Article révisé par les pairs
Résumé : Continuous-wave high-repetition rate optical dark pulse trains have been experimentally generated in an erbium-doped fiber laser. The laser is passively modelocked with the help of dual-peak fiber Bragg grating filter and dissipative four-wave mixing. The laser operates in the normal dispersion regime and introduces the concept of dissipative four-wave-mixing modelocking (DFWM) as a passive modelocking mechanism. DFWM modelocking uses the concept of a dual-peak bandpass filter in the laser cavity, in which only two modes experience net positive gain. The two modes transmit their energy by four-wave-mixing to their higher order harmonics, which due to the bandpass nature of the filter undergo net negative gain.