Hydrodynamic 2D turbulence and spatial beam condensation in multimode optical fibers
01 Pubblicazione su rivista
Podivilov E. V., Kharenko D. S., Gonta V. A., Krupa K., Sidelnikov O. S., Turitsyn S., Fedoruk M. P., Babin S. A., Wabnitz S.
ISSN: 0031-9007
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 an analogue to wave condensation that is well known in hydrodynamic 2D turbulence.