多维复用无源光网络基础理论与关键技术研究

With the continued increase of network users and emergence of new network business, the capacity and the speed of broadband optical access network need to be improved significantly. Current passive optical network (PON) technologies based on time-division-multiplexing are unable to meet the demands of future access bandwidth and overall capacity. In this project, we apply the few-mode and multi-core optical fiber transmission theoris in the passive optical network, and investigate the fundamental theories and key technologies of multi-dimension-multiplexing PON by combining all the dimensions of modes, wavelengths, polarizations, time-slots and multi-level modulation formats, which can satisfy future demands of ultra-high-capacity optical access network. The project is to focus on some scientific problems for multi-dimension multiplexing optical access network, such as the multiplexing / demultiplexing scheme, theories of channel compensation mechanism, mode management mechanism and scalable strategy, network performance and structure. The researchers aim to demonstrate a hybrid optical access system which supports higher rate and larger splitting ratio multi-dimension access, thus to provide theoretical and technical support for next generation ultra-high-capacity multi-dimension multiplexing passive optical network.

随着网络用户的持续增加和新型网络业务的不断涌现，宽带光接入网的速度和支持用户数都面临数量级增长的需要。当前基于时分复用的无源光网络技术无法满足未来的接入带宽和总容量需求。本课题将少模和多芯光纤传输理论应用于无源光网络，提出基于少模多芯传输的空分复用接入概念，并针对未来超高容量光接入网络需求，综合模式、波长、时隙和多进制调制多维度复用技术，研究多维复用无源光网络的基础理论和关键技术。本课题重点研究多维复用光接入网复用/解复用方案与信道损伤补偿机制、多维复用光接入网模式管理机制与可扩展策略、多维复用光接入网网络性能与结构，最终建立多维复用混合光接入演示系统，支持更高速率，更大分光比的多维接入，为多维复用超高容量的下一代无源光网络的发展与应用提供理论与技术支撑。

无源光网络是推动当前我国三网融合政策的关键技术，其研究具有重要的科学和社会意义。本课题将空分复用光纤传输理论应用于无源光网络，综合模式、波长、时隙和多进制调制多维度复用技术，研究多维复用无源光网络的基础理论和关键技术。重点研究了多维复用光接入网的复用/解复用方案、演进策略、网络性能与结构，建立了多维复用混合光接入演示系统。重要突破包括：a. 提出并实验演示了MDM-WDM-TDM三维度复用的无源光网络体系结构，证明了多维接入网的平滑演进是可行的；实现了2模式弱耦合独立传输了120km少模光纤，是当前国际最好记录；实现了6模式环形纤芯弱耦合少模光纤，并完成了实验演示，是国际上支持弱耦合模式最多的少模光纤。在本项目资助下发表SCI检索论文31篇，其中特邀SCI期刊论文2篇；发表会议论文38篇，其中国际光通信顶级会议OFC会议14篇，CLEO会议1篇。