NRZ 码在弱非线性色散光纤中的演化及色散补偿后的非线性研究  

The Evolution of NRZ in Small Nonlinear Dispersion Fiber and the Investigation of Nonlinearity After Dispersion Compensation

作　　者：赵宏静[1] 吴重庆[1] 许天晖 王智[1] 赵永鹏[1] 

机构地区：[1]北方交通大学光波技术研究所

出　　处：《北方交通大学学报》1997年第6期664-669,共6页Journal of Northern Jiaotong University

基　　金：国家自然科学基金

摘　　要：随着色散补偿技术的成熟，高速光纤通信中另一个限制因素———非线性将随着光纤链路加长而积累起来，并引起新的波形展宽．就每一段光纤而言，均属弱非线性的色散光纤，因此，有必要对光信号在这种光纤中的演化进行深入研究．本文在前人研究的基础上得出了只考虑一阶初始非线性时ＮＲＺ码在弱非线性色散光纤中传输时域和频谱近似解析式，并且给出了频谱、波形随距离、色散、非线性的变化图．对于由正、负色散光纤组成的光纤链路，得出了色散达到最佳补偿时的非线性干扰系数．With the success in linear dispersion compensation techniques in optical fiber communication,a new limitation,namely nonlinearity,will be accumulated when the length of fiber link increases.Because every section of fiber is small nonlinearity dispersion fiber,it is necessary to deeply study the evolution of optical pulse in the weak nonlinearity dispersion fiber.In this paper,we get the NRZ series solution in frequency domain on the base of the research before when only considering the first order initial nonlinearity,and the transforming figures of spectrum and pulse form versus distance,dispersion and nonlinearity are given.As for fiber link that consists of positive and negative dispersion fibers,we got the nonlinear disturbance coefficient when dispersion is compensation in optimum.

关 键 词：NRZ码 光纤通信 非线性色散光纤 色散补偿 

分 类 号：TN929.11[电子电信—通信与信息系统] TN25[电子电信—信息与通信工程]