Reconfigurable optical add-drop multiplexers for hybrid mode-/wavelength-division-multiplexing systems  

作　　者：Xiaolin Yi Weike Zhao Chenlei Li Long Zhang Yuluan Xiang Chaoyue Liu Yaocheng Shi Liu Liu Daoxin Dai 

机构地区：[1]Zhejiang University,College of Optical Science and Engineering,Center for Optical and Electromagnetic Research,International Research Center for Advanced Photonics,State Key Laboratory for Modern Optical Instrumentation,Hangzhou,China [2]Zhejiang University,Ningbo Research Institute,Ningbo,China [3]Zhejiang University,Jiaxing Research Institute,Intelligent Optics and Photonics Research Center,Jiaxing Key Laboratory of Photonic Sensing and Intelligent Imaging,Jiaxing,China

出　　处：《Advanced Photonics Nexus》2023年第6期30-39,共10页先进光子学通讯（英文）

基　　金：supported by the National Major Research and Development Program(Grant No.2019YFB2203600);the National Science Fund for Distinguished Young Scholars(Grant No.61725503);the National Natural Science Foundation of China(Grant Nos.62125503,91950205,61961146003,and 62005238);the Zhejiang Provincial Natural Science Foundation(Grant No.LD19F050001);The Fundamental Research Funds for the Central Universities;The Leading Innovative and Entrepreneur Team Introduction Program of Zhejiang(Grant No.2021R01001).

摘　　要：Dealing with the increase in data workloads and network complexity requires efficient selective manipulation of any channels in hybrid mode-/wavelength-division multiplexing(MDM/WDM)systems.A reconfigurable optical add-drop multiplexer(ROADM)using special modal field redistribution is proposed and demonstrated to enable the selective access of any mode-/wavelength-channels.With the assistance of the subwavelength grating structures,the launched modes are redistributed to be the supermodes localized at different regions of the multimode bus waveguide.Microring resonators are placed at the corresponding side of the bus waveguide to have specific evanescent coupling of the redistributed supermodes,so that any mode-/wavelength-channel can be added/dropped by thermally tuning the resonant wavelength.As an example,a ROADM for the case with three mode-channels is designed with low excess losses of<0.6,0.7,and 1.3 dB as well as low cross talks of<−26.3,−28.5,and−39.3 dB for the TE0,TE1,and TE2 modes,respectively,around the central wavelength of 1550 nm.The data transmission of 30 Gbps∕channel is also demonstrated successfully.The present ROADM provides a promising route for data switching/routing in hybrid MDM/WDM systems.

关 键 词：RECONFIGURABILITY hybrid multiplexing subwavelength grating silicon photonics 

分 类 号：TN9[电子电信—信息与通信工程]