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In this paper,the characteristics of soliton in a passively mode-locked Er-doped fiber laser modeled by a non-distributed model are numerically investigated with the split-step Fourier method.Based on the analysis and model,sech2-shaped soliton is obtained by controlling the group velocity dispersion(GVD)and small-signal gain of the gain fiber.The law that the dispersion influences the characteristics of soliton in the mode-locked fiber laser is researched in net-cavity averaged anomalous dispersion regime.
In this paper, the characteristics of soliton in a passively mode-locked Er-doped fiber laser modeled by a non-distributed model are numerically investigated with the split-step Fourier method. Based on the analysis and model, sech2-shaped soliton is obtained by controlling the group velocity dispersion (GVD) and small-signal gain of the gain fiber. The law that the dispersion that the effects of soliton in the mode-locked fiber laser is researched in a net-cavity averaged anomalous dispersion regime.