Abstract
The scheme of tandem pumping has drawn a lot of interest in fiber laser field for their outstanding characteristics, which include high-brightness, low quantum defect, and great potential for power scaling. The 1018 nm laser can be used as an efficient tandem pumping source for high-power ytterbium fiber laser, but it is difficult to improve signal fiber laser output power. One of the efficiency methods to break through this limitation is beam combining. In this paper, based on 19 single-mode 1018 nm fiber lasers and a 191 fiber combiner, we setup an all-fiber schematic laser combining system, and achieve 5 kW laser output with 1018 nm.
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