五阶非线性对源啁啾皮秒孤子传输的影响  

The Effect of Quintic Nonlinearity on the Propagation Properties of Picosecond Solitons with Source Chirp

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：《太原师范学院学报（自然科学版）》2010年第1期85-89,109,共6页Journal of Taiyuan Normal University:Natural Science Edition

基　　金：山西省高校科技项目(20091031)

摘　　要：从光纤中包含五阶非线性项的非线性薛定谔方程出发,数值研究了五阶非线性下源啁啾皮秒孤子间的相互作用.结果表明:正、负五阶非线性对源啁啾皮秒孤子的传输影响不相同.当源啁啾参数值较小时,前者表现为两孤子经过一段传输距离发生碰撞,然后合二为一.后者,表现为周期渐减的离合状态,当源啁啾参数值增大到一定值以后,两种情况下孤子都产生裂变.这对光孤子通信系统是非常有害的,采用不等振幅法在一定程度上对正、负五阶非线性下源啁啾皮秒孤子间的相互作用进行了有效的抑制.Based on the model of the nonlinear Schrǒdinger equation with quintic term,we numerically study the interaction between the picosecond solitons with source chirp in optical fiber with quintic nonlinearity. The results show that the interaction between the picosecond solitons with positive quintic nonlinearity is different from that with negative quintic nonlinearity. When the source chirp is smaller, the former attracts each other and collide into one solitons. While latter is decreasing periodic repulsion and attraction. The farther increase of the source chirp will lead to the split of solitons. This interaction is very harmful to the optical soliton communication. The interactions between picosecond solitons with source chirp are suppressed by unequal amplitude method to some extent.

关 键 词：五阶非线性效应 源啁啾 孤子相互作用 

分 类 号：O431[机械工程—光学工程] O437[理学—光学]