通过数值求解变系数非线性薛定谔方程,讨论具有有限背景宽度的皮秒暗光脉冲的传输和相互作用。结果表明,一种新的效应,即暗孤子的周期性再生效应,稳定地存在于具有分布参量的光纤系统中,不会受到孤子间相互作用的影响。并且,这种再生效应对损耗和有限的扰动(如白噪声)等不敏感。这表明暗孤子的周期性再生效应是稳定的。

The evolution and interaction of picosecond dark pulses with finite-width were discussed by solving the nonlinear Schrdinger equation with variable coefficients numerically. The results show that, periodic regeneration effect of dark solitons stably exists in the distributed system. And periodic regeneration of dark solitons is not influenced by the interaction. Further simulations indicate that this effect is less sensitive to both loss and finite perturbations, such as white noise. This reveals that this periodic regeneration effect is stable.