TY - JOUR

T1 - Spatial beam self-cleaning in multimode fibres

AU - Krupa, K.

AU - Tonello, A.

AU - Shalaby, B. M.

AU - Fabert, M.

AU - Barthélémy, A.

AU - Millot, G.

AU - Wabnitz, S.

AU - Couderc, V.

N1 - K.K., A.T., B.M.S., M.F., A.B. and V.C. acknowledge the financial support provided by Bpifrance OSEO (Industrial Strategic Innovation Programme) and Horiba Medical (Dat@diag no. I1112018W), by Region Limousin (C409-SPARC) and ANR Labex SIGMA-LIM. S.W. acknowledges support by the Italian Ministry of University and Research (MIUR) (grants 2012BFNWZ2 and 2015KEZNYM), the European Community via the Horizon 2020 CARDIALLY project and the Ministry of Education and Science of the Russian Federation (14.Y26.31.0017). G.M. acknowledges support from the iXcore research foundation, Photcom Region Bourgogne and ANR Labex Action. The authors thank F. Wise, L. Wright, Z. Liu and A. Picozzi for valuable discussions.

PY - 2017/4/1

Y1 - 2017/4/1

N2 - Multimode optical fibres are enjoying renewed attention, boosted by the urgent need to overcome the current capacity crunch of single-mode fibre (SMF) systems and by recent advances in multimode complex nonlinear optics. In this work, we demonstrate that standard multimode fibres (MMFs) can be used as ultrafast all-optical tools for the transverse beam manipulation of high-power laser pulses. Our experimental data show that the Kerr effect in a graded-index (GRIN) MMF is the driving mechanism that overcomes speckle distortions, and leads to a counterintuitive effect that results in a spatially clean output beam robust against fibre bending. Our observations demonstrate that nonlinear beam reshaping into the fundamental mode of a MMF can be achieved even in the absence of a dissipative process such as stimulated scattering (Raman or Brillouin).

AB - Multimode optical fibres are enjoying renewed attention, boosted by the urgent need to overcome the current capacity crunch of single-mode fibre (SMF) systems and by recent advances in multimode complex nonlinear optics. In this work, we demonstrate that standard multimode fibres (MMFs) can be used as ultrafast all-optical tools for the transverse beam manipulation of high-power laser pulses. Our experimental data show that the Kerr effect in a graded-index (GRIN) MMF is the driving mechanism that overcomes speckle distortions, and leads to a counterintuitive effect that results in a spatially clean output beam robust against fibre bending. Our observations demonstrate that nonlinear beam reshaping into the fundamental mode of a MMF can be achieved even in the absence of a dissipative process such as stimulated scattering (Raman or Brillouin).

KW - OPTICAL-FIBER

KW - SUPERCONTINUUM GENERATION

KW - INSTABILITY

KW - DYNAMICS

KW - SOLITONS

UR - http://www.scopus.com/inward/record.url?scp=85015045066&partnerID=8YFLogxK

U2 - 10.1038/nphoton.2017.32

DO - 10.1038/nphoton.2017.32

M3 - Article

AN - SCOPUS:85015045066

VL - 11

SP - 237

EP - 241

JO - Nature Photonics

JF - Nature Photonics

SN - 1749-4885

IS - 4

ER -