为了研究了自相似脉冲对在色散渐减光纤中的动力学特性, 采用非线性薛定谔方程对脉冲对的演化和压缩特性进行了模拟, 分析了脉冲对在演化过程中相邻区域产生的相互作用。结果表明, 不考虑3阶色散时, 脉冲对在自相似演化过程中, 相邻的区域将产生对称性的相互振荡, 而脉冲其它区域演化不受影响, 通过色散补偿可以得到脉宽为128.4fs、压缩因子为7.8的压缩脉冲对;而在考虑3阶色散时, 脉冲对的演化将产生畸变, 相邻区域的振荡呈现不对称性, 通过色散补偿技术, 得到脉宽为211.6fs、压缩因子为4.7的压缩脉冲, 虽然不对称性振荡使得压缩脉冲出现较明显的基座, 但几乎不影响压缩质量。该研究结果对自相似脉冲对的演化的理解具有参考价值。

In order to study the dynamic characteristics of self-similar pulse-pairs in dispersion decreasing fiber, the evolution and compression of pulse-pairs were simulated theoretically with nonlinear Schrdinger equation. In addition, the interactions between the pulses in the neighboring region were analyzed. The results show that without considering the third-order dispersion, the symmetrical oscillation is created in the overlap region while the evolution of pulses is unaffected outside the overlap region. After dispersion compensation, the compressed pulse-pairs are obtained with the temporal width of 128.4fs and the compression factor of 7.8. When considering the third-order dispersion, the evolution of pulses is distorted and created asymmetrical oscillation in the overlap region. The compressed pulse-pairs have a temporal width of 211.6fs and the corresponding compression factor of 4.7. It is worthy of noticing that the pedestals of compression pulse due to asymmetrical oscillation do not affect the quality of the pulses severely. The results provide references for the evolution of self-similar pulse-pairs.