Impact of spectral filtering on pulse breaking-up and noise-like pulse generation in all-normal dispersion fiber lasers
Runqin Xu, Fanjiang Xu, Yanrong Song, Lei Duan, Yunbo Song, Shudan Tan, Zhaohui Liu
Abstract
Based on mathematic simulations, the impact of spectral filtering on pulse breaking up and noise-like pulse generation in all-normal-dispersion fiber lasers are investigated. Three types of spectrum filters are employed in the simulations, which have a Gaussian-shaped profile, super-Gaussian-shaped profile, and sinusoidal-shaped profile, respectively. With the Gaussian-shaped filter, the pulse breaking-up process is discussed. The super-Gaussian-shaped filter and the sinusoidal-shaped filter have two different formation mechanisms for noise-like pulses and are revealed. In addition, with the sinusoidal-shaped filter, dissipative solitons of different central wavelengths are achieved.