Thermalization of Orbital Angular Momentum Beams in Multimode Optical Fibers

• DOI: 10.1103/physrevlett.128.243901
• Publication Date: 2022-06-17T15:13:20Z
• Authors: E. V. Podivilov; F. Mangini; O. S. Sidelnikov; M. Ferraro; M. Gervaziev; D. S. Kharenko; M. Zitelli; M. P. Fedoruk; S. A. Babin; S. Wabnitz
• Keywords: Thermalisation; Momentum (technical analysis)

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 asymptotic mode composition is obtained, based conservation momentum. confirm our predictions numerical simulations and experiments holographic decomposition beams. Our work establishes new constraints for achievement spatial beam self-cleaning, giving previously unforeseen insights into underlying physical mechanisms.