五阶非线性光纤中二阶孤子对的演化特性  

Evolution property of the second-order soliton pair in optical fibers with quintic nonlinearity

作　　者：岳进[1] 杨荣草[2] 

机构地区：[1]太原师范学院物理系,山西太原030031 [2]山西大学物理电子工程学院,山西太原030006

出　　处：《激光与红外》2010年第4期397-400,共4页Laser & Infrared

基　　金：山西省教育厅科技开发项目(No.20091031)资助

摘　　要：从包含五阶非线性项的扩展非线性薛定谔方程出发,采用分布傅里叶算法,数值模拟了五阶非线性作用下二阶孤子对的波形演化。结果表明,正、负五阶非线性对二阶孤子对的作用大不相同。负五阶非线性作用使二阶孤子对传输图形得到一定程度的改善,而正五阶非线性作用则使二阶孤子对传输图形恶化。适当选取负五阶非线性参数值,可以消除二阶孤子对间的衍生孤子,有效的抑制孤子间的相互作用。Using the extended nonlinear Schrodinger equations including quintic nonlinearity and the split-step Fourier algorithm,the shape evolution of the second-order soliton pair is numerically simulated for different parameters of positive and negative quintic nonlinearity.The results show that the interaction between the second-order solitons with positive quintic nonlinearity is much different from that with negative quintic nonlinearity.The later improve the shape evolution of the second-order soliton pair in the certain degree,but the shape of the former is deteriorated.The numerical results find the periodical yielding smaller solitons between two second-order solitons may be well restrain under appropriate parameter of the negative quintic nonlinearity.

关 键 词：五阶非线性 二阶孤子对 相互作用 

分 类 号：O431[机械工程—光学工程] O437[理学—光学]