摘要
随着光纤通信与光纤传感技术的融合需求日益增长,单根光纤有望同时承担多种功能,而现有的单模光纤集成化系统面临非线性香农极限和不同功能信号之间相互干扰等挑战,难以同时稳定传输数字信号、模拟信号与传感信号。多芯光纤因其高集成度特性,展现出较大的应用潜力。为此,设计并表征了一种异质七芯光纤,旨在应对现有单模光纤集成化系统面临的挑战。该光纤的不同纤芯能够传输不同信号,针对不同功能纤芯,分别进行了优化设计,通过降低芯间串扰,实现了多功能信号的物理隔离,确保了数字信号、模拟信号和传感信号能够通过不同纤芯独立且互不干扰地进行高质量传输。实验结果表明,在1550 nm波长处,其数字信号传输芯可支持3个模式稳定传输,差分模式群时延为399 ps/km,传输容量是传统单模光纤的3倍;模拟信号传输芯具有相比于传统G.652D单模光纤更大的模场面积,达到93.14μm2,能够有效提升非线性容限;传感信号芯与其他纤芯串扰均低于-71 dB/km,可确保传感信号不受数字和模拟信号串扰影响,提升传感分辨率。该异质七芯光纤为下一代高集成度光纤提供技术支撑,有望应用于感传一体系统。
The growing integration requirements between optical fiber communication and sensing technologies necessitate optical fibers capable of performing multiple concurrent functions.However,conventional integrated systems utilizing singlemode fibers(SMF)encounter significant limitations,including the nonlinear Shannon limit and signal interference issues,which impede stable simultaneous transmission of digital,analog,and sensing signals.Multicore fibers demonstrate considerable potential for addressing these challenges through their enhanced integration density.This study presents the design and characterization of a heterogeneous sevencore fiber(Hetero7CF)developed to overcome the limitations of current SMF integrated systems.The fiber architecture enables different cores to transmit distinct signal types.Each core is specifically designed for its intended function.Through the reduction of intercore crosstalk,the design achieves physical isolation of multifunctional signals,enabling independent transmission of digital,analog,and sensing signals through separate cores without interference.Experimental results at 1550 nm wavelength demonstrate that the digital signal transmission core supports three modes with a differential mode group delay of 399 ps/km,while tripling the transmission capacity compared to conventional systems based on SMF.The analog signal transmission core exhibits an enhanced effective mode field area of 93.14µm²,exceeding that of traditional G.652D SMF,thereby improving nonlinear tolerance.The crosstalk between the sensing signal core and adjacent cores remains below−71 dB/km,preserving sensing resolution by preventing interference from digital and analog signals.This Hetero7CF design provides technical support for the nextgeneration highintegration optical fibers and is expected to be applied in integrated sensingcommunication systems.
作者
唐苗苗
王慧慧
王序涛
王彦泽
翟树荣
刘亚平
杨志群
沈磊
张磊
罗杰
黄战华
张林
Tang Miaomiao;Wang Huihui;Wang Xutao;Wang Yanze;Zhai Shurong;Liu Yaping;Yang Zhiqun;Shen Lei;Zhang Lei;Luo Jie;Huang Zhanhua;Zhang Lin(School of Precision Instrument and OptoElectronics Engineering,Tianjin University,Tianjin 300072,China;State Key Laboratory of Precision Measurement Technology and Instruments,Tianjin University,Tianjin 300072,China;State Key Laboratory of Optical Fiber and Cable Manufacture Technology,Yangtze Optical Fiber and Cable Joint Stock Limited Company(YOFC),Wuhan 430073,Hubei,China;Pengcheng Laboratory,Shenzhen 518038,Guangdong,China)
出处
《激光与光电子学进展》
北大核心
2025年第19期270-282,共13页
Laser & Optoelectronics Progress
基金
四川省重点研发计划(2025YFHZ0020)
国家自然科学基金(62405217)
天津市自然科学基金(23JCQNJC01580)。
关键词
感传一体
异质多芯光纤
光纤传感
光纤通信
integrated sensing and communication
heterogeneous multicore fiber
fiber sensing
fiber communication
