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.

Original languageEnglish
Article number243901
JournalPhysical Review Letters
Volume128
Issue number24
DOIs
Publication statusPublished - 17 Jun 2022

OECD FOS+WOS

  • 1.03 PHYSICAL SCIENCES AND ASTRONOMY

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