面向大容量相干光正交频分复用（CO-OFDM）传输系统的光信道非线性损伤补偿技术研究

项目名称： 面向大容量相干光正交频分复用（CO-OFDM）传输系统的光信道非线性损伤补偿技术研究

项目编号： No.61471179

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 无线电电子学、电信技术

项目作者： 罗风光

作者单位： 华中科技大学

项目金额： 80万元

中文摘要： 相干光OFDM（CO-OFDM）技术融合了OFDM技术和相干光通信的优点，具有超高传输速率、超大传输容量和高频谱效率，是发展单信道T比特光传输的主流技术，是构建下一代超高速率、超长传输距离及低成本光传输系统颇具竞争力的技术之一；由于CO-OFDM传输系统的信号频谱效率较高，因此在光传输链路中极易受非线性损伤的影响导致信号传输质量下降，尤其是在T比特超高速率光传输系统中非线性效应更为突出。本项目通过研究CO-OFDM信号在链路中传输的非线性作用机理，建立CO-OFDM信号的非线性效应数学模型，并以此模型为基础重点展开针对信道中自相位调制（SPM）、交叉相位调制（XPM）以及四波混频（FWM）等三类效应的损伤补偿架构和算法的研究，实现目标系统中Launch Power提升4dB以上，由本项目研究成果所贡献的系统Q值提升2dB以上。

中文关键词： 光传输系统；相干光正交频分复用；非线性损伤补偿；相干光传输；非线性检测

英文摘要： Coherent optical orthogonal frequency-division multiplexing (OFDM) technology combined with both OFDM technology and the advantages of coherent optical communication，it has such features of high transmission rate, large transmission capacity and high spectrum efficiency. it's a mainstream support for ultra-capacity, ultra-high speed, ultra-long haul T bit/s optical transmission system. Due to the higher spectrum efficiency of CO-OFDM transmission system, Signals are easily affected by the nonlinear of fiber links and led to the decrease of the transmission quality. This project is carry out the CO-OFDM transmission channel nonlinear mechanism researching, set up the the nonlinear mathematical model based on OFDM signal, mainly research on the structure and algorithm for optical-channel nonlinear compensation, include of Self-phase modulation, cross phase modulation and four-wave mixing effect, make the launch power of target system increased more 4dB, the system Q-value increased 2dB at least.

英文关键词： Optical transmission system;CO-OFDM;Nonlinear compensation;Cohernet optical transmission;Nonlinear monitoring