面向片上光互连的无源H树网络设计  

Design of passive H-tree network for on-chip optical interconnection

作　　者：黄锦扬 蒋林 张岩[2] HUANG Jinyang;JIANG Lin;ZHANG Yan(School of Communication and Information Engineering,Xi′an University of Science and Technology,Xi′an,Shaanxi 710054,China;School of Electrical and Control Engineering,Xi′an University of Science and Technology,Xi′an,Shaanxi 710054,China)

机构地区：[1]西安科技大学通信与信息工程学院,陕西西安710054 [2]西安科技大学电气与控制工程学院,陕西西安710054

出　　处：《光电子．激光》2022年第6期569-577,共9页Journal of Optoelectronics·Laser

基　　金：国家自然科学基金(61772417,61834005,61802304,61602377);榆林市科技计划项目(CXY-2020-026)资助项目。

摘　　要：传统的片上电互连已无法满足多核处理系统日益增长的通信需求,在延迟、能耗和带宽方面更具优势的片上光互连逐渐引起关注。为了降低片上光网络(optical network-on-chip,ONoC)硬件开销和提升光网络性能,本文提出一种基于微环谐振器的16端口无源H树光互连网络。利用宽带微环谐振器设计4组转向光路由器,降低微环谐振器使用并完成端口选择,将信号传输到8端口接收光路由器以及3级和4级光开关来满足信号的无争用传输。实验结果表明,在16×16阵列规模下与Crossbar、λ-Router、GWOR、LACE、Light等无源网络结构相比,无源光H树网络仅需使用72个微环谐振器。网络平均插入损耗1.49 dB,与λ-Router、GWOR、TAONoC相比分别降低了21.5%、10.7%、59.7%,各路径平均信噪比为17.48 dB,与λ-Router、GWOR、Light相比分别提高了38.5%、36.0%、17.1%。Traditional on-chip electrical interconnection has been unable to meet the increasing communication demands of multi-core processing systems.On-chip optical interconnection,which has advantages in terms of delay,energy consumption,and bandwidth,has gradually attracted attention.In order to reduce the hardware overhead of optical network-on-chip(ONoC)and improve the performance of the optical network,this paper proposes a 16-port passive H-tree optical interconnection network based on a microring resonator.The broadband micro-ring resonators is used to design 4 sets of steering optical routers,the use of micro-ring resonators is reduced and port selection is completed,and signals is transmitted to 8-port receiving optical routers and 3-level and 4-level optical switches to meet the contention-free transmission of signals.The experimental results show that compared with passive network structures such as Crossbar,λ-Router,GWOR,LACE,and Light,the passive optical H-tree network only needs 72 microring resonators at the 16×16 array scale.The average network insertion loss is 1.49 dB,which is reduced by 21.5%,10.7%,and 59.7%respectively compared withλ-Router,GWOR,and TAONoC.The average signal-to-noise ratio of each path reaches 17.48 dB,which is compared withλ-Router,GWOR,and Light respectively,increased by 38.5%,36.0%,and 17.1%.

关 键 词：片上光互连 无源网络 光路由器 微环谐振器 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]