Erbium-doped fluorozirconate single-mode fibre lasing at 2.71 mu m

Continuous-wave lasing has been obtained at 2.714μm in a fluorozirconate single-mode fibre when pumping at 476.5, 501.7 or 647.1 nm. A threshold pump power of 7mW, an output laser power of 250μW and a linewidth less than 2 nm were measured