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Kerr self-cleaning of pulsed beam in an ytterbium doped multimode fiber.
Title Kerr self-cleaning of pulsed beam in an ytterbium doped multimode fiber.
Authors Guenard, R.; Krupa, K.; Dupiol, R.; Fabert, M.; Bendahmane, A.; Kermene, V.; Desfarges-Berthelemot, A.; Auguste, J.L.; Tonello, A.; Barthélémy, A.; Millot, G.; Wabnitz, S.; Couderc, V.
Journal Opt Express
DOI 10.1364/OE.25.004783
Abstract

We experimentally demonstrate that Kerr spatial self-cleaning of a pulsed beam can be obtained in an amplifying multimode optical fiber. An input peak power of 500 W only was sufficient to produce a quasi-single-mode emission from the double-clad ytterbium doped multimode fiber (YMMF) with non-parabolic refractive index profile. We compare the self-cleaning behavior observed in the same fiber with loss and with gain. Laser gain introduces new opportunities to achieve spatial self-cleaning of light in multimode fibers at a relatively low power threshold.