非线性光学格子中二阶孤子的传输特性研究  

Study on the Characteristics of Two-order Soliton Propagation in Nonlinear Optical Lattice

作　　者：张景贵[1] 李勇帆[1] 赵晋琴[1] 

机构地区：[1]湖南第一师范学院信息科学与工程系,长沙410205

出　　处：《半导体光电》2013年第1期122-125,共4页Semiconductor Optoelectronics

基　　金：湖南省科技计划项目(2010GK3049);湖南省教改课题(2011(462));湖南第一师范学院课题项目(XYS10N10)

摘　　要：数值研究了二阶孤子在具有横向折射率周期性调制的Kerr型光学格子中的传输特性,研究结果表明:横向折射率周期性调制会导致二阶孤子裂变成振幅大小不等的两基态孤子。当初始入射角大于某一临界值或调制周期与调制深度小于某一临界值时,裂变后大振幅基态孤子将跨越势阱向前传输;反之,它将被类似波导形式的路径俘获。而小振幅基态孤子将始终跨越势阱向前传输。因此光学格子中二阶孤子这种独特传输行为对光计算、全光通信以及新型光子器件开发等领域具有重要的理论和实际指导意义。The propagation characteristics of two-order soliton were numerically studied in Kerr-type nonlinear medium with transverse periodic modulation of refractive index. It is shown that the periodic modulation will lead to the formation of two fundamental solitons with different amplitudes resulted form two-ordei： soliton＇s decay. Further, the fundamental soliton with big amplitude will propagate across the potential well when the incident angle is above a critical value or the rfiodulation depth and period are below a critical value; otherwise, it will propagate across the potential well. However, the one with small amplitude will always propagate across the potential well. Therefore, the special propagation behavior of two-order soliton in optical lattice is expected to show great potential for many applications such as optical calculation, all optical communication and the development of novel photonie devices, both theoretically and practically.

关 键 词：光电子学 二阶孤子 传输特性 光学格子 孤子衰变 

分 类 号：TN929.1[电子电信—通信与信息系统]