光时分复用准线性传输系统的非线性相互作用  

Intrachannel Nonlinear Effects in Optical Time Division Multiplexing Dispersion-Managed Quasi-Linear Transmission System

作　　者：蔡炬[1] 杨祥林[1] 

机构地区：[1]南京邮电学院光信息技术系,南京210003

出　　处：《光学学报》2005年第1期93-98,共6页Acta Optica Sinica

基　　金：国家自然科学基金(60072046)资助课题。

摘　　要：　研究了高速色散控制准线性传输系统中的信道内交叉相位调制和信道内四波混频等非线性相互作用,分析了信道内交叉相位调制导致定时抖动和信道内四波混频导致振幅抖动随距离和色散分布强度变化的规律,然后运用快速傅里叶变换法分析了信道内交叉相位调制导致的 25 -1 的伪随机码流的定时抖动和振幅抖动及寄生脉冲的产生,证实了理论分析。最后通过数值模拟实现了色散分布强度为127的强色散控制系统中准线性脉冲序列1600 km的稳定传输,结论对用标准单模光纤实现高速传输具有重要意义。The intrachannel cross-phase modulation (IXPM) and intrachannel four-wave mixing (IFWM) in dispersion managed quasi-linear systems is researched, and the role of the timing jitter induced by IXPM and the amplitude jitter and the ghost pulse induced by IFWM change with distance and dispersion map strength are analyzed theoretically. Then the theoretical analysis results are verified by the timing jitter, amplitude jitter and the generation of ghost pulse of a 2s-1 pseudorandom binary sequence (PRBS) by using fast Fourier transform method. Finally, the stable transmission of 1600 km is verified in dispersion managed quasi-linear systems with dispersion map strength of 127 by numerical simulations. The results are important for high speed transmission based on single-mode fiber.

关 键 词：非线性光学 色散控制准线性脉冲 非线性相互作用 信道内交叉相位调制 信道内四波混频 

分 类 号：TN25[电子电信—物理电子学]