Microstructured KY(WO4)2:Gd3+, Lu3+, Yb3+ channel waveguide laser

D. Geskus, S. Aravazhi, C. Grivas, K. Wörhoff, M. Pollnau

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    Abstract

    Epitaxially grown, 2.4-μm-thin layers of KY(WO4)2:Gd3+, Lu3+, Yb3+, which exhibit a high refractive index contrast with respect to the undoped KY(WO4)2 substrate, have been microstructured by Ar beam milling, providing 1.4-μm-deep ridge channel waveguides of 2 to 7 μm width, and overgrown by an undoped KY(WO4)2 layer. Channel waveguide laser operation was achieved with a launched pump power threshold of only 5 mW, a slope efficiency of 62% versus launched pump power, and 76 mW output power.
    Original languageEnglish
    Pages (from-to)8853-8858
    Number of pages6
    JournalOptics express
    Volume18
    Issue number8
    DOIs
    Publication statusPublished - Apr 2010

    Keywords

    • IOMS-APD: Active Photonic Devices
    • Ytterbium
    • Waveguides
    • Channeled
    • Lasers

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