基于波长和模式混合复用的片上光交换网络架构  

On-Chip Optical Switching Network Architecture Based on Hybrid Wavelength and Mode Division Multiplexing

作　　者：郭鹏星 周佳豪 侯维刚 郭磊[1,2] Guo Pengxing;Zhou Jiahao;Hou Weigang;Guo Lei(School of Communication and Information Engineering,Chongqing University of Posts and Telecommunications,Chongqing 400065,China;Institute of Intelligent Communication and Network Security,Chongqing University of Posts and Telecommunications,Chongqing 400065,China)

机构地区：[1]重庆邮电大学通信与信息工程学院,重庆400065 [2]重庆邮电大学智能通信与网络安全研究院,重庆400065

出　　处：《光学学报》2023年第13期160-170,共11页Acta Optica Sinica

基　　金：国家自然科学基金(62071076,62205043,62222103,62075024);重庆市自然科学基金(CSTB2022NSCQMSX1334);重庆市教委创新研究群体项目(CXQT21019)。

摘　　要：为有效地提高片上光交换网络的交换容量及规模,提出了一种基于波长和模式混合复用的无阻塞片上光交换网络架构。首先设计了基于微环谐振器的波长和模式混合复用的2×2光开关,并采用Benes拓扑互连成大规模无阻塞的交换网络。此外,通过设计波长和模式选择及复用模块,使所有节点间能够并行传输数据,并支持多播通信。为了验证所提观点,利用Ansys Lumerical仿真平台模拟了一个支持2种模式和4种波长混合复用的16×16光交换网络。仿真验证了所提交换网络能够实现所有节点间多维复用信号的并行数据交换,且16×16网络的最大插入损耗小于2.1 dB,模间串扰小于-18.4 dB,网络最大和最小插入损耗差值小于0.5 dB,证明该交换网络具有良好的公平性。最后将所提结构与传统的基于单波长单模式以及多波长单模式的光交换网络进行对比,证明了所提结构可以在不增加波长成本的情况下提升交换网络的容量及节点的规模。Objective Due to the limitation of electronic bottleneck,the traditional switching networks based on electrical devices are challenging to meet the needs of large-scale data exchange in the big data era.As an alternative,emerging silicon-based optical switching networks can effectively increase network capacity and reduce energy consumption.In addition,taking advantage of wavelength division multiplexing(WDM)or mode division multiplexing(MDM)technologies,multiple optical signals can be transmitted simultaneously in one optical link,effectively improving the optical interconnection density and communication bandwidth.However,the current optical switching network usually uses only WDM or MDM,which can only partially develop the parallel advantages of optics.Thus,we propose a novel on-chip optical switching network architecture based on hybrid wavelength and mode division multiplexing(WDM-MDM)technology.By inputting data of different wavelengths and modes into a single optical waveguide to achieve parallel transmission,the switching network's capacity multiplies.In addition,the proposed architecture enables data transmission between all nodes in parallel and supports multicast communication.The proposed architecture is expected to address the challenges of highcapacity switching requirements faced by data center networks by scaling the number of multiplexed wavelengths and modes.Methods We propose an on-chip optical switching network architecture(Fig.1)based on hybrid WDM-MDM technology.The architecture uses Benes topology as the core switching unit to achieve non-blocking features.Besides,we design a mode selection/multiplexing(MSM)module-based transmitting module[Figs.2(a)-2(b)].All nodes are divided into 2N groups at the transmitting module,with each containing W processor nodes.Each node is connected to a microring resonator(MRR)-based modulator array at the transmitter side to realize electro-optical conversion.The modulated optical signal is then transmitted to the MSM module.In the MSM module,one of the input

关 键 词：集成光学 片上光交换网络 无阻塞 微环谐振器 波长和模式混合复用 多播通信 

分 类 号：TN256[电子电信—物理电子学]