摘要
高阶色散及高阶非线性效应是制约光孤子稳定传输的重要因素。基于光孤子传输的非线性薛定谔方程,综合考虑三阶色散和五阶非线性的影响,采用分步傅里叶算法,数值研究了三阶孤子对间的相互作用。结果表明:三阶色散导致三阶孤子对无规则地裂变,裂变后的光脉冲形状发生畸变,脉冲中心位置出现偏移;考虑负五阶非线性作用后,在一定程度上抑制了孤子裂变,但是光脉冲在传播过程中伴有能量转移。而正五阶非线性作用使三阶孤子对传输图形进一步恶化。适当地选取负五阶非线性参数值,可以完全消除三阶孤子对的裂变和相互作用,改善了脉冲中心位置的线性偏移。
The effect of high-order dispersion and high-order nonlinearity are the key restriction factors of the optical soliton steady transmission in the optical fiber.Based on the model of the nonlinear Schrdinger equation with the optical soliton propagating,we numerically study the interaction between two neighboring third-order solitons by combining the influence of the fifth-order nonlinear and third-order dispersion.The results show that the influence of third-order dispersion can lead to the ruleless split of the third-order soliton pair,the split pulses shape distorted and the drift of the central position of optical pulses.In consideration of the negative quintic nonlinear effect,the solitons split is to a certain extent control but there is the shift of energy in the optical pulse propagation.Moreover,The effect of positive quintic nonlinear make to the shape of the third-order soliton pair further worsening.The results also show that the interactions and split between two neighboring third-order solitons may be well eliminated and improved the linear drift of the central position of the optical pulses under appropriate parameter of the negative quintic nonlinearity.
出处
《激光杂志》
CAS
CSCD
北大核心
2012年第1期52-54,共3页
Laser Journal
基金
山西省教育厅科技开发(20091031)资助项目
关键词
三阶孤子对
三阶色散
五阶非线性
相互作用
third-order soliton pair
third-order dispersion
quintic nonlinearity
interaction
