Ultrashort Pulses from the Soliton Laser.

We report the production of 60 fs FWHM pulses directly from the soliton laser and 19 fs pulses with compression in an external fiber. The 19 fs FWHM corresponds to just under 4 optical cycles at the laser wavelength of 1.5microns. We argue that these limits are set by dispersion properties of the control and compression fibers.