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Highly efficient few-mode spatial beam self-cleaning at 1.5µm

2020; Optica Publishing Group; Volume: 28; Issue: 10 Linguagem: Inglês

10.1364/oe.392081

1094-4087

Yann Leventoux, Alexandre Parriaux, Oleg Sidelnikov, G. Granger, Mathieu Jossent, Laure Lavoute, Dmitry Gaponov, Marc Fabert, Alessandro Tonello, Katarzyna Krupa, Agnès Desfarges‐Berthelemot, Vincent Kermène, G. Millot, Sébastien Février, S. Wabnitz, Vincent Couderc,

Optical Network Technologies

We experimentally demonstrate that spatial beam self-cleaning can be highly efficient when obtained with a few-mode excitation in graded-index multimode optical fibers. By using 160 ps long, highly chirped (6 nm bandwidth at -3dB) optical pulses at 1562 nm, we demonstrate a one-decade reduction of the power threshold for spatial beam self-cleaning, with respect to previous experiments using pulses with laser wavelengths at 1030-1064 nm. Self-cleaned beams remain spatio-temporally stable for more than a decade of their peak power variation. The impact of input pulse temporal duration is also studied.