PASSIVE HARMONIC MODE-LOCKING IN ALL-FIBER SOLITON LASER - ENERGY-STATES AND STABILITY ASPECTS

The behaviour of a passively mode-locked soliton laser, under differen t energy states, is studied by using a numerical simulation. The short er pulse obtainable is determined, pointing out the soliton properties of the output pulses. In the case of harmonic mode-locking, power qua ntisation related to the number of existing pulses in the cavity, is o btained and repetition rate instability is detected. It is found that by introducing a narrow band optical filter in the cavity and by optim ising the filter bandwidth, this instability is substantially reduced.