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采用分步傅里叶方法数值研究了在线性色散平坦光纤反常色散区等幅同相孤子脉冲相互作用受高阶色散、拉曼效应、光纤损耗和啁啾参量C等的影响规律。多孤子脉冲在线性和凸形色散平坦光纤中传输100个孤子周期后仍具有孤子特性。在线性色散平坦光纤,多孤子脉冲相互作用受三阶色散影响较严重,三阶色散使各脉冲产生较大的色散波和线性时延;更高阶色散的影响可以忽略;拉曼效应使脉冲产生较大的非线性时延;啁啾加强了脉冲间相互作用;光纤损耗减弱了脉冲间相互作用。
The influence of high-order dispersion, Raman effect, fiber loss and chirp parameter C on the impulsive interaction of equiaxed soliton in anomalous dispersion region of linear dispersion flattened fiber was numerically investigated by using the step-by-step Fourier method. Multi-soliton impulses still have soliton characteristics after transmitting 100 soliton cycles in linear and convex dispersion flattened fibers. In the linear dispersion flattened fiber, the multi-soliton pulse interaction is more seriously affected by the third-order dispersion, the third-order dispersion produces larger dispersion wave and linear delay for each pulse; the influence of the higher-order dispersion can be ignored; Raman effect makes the pulse Resulting in a larger nonlinear delay; chirp to strengthen the interaction between pulses; fiber loss weakened the interaction between pulses.