6533b863fe1ef96bd12c77c2
RESEARCH PRODUCT
Adaptive Kerr-Assisted Transverse Mode Selection in Multimode Fibers
Stefan WabnitzKatarzyna KrupaGuy MillotMarc FabertAgnès Desfarges-berthelemotAlessandro TonelloDaniele ModottoEtienne DeliancourtVincent CoudercVincent KermèneAlain Barthélémysubject
PhysicsWavefrontMulti-mode optical fiberOptical fiberSpatial light modulatorbusiness.industryPhysics::Optics02 engineering and technology021001 nanoscience & nanotechnologyKerr effect; multimode fibers; transverse effects01 natural sciencesTransverse modelaw.inventionmultimode fibers010309 opticsNonlinear systemOpticsKerr effectlaw0103 physical sciencestransverse effects0210 nano-technologyAdaptive opticsbusinessBeam (structure)description
Multimode optical fibers (MMFs) have recently regained interest because of the degrees of freedom associated with their different eigenmodes. In the nonlinear propagation regime in particular, new phenomena have been unveiled in graded-index (GRIN) MMFs such as geometric parametric instabilities and Kerr beam self-cleaning [1, 2]. The speckled pattern observed at the output of the MMF at low powers, is transformed at high powers into a bell-shaped beam close to the fundamental mode. Recent work has also demonstrated that Kerr beam self-cleaning can lead to a low-order spatial mode, different from a bell-shape, by adjusting the laser beam in-coupling conditions [3]. An attractive way to systematically control the spatial excitation conditions at the fiber input is provided by the use of a spatial light modulator (SLM) which permits to profile the beam wavefront entering the MMF. In most cases, experiments involving adaptive optics consider linear propagation through scattering plates or MMFs [4]. So far, few works have dealt with the nonlinear propagation regime[5, 6].
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2019-06-01 |