Design of LCoS-Based Twin 1×40 Wavelength Selective Switch  

作　　者：WANG Han LIU Maoqi FENG Zhenhua LIU Minghuan MAO Baiwei 

机构地区：[1]School of Optical and Electronic Information,Huazhong University of Science and Technology,Wuhan 430074,China [2]Wuhan National Laboratory for Optoelectronics,Huazhong Univer-sity of Science and Technology,Wuhan 430074,China [3]WDM System Department of Wireline Product R&D Institute,ZTE Corporation,Wuhan 430223,China [4]State Key Laboratory of Mobile Network and Mobile Multimedia Technology,Shenzhen 518055,China

出　　处：《ZTE Communications》2024年第4期18-28,共11页中兴通讯技术（英文版）

基　　金：This work was supported by ZTE Industry⁃University⁃Institute Coopera⁃tion Funds under Grant No.IA20230614004.

摘　　要：Wavelength selective switch(WSS)is the crucial component in the reconfigurable optical add/drop multiplexer(ROADM),which plays a pivotal role in the next-generation all-optical networks.We present a compact architecture of twin 1×40 liquid crystal on silicon(LCoS)-based WSS,which can be regarded as a 4f system in the wavelength direction and a 2f system in the switching direction.It is designed with theoretical analysis and simulation investigation.Polarization multiplexing is employed for two sources of twin WSS by polarization con-version before the common optical path.The WSS system attains a coupling efficacy exceeding 96%for 90%of the ports through simulation optimization.The 3 dB bandwidth can be achieved by more than 44 GHz at a 50 GHz grid for all 120 channels at all deflection ports.This work establishes a solid foundation for developing high-performance WSS with larger port counts.

关 键 词：wavelength selective switch(WSS) liquid crystal on silicon(LCoS) optical structure design insertion loss 

分 类 号：TN929.1[电子电信—通信与信息系统] TN256[电子电信—信息与通信工程]