High spectral-efficiency,ultra-low MIMO SDM transmission over a field-deployed multi-core OAM fiber  

作　　者：JUNYI LIU SHUQIN MO ZENGQUAN XU YUMING HUANG YINING HUANG ZHENHUA LI YUYING GUO LEI SHEN SHUO XU RAN GAO CHENG DU QIAN FENG JIE LUO JIE LIU SIYUAN YU 

机构地区：[1]State Key Laboratory of Optoelectronic Materials and Technologies,School of Electronics and Information Technology,Sun Yat-sen University,Guangzhou 510006,China [2]Yangtze Optical Fibre and Cable Joint Stock Limited Company,State Key Laboratory of Optical Fibre and Cable Manufacture Technology,Wuhan 430074,China [3]School of Information and Electronics,Beijing Institute of Technology,Beijing 100081,China [4]Fiberhome Telecommunication Technologies Co.,Ltd.,Wuhan 430074,China [5]School of Electronics and Information Technology and Guangdong Provincial Key Laboratory of Optoelectronic Information Processing Chips and Systems,Sun Yat-sen University,Guangzhou 510006,China

出　　处：《Photonics Research》2025年第1期18-30,共13页光子学研究(英文版)

基　　金：National Key Research and Development Program of China(2019YFA0706300);National Natural Science Foundation of China(62335019,62475294).

摘　　要：Space-division multiplexing(SDM)systems based on few-mode multi-core fibers(FM-MCFs)utilize both spatial channels(fiber cores)and modes(optical modes per core)to maximize transmission capacity.Unlike laboratory FM-MCFs or field-deployed single-mode multi-core fibers(SM-MCFs),SDM transmissions over field-deployed FM-MCFs in outdoor settings have not been reported.Therefore,concerns remain that environmental interference and cabling stress could worsen inter-core and intra-core modal crosstalk and impact the performance of SDM systems over FM-MCFs.In this paper,we demonstrate successful bidirectional SDM transmission over a 5-km,field-deployed seven ring-core fiber(7-RCF)with a cladding diameter of 178μm.Our measurements show no significant differences in attenuation and mode coupling compared to pre-cabling conditions,confirming the fiber’s resilience to environmental disturbances and adaptability to cable deployment.Using the field-deployed 7-RCF,bi-directional SDM transmission is implemented,achieving spectral efficiency(SE)of 2×201.6 bit/(s Hz)which sets a new record in field-deployed fiber cables that is a tenfold increase over previous systems.Furthermore,these results were achieved using a small-scale 4×4 multiple-input multiple-output(MIMO)scheme with a time-domain equalization(TDE)tap number not exceeding 15.These results demonstrate the substantial potential of using SDM techniques to significantly enhance SE and expand capacity in practical fiber-optic transmission applications.

关 键 词：FIBER MIMO SDM 

分 类 号：TN929.11[电子电信—通信与信息系统]