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  • Title: 75 W 40% efficiency single-mode all-fiber erbium-doped laser cladding pumped at 976 nm.
    Author: Kotov LV, Likhachev ME, Bubnov MM, Medvedkov OI, Yashkov MV, Guryanov AN, Lhermite J, Février S, Cormier E.
    Journal: Opt Lett; 2013 Jul 01; 38(13):2230-2. PubMed ID: 23811886.
    Abstract:
    Optimization of Yb-free Er-doped fiber for lasers and amplifiers cladding pumped at 976 nm was performed in this Letter. The single-mode fiber design includes an increased core diameter of 34 μm and properly chosen erbium and co-dopant concentrations. We demonstrate an all-fiber high power laser and power amplifier based on this fiber with the record slope efficiency of 40%. To the best of our knowledge, the achieved output power of 75 W is the highest power reported for such lasers.
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