Kerr self-cleaning of pulsed beam in an ytterbium doped multimode fiber

Year: 2017

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.

Autors Affiliation: Univ Limoges, XLIM, UMR CNRS 7252, 123 Ave A Thomas, F-87060 Limoges, France; Univ Bourgogne Franche Comte, ICB, UMR CNRS 6303, 9 Av A Savary, F-21078 Dijon, France; Univ Brescia, Dipartimento Ingn Informaz, Via Branze 38, I-25123 Brescia, Italy; INO CNR, Via Branze 38, I-25123 Brescia, Italy; Novosibirsk State Univ, 1 Pirogova Str, Novosibirsk 630090, Russia.

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.

Journal/Review: OPTICS EXPRESS

Volume: 25 (5)      Pages from: 4783  to: 4792

More Information: V.C, A.T, A.B., R.G acknowledge financial support from Horiba Medical and BPI-France in the frame of the Dat@diag project (Industrial Strategic Innovation Program); S.W. acknowledges support by the Italian Ministry of University and Research (MIUR) (grants 2012BFNWZ2 and 2015KEZNYM), the Horizon 2020 MSCA-RISE 2015 project CARDIALLY, and the Russian Ministry of Science and Education grant 14.Y26.31.0017; G.M acknowledges support by IXCORE Research Foundation and the French National Research Agency (ANR) Labex ACTION. The authors thank Thales Research and Technology for providing the MM Yb-doped fiber.
KeyWords: Cleaning; Fibers; Optical fibers; Refractive index; Ytterbium, Double-clad; Laser gain; Multimode optical fibers; Pulsed beams; Refractive index profiles; Self cleaning; Single mode emission; Ytterbium-doped, Multimode fibers
DOI: 10.1364/OE.25.004783

Citations: 73
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