正五阶非线性对飞秒孤子传输的影响  

Influence of Positive Quintic Nonlinearity on the Propagation of Femtosecond Solitons

作　　者：岳进[1] 

机构地区：[1]太原师范学院物理系,山西太原030031

出　　处：《中北大学学报（自然科学版）》2010年第3期216-220,共5页Journal of North University of China(Natural Science Edition)

基　　金：山西省教育厅科技开发项目(20091031)

摘　　要：应用包含五阶非线性项的高阶非线性薛定谔方程,对正五阶非线性光纤中飞秒孤子间的相互作用进行了数值研究,并与负五阶非线性下飞秒孤子间相互作用比较.结果表明:正、负五阶非线性对飞秒孤子的影响不同.正五阶非线性的作用,使两孤子先相互吸引、合二为一后,强烈排斥,并伴有能量转移,后一个孤子的部分能量转移给前一个孤子,使前一个孤子的峰值强度增加.正五阶非线性加重了孤子脉冲中心位置的非线性偏移.采用不等相位法在一定程度上可以抑制孤子间的相互作用.Using high-order nonlinear Schrodinger equations including quintic nonlinearity terms,the interaction was numerically studied between the femtosecond solitons in optical fiber with positive quintic nonlinearity and compared with that of negative quintic nonlinearity.The results show that the interactions under the two nonlinearity modes are different.Under the positive quintic nonlinear effect,two neighboring femtosecond solitons attract each other and then strongly repel after combined into one.Simultaneously,the peak energy of the former soliton increases because the latter soliton transfers its partial energy to the former one.The positive quintic nonlinear effect results in the serious nonlinear drift in the central position of the femtosecond solitons. The interactions between femtosecond solitons can be restrained by the unequal phase method to some extent.

关 键 词：正五阶非线性 飞秒孤子 光脉冲 薛定谔方程 

分 类 号：O431[机械工程—光学工程] O437[理学—光学]