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相干光伏空间孤子非对称碰撞研究
Asymmetrical collision among coherent photovoltaic spatial solitons
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摘要: 采用数值方法研究了三个呈非对称分布的相干光伏空间孤子碰撞相互作用．结果表明，随着信号光的入射角度在一定范围内逐渐改变，三个孤子在晶体中碰撞后会产生孤子的分裂或湮没现象．当孤子碰撞后出现分裂或湮没时，若保持孤子的碰撞角度不变，改变其中任意一个孤子的初始相对相位，孤子的碰撞行为也将随之迅速改变，产生新的孤子分裂、湮没或其他碰撞现象．另外，研究结果还表明，作为具有不可积哈密顿系统特性的光伏孤子，其小角度碰撞过程中动量和能量仍然是守恒的．Abstract: Asymmetrical collisions among three coherent photovohaic spatial solitons are investigated by numerical method. The numerical results show that the solitons will split or annihilate depending on the incident angle of signal beams in a certain range. If we only change the initial phase difference among the solitons, the collision behavior of solitons will also change correspondingly, showing an interesting conversion of split between annihilation. Furthermore, the numerical results show that the photovohaic spatial solitons will maintain conservations of momentum and energy in these collision processes, although the dynamical system of photovoltaic solitons is a non-integrable Hamilton one.
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