A 1.5-W frequency doubled semiconductor disk laser tunable over 40 nm at around 745 nm

Esa J. Saarinen, Jari Lyytikäinen, Sanna Ranta, Antti Rantamäki, Antti Saarela, Alexei Sirbu, Vladimir Iakovlev, Eli Kapon, Oleg G. Okhotnikov

    Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

    2 Citations (Scopus)


    1.5 W of output power was obtained in the challenging wavelength range between 700 and 800 nm by frequency doubling a wafer-fused 1.49-μm semiconductor disk laser pumped with 980-nm diodes. A bismuth borate crystal was used for doubling the frequency. A total optical-to-optical efficiency of 8.3 % was achieved. The laser was tunable from 720 to 764 nm with an intracavity birefringent plate. The beam quality parameter M2 remained below 1.5 at all power levels. The laser is attractive for biomedical applications such as photodynamic therapy that benefit from the low absorption of light in tissue in this spectral range.
    Original languageEnglish
    Title of host publicationProceedings of SPIE
    Subtitle of host publicationVertical External Cavity Surface Emitting Lasers (VECSELs) VI
    Number of pages8
    Publication statusPublished - 2016
    Publication typeA4 Article in conference proceedings
    EventSPIE Photonics West -
    Duration: 1 Jan 1900 → …

    Publication series

    NameSpie conference proceedings
    ISSN (Electronic)0277-786X


    ConferenceSPIE Photonics West
    Period1/01/00 → …

    Publication forum classification

    • Publication forum level 0


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