander Jr, Grover A.
Kivshar, Yuri
Journal Title
Journal ISSN
Volume Title
Publisher
Optical Society of America
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.
Description
Keywords
Keywords: Computer simulation; Crystals; Light propagation; Mathematical models; Nonlinear equations; Photorefractive materials; Solitons; Optical vortices; Photorefractive crystal; Spatial coherence; Coherent light
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Source
Journal of the Optical Society of America B
Type
Journal article