五阶非线性效应下三阶孤子对演化的数值研究  

Numerical simulation of shape evolution of third-order soliton pair under quintic nonlinear effect

作　　者：岳进[1] 王荣成[1] 

机构地区：[1]太原师范学院物理系,山西太原030031

出　　处：《量子电子学报》2011年第4期461-466,共6页Chinese Journal of Quantum Electronics

基　　金：山西省教育厅科技开发项目(20091031)

摘　　要：对五阶非线性效应下三阶孤子间的相互作用进行了数值研究,结果表明:正五阶非线性作用将会导致三阶孤子对波形进一步恶化。在负五阶非线性作用下,原来的三阶孤子很快发生裂变,三阶孤子对同相位时,裂变后峰值小的两孤脉冲位于内侧,两个三阶孤子表现出先吸引、碰撞,然后聚合成一个孤脉冲。三阶孤子对反相位时,裂变后峰值强度小的孤脉冲位于外侧,并且一直保持排斥状态,每个三阶孤子裂变数目随负五阶非线性参数绝对值的增大而增多。适当选取负五阶非线性参数值,可以有效地抑制三阶孤子间的相互作用。The interaction between two neighboring third-order solitons was numerically studied under quintic nonlinear effect.The results show that the positive quintic nonlinear effect can lead to the shape of third-order soliton pair further worsening,in-phase and out-phase third-order soliton pair are both split under negative quintic nonlinear quickly.If the third-order soliton pair has the same phase,the two split optical pulses with lower peak value lie inside.It is found that the third-solitons attract each other and collide into one optical pulse.If the third-order soliton pair has the opposite phase,the two split optical pulses with lower peak value lie outside and keep the state of repulsion.When the third-soliton pair has opposite phase,the bigger the absolute value of negative quintic nonlinear parameter is,the more the number of solitons split from third-order soliton pair are.The results also show that the interactions between two neighboring third-order solitons may be well suppressed under appropriate parameters of the negative quintic nonlinearity.

关 键 词：非线性光学 五阶非线性 三阶孤子对 裂变 相互作用 

分 类 号：O437[机械工程—光学工程]