Scientific Results

Nonlinear beam self-cleaning in a coupled cavity composite laser based on 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: Université de Limoges, XLIM, UMR CNRS 7252, 123 Avenue A. Thomas, Limoges, 87060, France; Université de Bourgogne Franche-Comté, ICB, UMR CNRS 6303, 9 Av. A. Savary, Dijon, 21078, France; Dipartimento di Ingegneria dell’Informazione, Università di Brescia, INO-CNR, via Branze 38, Brescia, 25123, Italy; Novosibirsk State University, 1 Pirogova str., Novosibirsk, 630090, Russian Federation

Abstract: 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.

Journal/Review: OPTICS EXPRESS

Volume: 25 (19)      Pages from: 22219  to: 22227

More Information: Ministero dell’Istruzione, dell’Università e della Ricerca, MIUR, PRIN 2015KEZNYM. Ministry of Education and Science of the Russian Federation, Minobrnauka, Y26.31.0017. Conseil Régional du Limousin, C409 SPARC. Horizon 2020, 691051. Ministero dell’Istruzione, dell’Università e della Ricerca, MIUR. – Horiba Medical and BPI-France in the frame of the Dat@diag project (Industrial Strategic Innovation Program); Région Limousin (C409 SPARC); Italian Ministry of University and Research (MIUR) (Ministero dell’Istruzione, dell’Università e della Ricerca (MIUR) (PRIN 2015KEZNYM); Ministry of Education and Science of the Russian Federation (Minobrnauka) (14.Y26.31.0017); European Union’s Horizon 2020 research and innovation programme under the Marie Sklodowska-Curie grant agreement No 691051.
KeyWords: Cleaning; Fibers; Multimode fibers; Q switching, Coupled cavity; Coupled-cavity lasers; Laser pulse duration; Nd:YAG microchip lasers; Non-linear beams; Nonlinear frequency conversion; Passively Q-switched; Single-mode lasers, Neodymium lasers
DOI: 10.1364/OE.25.022219

Citations: 24
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