A compact, high power, ultrafast laser mode-locked by carbon nanotubes

We report ultrafast highly chirped pulses from an erbium doped, nanotube-mode-locked fiber oscillator. We generate $1.6W$ average power and $11kW$ peak power by seeding a fiber amplifier. This paves the way to mode-locked all-fiber master oscillator amplifiers as economic and compact sources for high-power applications, such as micromachining and laser surgery.