高速相干光通信基础理论与关键技术研究

项目名称： 高速相干光通信基础理论与关键技术研究

项目编号： No.61331010

项目类型： 重点项目

立项/批准年度： 2014

项目学科： 无线电电子学、电信技术

项目作者： 唐明

作者单位： 华中科技大学

项目金额： 285万元

中文摘要： 高速相干光通信技术已成为当前国内外广泛关注和研究的焦点，但相干通信系统中各种相位噪声和偏振不确定性成为了限制系统传输容量进一步提升的主要因素。本项目围绕抑制非线性损伤、控制相干噪声和相干光采样三个关键科学问题，针对限制超高速长距离相干光通信系统性能提升的关键因素，重点探索在大色散、损耗与非线性受限条件下高速相干光通信系统中光信号的电场传输规律，研究相干通信系统中相干光源和通信链路各种线性与非线性损伤机理及其补偿机制，突破低噪声放大技术和基于相干光采样的光性能监测技术，在此基础上研究新型编码和编码级联组合对信道参数的依赖关系，提出效率高、复杂度低和时延小的超强纠错信道编解码方法，并搭建相干光通信系统实验平台，完成相关体系架构、关键技术和算法的实验验证和测试。项目研究成果可望用于更高传输速率的下一代相干光通信系统，具有重大的理论意义和应用价值。

中文关键词： 相干调制;非线性;光传输系统;解调;偏振

英文摘要： The high speed coherent optical communication technologies are gaining increasing concerns in recent years. However, the phase noise, polarization uncertainty and nonlinearity effects in the coherent optical communication system have become the limiting factor to further increase the system capacity. By focusing on three scientific problems which include how to suppress the nonlinear distortions, how to control the phase noise, and how to realize coherent optical sampling, these limiting factors will be comprehensive investigated in this project proposal. First, Intensive research work will be carried on the analysis of electrical field transmission law in large-dispersion-attenuation-nonlinearity-limited high speed coherent optical system. Second, the mechanism and compensation method of the linear and nonlinear noises in coherent optical sources and communication link will be explored. Third, the key technologies of low-noise optical amplification and performance monitoring in coherent optical system will be investigated. Afterward, the relationship between the novel encoding method and channel parameters will be discussed, and a novel high-efficient, low-complexity and low-delay channel encoding/decoding algorithm will be proposed and designed. Furthermore, a high speed coherent optical communication experimental platform will be built up to verify and test the relative network architecture, the key techniques and algorithms. The research results of this project will have great theoretical significance and practical values, and could be used for the next generation coherent optical communication system which has higher capacity.

英文关键词： coherent modulation;nonlinearity;optical transmission system;demodulation;polarization