Highly efficient Yb3+-doped channel waveguide laser at 981 nm

D. Geskus, E.H. Bernhardi, K. van Dalfsen, S. Aravazhi, M. Pollnau

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    Channel waveguide lasers operating at 981 nm are demonstrated in KY1−x−yGdxLuy(WO4)2:Yb3+ waveguides grown by liquid phase epitaxy onto undoped KY(WO4)2 substrates and microstructured by Ar+ beam etching. Under pumping at 934 nm of samples with different waveguide geometry and outcoupling degree, a record-high slope efficiency of 76% versus absorbed pump power and a record-high output power of 650 mW for rare-earth-ion-doped microstructured channel waveguide lasers is achieved. The laser performance is compared to that of the same devices when pumping at 981 nm and lasing near 1025 nm.
    Original languageEnglish
    Pages (from-to)13773-13778
    Number of pages6
    JournalOptics express
    Issue number11
    Publication statusPublished - Jun 2013


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


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