High power two-micron fibre lasers

William A. Clarkson, A. Abdolvand, D. Y. Shen, R. A. Hayward, L. J. Cooper, R. B. Williams, J. Nilsson

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    1 Citation (Scopus)

    Abstract

    A double-clad thulium-doped silica fibre laser, pumped by two beam-shaped diode-bars operating at 787-790nm, has yielded 14W of single-mode output at similar to2mum, with a slope efficiency with respect to launched power of 46%. Using a tunable laser configuration, comprising an external cavity with a diffraction grating, a maximum output power of 10.5W at 1921nm has been obtained, and wavelength tuning at multi-watt power levels over 215nm from 1855 to 2070nm has been demonstrated. The prospects for further improvement in performance will be discussed. In addition, a simple approach for further scaling of power levels from fibre lasers in the two-micron regime, based on intracavity wavelength combining of multiple fibre lasers is described. In a preliminary demonstration, four cladding-pumped thulium-doped silica fibre lasers are wavelength-combined yielding an output power >14W. The prospects for further increase in output power via this approach will be discussed.

    Original languageEnglish
    Title of host publicationXIV International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers
    EditorsKrzysztof M. Abramski, Edward F. Plinski, Wieslaw Wolinski
    Place of PublicationBellingham
    PublisherSPIE-International Society for Optical Engineering
    Pages482-489
    Number of pages8
    ISBN (Print)0819449806
    DOIs
    Publication statusPublished - 2003
    EventXIV International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers - Wroclaw, Poland
    Duration: 25 Aug 200230 Aug 2002

    Publication series

    NameProceedings of SPIE
    PublisherSPIE
    Volume5120

    Conference

    ConferenceXIV International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers
    CountryPoland
    CityWroclaw
    Period25/08/0230/08/02

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