Spectral and temporal control of an actively mode-locked fiber laser

We report theoretical and experimental investigations on the spectral and temporal control of a mode-locked fiber laser using a chirped fiber Bragg grating and a loss modulator in either a undirectionnal ring cavity or a standing-wave cavity. The fiber laser generates picosecond pulses with a rapid tuning over a large bandwidth. Tuning is achieved by controlling the frequency of the applied modulation waveform. The adjustement of pulse duration between 40 - 500 ps and the rapid tuning from 1513 nm to 1588 nm are described.