（1+1）维光折变亮屏蔽孤子相互作用的数值分析

利用束传播法对（1+1）维光折变亮屏蔽孤子间的相互作用进行了详细地数值模拟研究.结果表明：两同相孤子相互吸引，并伴有孤子融合现象，且孤子融合发生时的作用距离随着孤子初始间距的增大而增大；两反相孤子相互排斥，且排斥作用随着孤子初始间距的减小而增强；当两孤子的相位差位于区间（0,π）和（－π，0）中时，其相互作用过程将伴有能量转移，但两区间内能量转移的方向相反，并表现出反转对称性；由于孤子间的距离和相对相位对孤子间的相互作用均有很大的影响，因此多个孤子间的相互作用过程非常复杂，但可以通过分析相邻孤子间的相互作用对其进行定性的预测.

Numerical Investigations of Interactions among Planar Bright Photorefractive Screening Solitons

Detailed numerical investigations of the interactions among planar bright photorefractive screening solitons are performed by employing the so-called beam propagation method (BPM). It's found that two in-phase solitons attract each other,and soliton fusions do occur at certain interaction length,which increases monotonously with the initial separation of the two interacting solitons. While in the case of out-of-phase,the two solitons repel each other with a force decreasing monotonously with the initial separation. When the relative phase between the two solitons falls within the ranges of (0,π) and (－π,0),energy transfer will accompany the interactions. Moreover,interactions among multiple solitons could be qualitatively predicted by analyzing those of the neighboring ones.