High-power passively mode-locked Er-doped fiber laser with a nonlinear optical loop mirror

We report the generation of pulses having a duration of 1 ps and a pulse energy of 280 pJ directly from a passively mode-locked Er fiber laser. The laser uses a nonlinear optical loop mirror at high switching threshold in an all-optical fiber resonator. Stable pulse trains are produced at the fundamental repetition rate of the resonator, 3.8 MHz.