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

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 =/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.