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Active Optical Fibers and Components for Fiber Lasers Emitting in the 2-mu m Spectral Range

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    0537493 - ÚFE 2021 RIV CH eng J - Journal Article
    Todorov, Filip - Aubrecht, Jan - Peterka, Pavel - Schreiber, Ondřej - Jasim, Ali - Mrázek, Jan - Podrazký, Ondřej - Kamrádek, Michal - Kanagaraj, Nithyanandan - Grábner, Martin - Baravets, Yauhen - Cajzl, Jakub - Koška, Pavel - Fišar, A. - Kašík, Ivan - Honzátko, Pavel
    Active Optical Fibers and Components for Fiber Lasers Emitting in the 2-mu m Spectral Range.
    Materials. Roč. 13, č. 22 (2020), č. článku 5177. E-ISSN 1996-1944
    R&D Projects: GA TA ČR(CZ) TN01000008; GA ČR(CZ) GA19-03141S
    Institutional support: RVO:67985882
    Keywords : Bragg gratings * Fiber laser material processing * Fused fiber components * Mode-locked fiber lasers * Nanoparticle doping
    OECD category: Optics (including laser optics and quantum optics)
    Impact factor: 3.623, year: 2020
    Method of publishing: Open access

    Laser sources emitting in the infrared range at around 2 mu m are attracting great interest for a variety of applications like processing of transparent thermoplastic polymers in industry as well as plenty of applications in medicine, spectroscopy, gas sensing, nonlinear frequency conversion to the mid-infrared, to mention a few. Of late, fiber lasers compared to other kinds of lasers benefit from their all-fiber design, leading to a compact, robust, and well thermally manageable device. Particularly, thulium- and holmium-doped fiber lasers are the first choice in fiber lasers emitting light around 2 mu m. In this paper, we give an overview of our recent results in the research on thulium- and holmium-doped optical fibers, fiber lasers, and related research topics in the 2-mu m spectral range. In particular, we present, to our knowledge, the first results of improvement of pump absorption in double-clad fibers thanks to the fiber twist frozen during drawing. Finally, a brief demonstration of material processing by thulium all-fiber laser operating at 2 mu m is presented
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