Femtosecond mode-locked holmium fiber laser pumped by semiconductor disk laser.

We report on a 2085 nm holmium-doped silica fiber laser passively mode-locked by semiconductor saturable absorber mirror and carbon nanotube absorber. The laser, pumped by a 1.16 µm semiconductor disk laser, produces 890 femtosecond pulses with the average power of 46 mW and the repetition rate of 15.7 MHz.

All-fiber 10 W holmium lasers pumped at lambda=1.15 microm.

Three all-fiber Ho-doped lasers emitting in the range of 2050-2100 nm were fabricated. The lasers were pumped by an Yb-doped fiber laser at 1147 nm with a power up to 35 W. For all the lasers tested, the output power was found to be as high as 10 W, the efficiency slope being 30%.