0.65 W single-mode Yb-fiber laser at 980 nm pumped by 1.1 W Nd:YAG

It is well known that Yb: SiO 2 fibers lase efficiently both in the three-level transition at 980 nm and the quasi-four-level transitions from 1.030 to 1.1 µ m, with early experiments reporting a few mW’s of output power [1].