带宽可变的硅基模式-波长选择光开关机理及实现

Over the last few decades, the explosive and exponential network traffic growths have been sustained by the rapid deployment of wavelength-division multiplexing (WDM) technologies. Due to the continuing trend of exponential traffic growth which is driven by data centers and emerging new services, a new generation of networking technologies is desired. Space-domain multiplexing (SDM) in which multiple optical signals are carried in multiple modes offers a promising solution to meet future capacity demands. Mode (de)multiplexer is one of the key elements for realizing WDM-SDM optical networks. However, as optical networks develop toward intelligence, reconfiguration, elasticity, and economy, a high-performance mode-division multiplexing in WDM-SDM optical networks is challenged. To meet such a challenge, this project will propose a monolithic mode (de)multiplexer based on cascaded asymmetric Y junctions in silicon photonics, then study transmission characteristics of the proposed mode (de)multiplexer and demonstrate the design for a 1×4 mode (de)multiplexer on SOI. The device will find its application in on-chip optical networks and the findings of this research will provide scientific support for our country to master key technologies of a new generation of optical networks.

在波分复用（WDM）技术为主流的现有光网络中引入空分复用（SDM）技术被视为解决带宽瓶颈问题的有效途径。模分复用/解复用器是构建WDM-SDM光网络的关键器件之一。本项目着重研制基于级联不对称Y分叉的模分复用/解复用器。具体内容包括：分析与优化模分复用/解复用器的传输特性；实现与验证模分复用/解复用器芯片。本项目所形成的研究成果可用以推动大容量片上光互连网络的发展，为我国掌握未来网络核心技术等新一代信息技术提供科学支持。

在波分复用（WDM）技术为主流的现有光网络中引入空分复用（SDM）技术被视为解决带宽瓶颈问题的有效途径。模分复用/解复用器是构建WDM-SDM光网络的关键器件之一。因此，本项目从未来平面集成的发展角度出发，优化设计基于级联不对称Y分叉的模分复用/解复用器，以此为基础仿真分析及实现基于级联不对称Y分叉的模分复用/解复用器，并采用电子束曝光、等离子体刻蚀等工艺研制与验证相应的器件。本项目所形成的研究成果为我国掌握下一代网络关键技术提供科学数据支持。此外，本项目对锥形渐变不对称耦合的模分复用/解复用器也进行探索研究，并采用商用的0.18 um CMOS兼容工艺加以制备与验证。另外，基于石墨烯材料是零带隙能带结构，具有优越的电学和光学特性，因此，在本项目实施过程中，课题组针对基于石墨烯的光子器件也开展了相关的基础研究工作，包括基于石墨烯等离子激元的光逻辑器件等。本项目实施期间，发表期刊论文共计5篇，其中SCI收录3篇，EI收录2篇；授权发明专利2项，申请发明专利2项；参与本项目的硕士研究生6人，目前均处于研究生在读。

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