6533b7d0fe1ef96bd125b8f7
RESEARCH PRODUCT
Nonlinear beam self-cleaning in a coupled cavity composite laser based on multimode fiber
R. GuenardAlain BarthélémyAgnès Desfarges-berthelemotGuy MillotStefan WabnitzKatarzyna KrupaMarc FabertAlessandro TonelloVincent CoudercJean-louis AugusteR. DupiolAbdelkrim BendahmaneVincent Kermènesubject
cleaning; fibers; multimode fibersMaterials sciencePhysics::OpticscleaningPolarization-maintaining optical fiberfibers01 natural sciencesGraded-index fiberlaw.inventionmultimode fibers010309 opticsOpticslawFiber laser0103 physical sciencesLaser power scaling010306 general physics[PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics]Distributed feedback laser[ PHYS.PHYS.PHYS-OPTICS ] Physics [physics]/Physics [physics]/Optics [physics.optics]Multi-mode optical fiberbusiness.industryLaserAtomic and Molecular Physics and OpticsPhysics::Accelerator PhysicsLaser beam qualitybusinessdescription
International audience; We study a coupled cavity laser configuration where a passively Q-switched Nd:YAG microchip laser is combined with an extended cavity, including a doped multimode fiber. For appropriate coupling levels with the extended cavity, we observed that beam self-cleaning was induced in the multimode fiber thanks to nonlinear modal coupling, leading to a quasi-single mode laser output. In the regime of beam self-cleaning, laser pulse duration was reduced from 525 to 225 ps. We also observed a Q-switched mode-locked operation, where spatial self-cleaning was accompanied by far-detuned nonlinear frequency conversion in the active multimode fiber.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2017-01-01 |