Work

Spatial beam self-cleaning: from non-equilibrium to thermalization of nonlinear multimode fiber modes

Year: 2025

Type: conference-paper

Abstract: We present a direct experimental demonstration that spatial beam self-cleaning in nonlinear multimode graded-index optical fibers arises from the nonequilibrium evolution of the mode population toward a state of thermal equilibrium. This process is shown to be a result of the maximization of the optical entropy of the modal distribution. Entropy maximization is observed both when the input beam power is increased with a fixed length of fiber, and when the fiber length grows larger while keeping the input beam power constant.

DOI: 10.1117/12.3048505

Authors: Fabio Mangini, Mario Ferraro, Wasyhun Gemechu, Yifan Sun, Mikhail Gervaziev, Denis Kharenko, Sergey Babin, Vincent Couderc, Stefan Wabnitz

Language: English

Topic: Photonic Crystal and Fiber Optics

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: green

Funders: Agence Nationale de la Recherche, Russian Science Foundation

Awards: G1333922411, G3455407915, G3645878137, G4656594441, G7240651115, From specific ceramic materials and components to integrated, secured and intelligent communication systems

OpenAlex ID: W4408613272

FWCI:

Cites: 12

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Related to: 10