通过数值模拟对飞秒光脉冲间的相互作用进行了研究,结果表明:飞秒孤子的相互作用与常规的皮秒孤子间的相互作用不同。后者在孤子间距较小的情况下,相互作用表现为周期性离合,而前者的相互作用更严重,在初始阶段其相互作用与皮秒孤子一致,而当两孤子合二为一后,一直处于排斥状态,孤子间距随传输距离增加而增加。这在通信系统中将造成更大的误码率。传统的不等振幅法在一定程度上可有效地抑制飞秒孤子的相互作用。

The interaction between femtosecond optical pulses is studied by using numerical simulation. The results show that the interaction is different from that between picosecond optical pulses. Under the circumstance of nearer separation between solitons, the later is periodic repulsion and attraction, but the interaction of the former is more serious. At the initial moment, the interaction of femetosecone optical pulses is the same as that of picosecond optical pulse, but after the soliton pair become one pulse, they keep the state of repulsion and the separation between solitons increases along the distance. These can cause larger error code rate. The results also show that unequal amplitude method can reduce the interaction between femtosecond soliton in a certain degree.