Hydrodynamic 2D turbulence and spatial beam condensation in multimode optical fibers
arXiv:1811.10239 · doi:10.1103/PhysRevLett.122.103902
Abstract
We show that Kerr beam self-cleaning results from parametric mode mixing instabilities, that generate a number of nonlinearly interacting modes with randomized phases -- optical wave turbulence, followed by a direct and inverse cascade towards high mode numbers and condensation into the fundamental mode, respectively. This optical self-organization effect is analogue to wave condensation that is well-known in hydrodynamic 2D turbulence.
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