光伏孤子对向传播相互作用研究

Interactions between counter-propagating photovoltaic spatial solitons

用数值方法研究了对向传播条件下不同频率的光伏孤子的相互作用行为.结果表明,两个不同频率的光伏孤子在对向传播相互作用过程中表现出不同的空间演化动力学特性.共轴对向传播时两孤子光场有着不同的会聚或发散行为,并且依赖于晶体长度;非共轴对向靠近传播孤子的会聚或发散作用有所减弱,但频率较大的孤子对频率较小的孤子有显著的吸引作用,使其发生横向偏移,孤子的演化方式也不同于同向传播的情形.

We study the interactions between two counter-propagating photovohaic spatial solitons with different frequencies. Numerical results show that these two solitons display different dynamic characteristics during spatial evolution, which also differ obviously from the case of co-propagation. These two solitons exhibit different induced focusing or defocusing behavior when they propagate coaxially, which is sensitive to the specimen length. When they propagate in parallel and closely overlapping, the induced focusing or defocusing effects are weakened and the soliton with higher frequency attracts the one with lower frequency markedly. And their evolutions are different from the case of co-propagation.