光折变屏蔽光伏亮孤子相互作用研究

Coherent collision between photorefractive screening-photovoltaic bright spatial solitons

为了得到两个或多个光折变屏蔽光伏亮孤子之间相互作用结果,采用数值方法分析了两个或多个屏蔽光伏亮孤子之间的相互作用。两同相孤子作用时表现为相互吸引,并伴有融合现象,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;两反向孤子相互排斥,且排斥作用随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,其相互作用过程中伴有能量的转移,两区间中能量转移方向相反。多个同向孤子相互作用时,不同于两个孤子周期的融合和分开,而是在整体吸引过程中发生孤子的逐步融合作用。当中间孤子与两边孤子的相位差是π/2时,多个孤子之间存在能量转换。而邻近相互反相的多个孤子相互作用时,能保持很好的稳定性传播。结果表明,这种相对相位控制下的两孤子问相互作用的变化有望用于光开关器件。多个孤子作用结果对形成孤子阵列及阵列波导具有指导意义。

In order to understand the interaction between two or multiple screening-photovohaic bright spatial solitons, the interaction was numerically simulated. Both in-phase solitons attract each other and soliton fusions do occur at a certain interaction length, which increases monotonously with their initial separation. While in the ease of out-of-phase, both the solitons repel each other with a force decreasing monotonously with the initial separation. When the relative phase between the solitons falls within the ranges of （0,π）and（ -π,0 ） ,energy transfers in reverse direction. When the multiple solitons are in-phase ,they will attract each other and the inner ones will fuse together gradually. When the relative initial phase between any two adjacent solitons isπ/2, energy transfers among them. When the colliding solitons are out of phase, they propagate stably, The result indicate that the change of interaction between both solitons controlled by relative phase can be applied in all optical switch, and that the interaction result of multiple spatial solitons may be useful for the formation of soliton array and waveguide array.