Qian Cao 1,2Zhou Tong 2Lei Liu 2Jialiang Wang 2,*[ ... ]Youzhen Gui 2,4,**
Author Affiliations
1 Key Laboratory of Specialty Fiber Optics and Optical Access Networks, School of Communication and Information Engineering, Shanghai University, Shanghai 200444, China
2 Key Laboratory for Quantum Optics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
3 Key Laboratory of Space Laser Communication and Detection Technology, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
4 Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
We demonstrate a simultaneous transmission of time-frequency and data over a 160-km urban business network in Shanghai. The signals are transmitted through a cascaded optical link consisting of 48 km and 32 km, which are connected by an optical relay. The metrological signals are inserted into the communication network using dense wavelength division multiplexing. The influence of the interference between different signals has been discussed. The experimental results demonstrate that the radio frequency (RF) instability can reach 2.1×10-14 at 1 s and 2.3×10-17 at 10,000 s, and the time interval transfer of one pulse per second (1 PPS) signal with less than 10 ps at 1 s is obtained. This work paves the way for the widespread dissemination of ultra-stable time and frequency signals over the communication networks.
simultaneous transmission radio frequency transfer communication network wavelength multiplexing 
Chinese Optics Letters
2024, 22(1): 011201
空军工程大学信息与导航学院, 陕西 西安 710077
光通信 量子通信 模分复用 共纤同传 模式耦合 量子误码率 optical communications quantum communications mode division multiplexing simultaneous transmission sharing a same fiber mode coupling quantum bit error rate 
2020, 40(4): 0406002

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