Thulium channel waveguide laser in a monoclinic double tungstate with 70% slope efficiency

Koop van Dalfsen, S. Aravazhi, C. Grivas, Sonia Maria García Blanco, Markus Pollnau

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    Laser experiments were performed on buried, ridge-type channel waveguides in an 8 at. % thulium-doped, yttrium-gadolinium-lutetium codoped monoclinic double tungstate. A maximum slope efficiency of 70% and output powers up to 300 mW about 2.0 μm were obtained in a mirrorless laser resonator, by pumping with a Ti:sapphire laser near 800 nm. To the best of our knowledge, this result represents the most efficient 2 μm channel waveguide laser to date. Lasing is obtained at various wavelengths between 1810 nm and 2037 nm.
    Original languageUndefined
    Pages (from-to)887-889
    Number of pages3
    JournalOptics letters
    Issue number5
    Publication statusPublished - 1 Mar 2012


    • IOMS-APD: Active Photonic Devices
    • Waveguides
    • Thin film devices and applications
    • channeled
    • IR-79800
    • Infrared and far-infrared lasers
    • Integrated optics materials
    • METIS-285158
    • EWI-21604

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