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Abstract
In this paper, based on the simple model of fiber laser, the transmission characteristics of Akhmediev breathers in fiber laser is studied numerically by the split-step Fourier method. The Akhmediev breathers are influenced by the average dispersion and the small signal gain coefficient in fiber laser. The results show that Akhmediev breathers can be stable transmitted when the average dispersion and nonlinear effects are balanced. The larger the small signal gain coefficient, the peak intensity of Akhmediev breathers is greater with the width narrower. And the spatial separations of the sub-pulses are gradually reduced. In addition, the collision of two breathers can form the localized high-amplitude pulse trains in fiber laser. The results obtained in this paper can provide a theoretical basis for the study of the transmission of Akhmediev breathers in fiber laser.
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