基于少模光纤的多维复用高频谱效率光传输机理研究

项目名称： 基于少模光纤的多维复用高频谱效率光传输机理研究

项目编号： No.61275069

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 无线电电子学、电信技术

项目作者： 付松年

作者单位： 华中科技大学

项目金额： 80万元

中文摘要： 随着光通信网络规模不断扩展、容量快速增长、业务日益丰富、应用愈加灵活，寻求新型高效大容量光传输机理已成为未来光网络面临的重大挑战。本项目创新性地提出一种基于少模光纤的多维复用高频谱效率光传输机制，利用不同模式作为相互独立的信道传输多路信号，同时兼容密集波分复用和偏振复用技术，提升光传输的系统容量和频谱效率。本项目从少模光纤设计与制备、相干接收到多维复用光传输系统实验三个方面展开研究，研制能够支持传输包括基模在内的4个模式，具有低模间耦合、大群时延和有效面积的少模光纤。利用少模光纤，一路模式信道承载多维复用高速信号，另一路模式信道传输本振光，实现多维复用高速信号非本振相干接收。利用光学MIMO技术和频谱整形理论均衡模式信道串扰和信号传输损伤，最终在25GHz波长信道间隔条件下，实现4波长多维复用100Gbps QPSK信号在100公里少模光纤上无误码光传输，频谱效率达到16bit/s/Hz。

中文关键词： 少模光纤；光传输；多维复用；谱效率；编码

英文摘要： With the expansion of optical network scale, system capacity, various service, flexible applications, and diversified demands, it is quite challenging to seek novel ultra-high speed optical transmission mechanism for next-generation ultra-high speed, ultra-long distance, ultra-high capacity (3U) optical network. In this project, we innovatively propose a multi-dimension multiplexing based high spectral efficiency (SE) optical transmission mechanism using the few-mode fiber. Those various modes within the few-mode fiber can be treated as multiple independent transmission channels, while the proposed mode-division multiplexing (MDM) structure is compatible with the current dense wavelength-division multiplexing (DWDM) and polarization-division multiplexing (PDM) technique. Thus the proposed transmission mechanism can satisfy the ever-increasing bandwidth demand and drive the optical communication systems to higher capacities. This project will carry out a comprehensive investigation from the design and fabrication of the few-mode fiber, coherent receiver to multi-dimension multiplexing optical transmission experiment. The deliverable results include a new few-mode fiber with low mode coupling, large differential group delay (DGD) and large effective area, which can simultaneously support four-mode transmission wi

英文关键词： few-mode fiber；optic transmission；multi-dimentional multiplexing；spectral efficiency；coding