Three-transition cascade erbium laser at 1.7, 2.7, and 1.6 µm

Markus Pollnau, C. Ghisler, W. Lüthy, H.P. Weber, J. Schneider, U.B. Unrau

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    We report on an upconversion cascade laser in an erbium-doped ZBLAN fiber emitting simultaneously on the three transitions 4S3/2 -> 4I9/2 at 1.7 um, 4I11/2 -> 4I13/2 at 2.7 um, and 4I13/2 -> 4I15/2 at 1.6 um. At moderate pump powers, the laser transition at 1.6 um supports 2.7-um lasing and permits a slope efficiency at 2.7 um of 15% versus launched pump power. Above the threshold of upconversion lasing at 1.7 um, the slope efficiency at 2.7 um increases to 25.4%. Taking pump excited-state absorption into account, this value represents more than 90% of the theoretical slope efficiency. A transversely single-mode output power of 99 mW is achieved at 2.7 um.
    Original languageUndefined
    Article number10.1364/OL.22.000612
    Pages (from-to)612-614
    Number of pages3
    JournalOptics letters
    Issue number9
    Publication statusPublished - 1997


    • IOMS-APD: Active Photonic Devices
    • IR-70107
    • EWI-17573

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