Noise-like pulses in dispersion-controlled fiber lasers

Abstract

Abstract Noise-like pulse generation in ring lasers in which the anomalous dispersion of the cavity fiber is partially compensated by using a normal-dispersion fiber has been studied by numerical simulation. Solitons moving in this cavity are periodically subjected to temporal compression in the anomalous-dispersion fiber and expansion in the normal-dispersion fiber. It has been found that in these lasers, stationary solitons become unstable and passive mode locking occurs through the emission of bunched noise-like pulses consisting of chaotically evolving solitons. The results are relevant to the development of noise-like pulse generation and methods for controlling lasing regimes.