入射光强对多个亮孤子相干相互作用的影响

Effect of incident optical intensity on coherent interaction of multiple bright solitons

为了研究入射光强对多个亮屏蔽孤子之间相干相互作用的影响,采用数值模拟的方法求解孤波演化方程。在特定的相互作用距离和相对相位条件下,改变入射孤子的光强,分别对2个孤子和3个孤子的相干相互作用做了分析。结果表明,在同相位条件下,2个孤子的相互作用表现出融合-分开-融合的周期性;对3个孤子,这种周期性消失;同时表现出能量的定向转移特性。改变入射光强的大小,能够控制能量转移的方向。在相反相位的情况下,2个孤子和3个孤子类似,都表现出相互排斥的相互作用,入射光强的大小会影响相互作用的程度。当孤子之间相位差为π/2时,2个孤子和3个孤子都表现出能量的定向转移,能量转移方向由相对相位差的符号决定;对3个孤子,随着入射光强的增加,伴随着能量的转移,还会表现出一定的排斥作用。此研究结果说明入射光强对孤子的相互作用具有一定的调节作用。

In order to study the effect of incident optical intensity on coherent interaction of multi bright screening spatial solitons , evolution equations of solitary wave were solved by numerical simulation .Under the conditions of the giving distance of interaction and relative phase , the coherent interactions of two and three solitons were analyzed respectively under different optical intensity of incident solitons .The result shows that , under the in-phase conditions , two solitons have the period of fusion-separate-fusion.For three solitons, this period will disappear and the energy transfer will emerge .The direction of energy transfer can be controlled by varying the value of the incident optical intensity .Under the out-of-phase conditions , both two solitons and three solitons show the interaction of repulsion each other .The value of repulsion is affected by the incident optical intensity .Both two solitons and three solitons show the energy transfer when the phase difference is φ=π/2 and the direction of energy transfer is determined by the sign of phase difference .For three solitons , small repulsion will emerge accompanied with the energy transfer when the incident optical intensity increases .All the results show that the incident optical intensity can affect the coherent interaction of solitons .