EFFECT OF FREQUENCY CHIRP ON SOLITON SPECTRAL SIDE-BAND IN FIBER LASERS

Fiber lasers emit soliton pulses that exhibit discrete spectral sideba nds generated through dispersive-wave resonances. The position of thes e soliton sidebands is shown to be affected by the amount of chirp acq uired by the pulse, and the degree of chirp is determined by total cav ity losses and gain dispersion. Our results show that the soliton chir p shifts the sideband frequencies and that sidebands can be generated even in the case of normal dispersion. The long- and short-cavity case s are discussed separately so that our results are applicable to all l aser configurations.