We report a new Yb-doped gain fiber with 20 µm core and 400 µm cladding, designed for improving the long-term operation of commercial fiber lasers powered by cost-effective pump diodes, centered near 976 nm wavelength. The fiber was tested in a co-pumped amplifier, reaching 3.8 kW signal power with 89% optical-to-optical efficiency. Negligible photodarkening loss was observed in over 200-hour laser operation at 2 kW. The signal power was limited to 3.8 kW by TMI and can be further increased by optimizing the pumping configuration. The fiber is compatible with available 20/400 commercial fibers and components allowing fast system integration.


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    Titel :

    Photodarkening-free fiber laser based on Yb-doped 20/400 gain fiber


    Beteiligte:
    Rosales-Garcia, A. (Autor:in) / Jensen, R. (Autor:in) / Ovtar, S. (Autor:in) / Ingerslev, K. (Autor:in) / Edvold, B. (Autor:in) / Kristensen, P. (Autor:in) / Nicholson, J. W. (Autor:in) / DiGiovanni, D. J. (Autor:in) / Pálsdóttir, B. (Autor:in)

    Kongress:

    Fiber Lasers XIX: Technology and Systems ; 2022 ; San Francisco,California,United States


    Erschienen in:

    Proc. SPIE ; 11981


    Erscheinungsdatum :

    2022-03-04





    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch



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