Journal
OPTICS EXPRESS
Volume 25, Issue 19, Pages 22219-22227Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.25.022219
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Funding
- Horiba Medical and BPI-France in the frame of the Dat@ diag project (Industrial Strategic Innovation Program)
- Region Limousin [C409 SPARC]
- Italian Ministry of University and Research (MIUR) (Ministero dell'Istruzione, dell'Universita 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 [691051]
- Marie Curie Actions (MSCA) [691051] Funding Source: Marie Curie Actions (MSCA)
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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. (C) 2017 Optical Society of America
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