V. L. Kotov, M.E. Likhachev, Mikhail M. Bubnov, O. I. Medvedkov, M.V. yashkov, et al.. Single-mode Yb-free Er-doped all-fiber laser cladding-pumped at 976 nm with record efficiency of 40 % and output power of 75W.
Conference on Lasers and Electrooptics / Europe - IQEC (CLEO Europe), 2013, Munich, Germany. paper CJ8.2.
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