8.08 W holmium doped fluorotellurite fiber laser at 2067 nm

This is the authors' abstract. We don't add key points for this paper.

We reported a multi-watt ~2.1 µ m laser output from a 30 cm long Ho 3+ -doped fluorotellurite microstructured fiber (FTMF) pumped by a homemade 1980 nm Tm 3+ -doped silica fiber laser. When the pump power was increased to 61.8 mW, lasing at 2067 nm was achieved from the Ho 3+ -doped FTMT, and an unsaturated maximum output power of ~8.08 W was obtained for a pump power of ~10.56 W. The corresponding slope efficiency was about 77.21%. During our experiments, no obvious damage was observed on the end face of the Ho 3+ -doped FTMF. Our results indicated that Ho 3+ -doped fluorotellurite fibers had the potential for constructing high power fiber lasers at 2.1 µ m.