Generation of 47-fs pulses directly from an erbium-doped fiber laser.

We show both numerically and experimentally that through appropriately selecting the output coupling position and strength in a mode-locked fiber laser, one can effectively manage the nonlinearity of the cavity. By implementing the technique together with cavity dispersion management in an erbium-doped fiber laser, we have achieved stable mode-locked pulses with a single-pulse energy of 2.08 nJ and pulse width of 46.2 fs directly from the laser.