基于广义耦合非线性薛定谔方程及其N-孤子解, 采用分步傅里叶方法, 数值研究了自陡峭效应和自频移效应对N-孤子解传输特性的影响。结果表明: 自陡峭效应和自频移效应均会使1-孤子解在传输过程中发生偏移; 对于2-孤子解和3-孤子解的束缚态孤子形式, 自陡峭效应和自频移效应会引起孤子的偏转和能量的重新分配; 对于类呼吸结构的2-孤子解和3-孤子解, 自陡峭效应和自频移效应则会破坏类呼吸结构, 使各孤子发生分离, 最终形成振幅不等、传输速度不同的孤子。
耦合非线性薛定谔方程 自陡峭效应 自频移效应 coupled nonlinear Schrdinger equation self-steepening effect self-frequency shift effect
山西大学 物理电子工程学院,山西 太原 030006
基于广义耦合非线性薛定谔方程,采用Hirota双线性方法,得到了方程的N-孤子解,并详细研究了各个参数对孤子解脉冲传输特性的影响。结果表明:系统参数a、b、c主要影响孤子的振幅大小;参数ki的实部对孤子的振幅和脉宽均有一定程度的影响,而虚部则决定孤子的偏移速度的大小;参数ζ的改变使孤子解的p,q分量的传输特性不再相同,且各孤子的能量发生重新分配。
耦合非线性薛定谔方程 Hirota双线性方法 N-孤子解 coupled nonlinear Schrdinger equation Hirota bilinear method N-soliton solution
Author Affiliations
Abstract
1 Shandong Key Laboratory of Optical Communication Science and Technology, School of Physics Science and InformationTechnology, Liaocheng University, Liaocheng 252059, China
2 State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications,Beijing 100876, China
3 School of Advanced Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China
We present an extra processing added to conventional least square (LS) channel estimation to further improve its performance in coherent optical orthogonal frequency division multiplexing (CO-OFDM) system. The influence of noise, chromatic dispersion and polarization mode dispersion on the performance of the proposed algorithm is analyzed. The simulation results show that the improved algorithm has better performance and lower complexity.
光电子快报（英文版）
2014, 10(2): 140
