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.
Hydrodynamic 2D turbulence and spatial beam condensation in multimode optical fibers / Podivilov, E. V.; Kharenko, D. S.; Gonta, V. A.; Krupa, K.; Sidelnikov, O. S.; Turitsyn, S.; Fedoruk, M. P.; Babin, S. A.; Wabnitz, S.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 122:10(2019). [10.1103/PhysRevLett.122.103902]
Hydrodynamic 2D turbulence and spatial beam condensation in multimode optical fibers
Wabnitz, S.
2019
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 an analogue to wave condensation that is well known in hydrodynamic 2D turbulence.| File | Dimensione | Formato | |
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