We report on the thermalization of light carrying orbital angular momentum in multimode optical fibers, induced by nonlinear intermodal interactions. A generalized Rayleigh-Jeans distribution of asymptotic mode composition is obtained, based on the conservation of the angular momentum. We confirm our predictions by numerical simulations and experiments based on holographic mode decomposition of multimode beams. Our work establishes new constraints for the achievement of spatial beam self-cleaning, giving previously unforeseen insights into the underlying physical mechanisms.

Thermalization of orbital angular momentum beams in multimode optical fibers / Podivilov, E.  V.; Mangini, F.; Sidelnikov, O.  S.; Ferraro, M.; Gervaziev, M.; Kharenko, D.  S.; Zitelli, M.; Fedoruk, M.  P.; Babin, S.  A.; Wabnitz, S.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 128:24(2022), pp. 1-6. [10.1103/PhysRevLett.128.243901]

Thermalization of orbital angular momentum beams in multimode optical fibers

Mangini, F.;Ferraro, M.;Zitelli, M.;Wabnitz, S.
2022

Abstract

We report on the thermalization of light carrying orbital angular momentum in multimode optical fibers, induced by nonlinear intermodal interactions. A generalized Rayleigh-Jeans distribution of asymptotic mode composition is obtained, based on the conservation of the angular momentum. We confirm our predictions by numerical simulations and experiments based on holographic mode decomposition of multimode beams. Our work establishes new constraints for the achievement of spatial beam self-cleaning, giving previously unforeseen insights into the underlying physical mechanisms.
2022
optical fibers; nonlinear optics; optical solitons; Kerr effect
01 Pubblicazione su rivista::01a Articolo in rivista
Thermalization of orbital angular momentum beams in multimode optical fibers / Podivilov, E.  V.; Mangini, F.; Sidelnikov, O.  S.; Ferraro, M.; Gervaziev, M.; Kharenko, D.  S.; Zitelli, M.; Fedoruk, M.  P.; Babin, S.  A.; Wabnitz, S.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 128:24(2022), pp. 1-6. [10.1103/PhysRevLett.128.243901]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1648163
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