Tuneable megawatt-scale sub-15 fs visible pulses via dispersive wave emission pumped by a gain managed fiber amplifier

We demonstrate tuneable sub-15 fs pulses covering 550 nm to 700 nm with up to megawatt peak power by pumping an argon-filled antiresonant hollow-core fiber with 34 fs pulses directly from a compact ytterbium fiber oscillator gain managed nonlinear power amplifier.