O. S. Sidelnikov, E. V. Podivilov, S. A. Babin, S. Wabnitz, M. P. Fedoruk, “Numerical simulation of the beam self-cleaning process in a multimode graded-index fibre during propagation of a pump wave and a Stokes component”, Kvantovaya Elektronika, 2020, Volume 50, Number 12,Pages <nobr>1101

SELECTION OF PAPERS PRESENTED AT THE INTERNATIONAL WORKSHOP ON FIBRE LASERS (20-24 SEPTEMBER 2020, NOVOSIBIRSK)

Numerical simulation of the beam self-cleaning process in a multimode graded-index fibre during propagation of a pump wave and a Stokes component

O. S. Sidelnikov^a, E. V. Podivilov^ab, S. A. Babin^ab, S. Wabnitz^ac, M. P. Fedoruk^ad

^a Novosibirsk State University
^b Institute of Automation and Electrometry, Siberian Branch of Russian Academy of Sciences, Novosibirsk
^c Sapienza University of Rome, Italy
^d Institute of Computational Technologies, Siberian Branch of the Russian Academy of Sciences, Novosibirsk

Abstract: A model of coupled modes is proposed, which makes it possible to describe the propagation of a pump wave and a Stokes component in a multimode graded-index fibre. A decrease in the depression in the centre of the profile of the pump wave intensity distribution as a result of the influence of Kerr effects and random linear coupling of modes is demonstrated.

Keywords: multimode optical fibre, nonlinear effects, numerical simulation, stimulated Raman scattering.

Received: 09.10.2020