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67 W of Output Power From an Yb-Free Er-Doped Fiber Amplifier Cladding Pumped at 976 nm

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  • 67 W of Output Power From an Yb-Free Er-Doped Fiber Amplifier Cladding Pumped at 976 nm
V. Kuhn, D. Kracht, J. Neumann, P. Weßels
67 W of Output Power From an Yb-Free Er-Doped Fiber Amplifier Cladding Pumped at 976 nm
IEEE Photonics Technology Letters 7 (23), 432–434 (2011)
Publication type: Journal Article (reviewed)
DOI: 10.1109/LPT.2011.2107735

Abstract

We report on an Yb-free Er-doped single frequency large mode area (LMA) fiber amplifier cladding pumped at 976 nm. Using a commercial 40/140-µm Er-doped double-clad fiber, output power levels of more than 67 W could be obtained. To the best of our knowledge, we demonstrate the power scalability of Yb-free Er-doped fiber amplifiers to output powers of multiple 10 W for the first time. The obtained output power is also the highest value ever reported for an Yb-free Er-doped fiber laser system pumped around 980 nm.

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