多模光纤中轨道角动量光束的热平衡

Thermalization of Orbital Angular Momentum Beams in Multimode Optical Fibers.

作者信息

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

机构信息

Novosibirsk State University, Novosibirsk 630090, Russia.

Institute of Automation and Electrometry SB RAS, 1 academician Koptyug avenue, Novosibirsk 630090, Russia.

出版信息

Phys Rev Lett. 2022 Jun 17;128(24):243901. doi: 10.1103/PhysRevLett.128.243901.

DOI:10.1103/PhysRevLett.128.243901

PMID:35776459

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.

摘要

我们报道了由非线性模式间相互作用引起的多模光纤中携带轨道角动量的光的热化现象。基于角动量守恒，获得了渐近模式组成的广义瑞利 - 金斯分布。我们通过基于多模光束全息模式分解的数值模拟和实验证实了我们的预测。我们的工作为实现空间光束自清洁建立了新的约束条件，对潜在的物理机制给出了前所未有的见解。