Bandwidth Tunable, Dispersion-managed Mode-locked Thulium/holmium Fiber Laser

We have demonstrated a mode-locked thulium/holmium doped fiber laser using carbon nanotubes as the saturable absorber. Combined with dispersion management, 250 fs pulse width and 1.58 nJ energy pulses, with a bandwidth tunable from 40-62 nm, were obtained directly from the fiber oscillator. Wide spectral and high energy pulses from mode-locked thulium/holmium co-doped fiber laser are likely to be further compressed to sub 100 fs.