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

Yann Leventoux (1) , A. Parriaux (2) , O. Sidelnikov , Geoffroy Granger (1) , Mathieu Jossent , Laure Lavoute , D Gaponov , Fabert Marc (1) , Alessandro Tonello (1) , ‪katarzyna Krupa , Agnès Desfarges-Berthelemot (1) , Vincent Kermène (1) , Guy Millot (2) , Sébastien Février (1) , Wabnitz Stefan , V Couderc (1)

1 XLIM - XLIM
2 ICB - Laboratoire Interdisciplinaire Carnot de Bourgogne

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.

Domaines: Optique / photonique

Yann Leventoux, A. Parriaux, O. Sidelnikov, Geoffroy Granger, Mathieu Jossent, et al.. Highly efficient few-mode spatial beam self-cleaning at 1.5μm. Optics Express, 2020, 28 (10), pp.14333-14344. ⟨10.1364/OE.392081⟩. ⟨hal-03426175⟩