Noise-like color pulses and domains in ring fiber lasers with an anomalous dispersion cavity

Abstract

We have numerically studied a noise-like regime for the formation of color pulses and domains in dual-wavelength fiber lasers. In the established generation, each of these pulses and domains consists of two noise-radiation square fragments with different carrier frequencies. The noise radiation regime is due to the Kerr nonlinearity of the fiber making up the laser ring cavity. The spectral and temporal structures of this noise radiation have been determined. We have found the main regularities in the change of lasing regimes as the laser parameters are changed. The results obtained are of interest for understanding the nonlinear dynamics of noise-like radiation and for further development of methods for controlling laser regimes.