Integrated sensing and communication in an optical fibre  

作　　者：Haijun He Lin Jiang Yan Pan Anlin Yi Xihua Zou Wei Pan Alan E.Willner Xinyu Fan Zuyuan He Lianshan Yan 

机构地区：[1]Center for Information Photonics&Communications,School of Information Science and Technology,Southwest Jiaotong University,611756 Chengdu,Sichuan,China [2]Peng Cheng Laboratory,518052 Shenzhen,China [3]Optical Fiber Communications Laboratory,University of Southern California,Los Angeles,CA 90089,USA [4]State Key Laboratory of Advanced Optical Communication Systems and Networks,Shanghai Jiao Tong University,200240 Shanghai,China

出　　处：《Light(Science & Applications)》2023年第5期729-742,共14页光（科学与应用)（英文版）

基　　金：supported by the National Key Research and Development Program of China(2019YFB1803500);the National Natural Science Foundation of China(NSFC)(61735015,61860206006,62205275,62005228).

摘　　要：The integration of high-speed optical communication and distributed sensing could bring intelligent functionalities to ubiquitous optical fibre networks,such as urban structure imaging,ocean seismic detection,and safety monitoring of underground embedded pipelines.This work demonstrates a scheme of integrated sensing and communication in an optical fibre(ISAC-OF)using the same wavelength channel for simultaneous data transmission and distributed vibration sensing.The scheme not only extends the intelligent functionality for optical fibre communication system,but also improves its transmission performance.A periodic linear frequency modulation(LFM)light is generated to act as the optical carrier and sensing probe in PAM4 signal transmission and phase-sensitive optical time-domain reflectometry(Φ-OTDR),respectively.After a 24.5 km fibre transmission,the forward PAM4 signal and the carriercorrespondence Rayleigh backscattering signal are detected and demodulated.Experimental results show that the integrated solution achieves better transmission performance(~1.3 dB improvement)and a larger launching power(7 dB enhancement)at a 56 Gbit/s bit rate compared to a conventional PAM4 signal transmission.Meanwhile,a 4m spatial resolution,4.32-nε/√Hz strain resolution,and over 21 kHz frequency response for the vibration sensing are obtained.The proposed solution offers a new path to further explore the potential of existing or future fibre-optic networks by the convergence of data transmission and status sensing.In addition,such a scheme of using shared spectrum in communication and distributed optical fibre sensing may be used to measure non-linear parameters in coherent optical communications,offering possible benefits for data transmission.

关 键 词：COMMUNICATION OPTICAL FIBRE 

分 类 号：TN92[电子电信—通信与信息系统]