Measurement of nonequilibrium vortex propagation dynamics in a nonlinear medium

We observe and measure the nonequilibrium dynamics of optical vortices as a function of propagation distance through a nonlinear medium. The precession of a tilted-core vortex is quantified as is vortex core sharpening, where the infinite width of a linear core subsequently shrinks and approaches th...

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Bibliographic Details
Published in:Physics of fluids (1994) 2024-03, Vol.36 (3)
Main Authors: Ford, Patrick C., Voitiv, Andrew A., Zhu, Chuanzhou, Lusk, Mark T., Siemens, Mark E.
Format: Article
Language:English
Subjects:
Nonlinear dynamics
Nonlinear optics
Vortices
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Summary:We observe and measure the nonequilibrium dynamics of optical vortices as a function of propagation distance through a nonlinear medium. The precession of a tilted-core vortex is quantified as is vortex core sharpening, where the infinite width of a linear core subsequently shrinks and approaches the healing length of this nonlinear optical fluid. Experiments are performed with a variable-length nonlinear medium: a nonlinear fluid in a tank with an output window on a translating tube. This provides control over the distance the light propagates in the fluid and allows for the measurement of the dynamics throughout the propagation range. Results are compared with the predictions of a computational simulator to find the equivalent dimensionless nonlinear coefficient.
ISSN:1070-6631
1089-7666
DOI:10.1063/5.0195028