Chaos synchronization of semiconductor lasers over 1040-km fiber relay transmission with hybrid amplification  

作　　者：LONGSHENG WANG JUNLI WANG YUSHAN WU YUEHUI SUN SONGSUI LI LIANSHAN YAN YUNCAI WANG ANBANG WANG 

机构地区：[1]Key Laboratory of Advanced Transducers and Intelligent Control System,Ministry of Education,Taiyuan 030024,China [2]College of Physics and Optoelectronics,Taiyuan University of Technology,Taiyuan 030024,China [3]School of Information Engineering,Guangdong University of Technology,Guangzhou 510006,China [4]Guangdong Provincial Key Laboratory of Photonics Information Technology,Guangzhou 510006,China [5]Center for Information Photonics&Communications,School of Information Science and Technology,Southwest Jiaotong University,Chengdu 610031,China

出　　处：《Photonics Research》2023年第6期953-960,共8页光子学研究（英文版）

基　　金：National Key Research and Development Program of China(2019YFB1803500);National Natural Science Foundation of China(62035009,61731014);Shanxia“1331 Project”Key Innovative Team;International Cooperation of Key R&D Program of Shanxi Province(201903D421012);Development Fund in Science and Technology of Shanxi Province(YDZJSX2021A009)。

摘　　要：Optical chaos communication and key distribution have been extensively demonstrated with high-speed advantage but only within the metropolitan-area network range of which the transmission distance is restricted to around 300 km.For secure-transmission requirement of the backbone fiber link,the critical threshold is to realize long-reach chaos synchronization.Here,we propose and demonstrate a scheme of long-reach chaos synchronization using fiber relay transmission with hybrid amplification of an erbium-doped fiber amplifier(EDFA)and a distributed fiber Raman amplifier(DFRA).Experiments and simulations show that the hybrid amplification extends the chaos-fidelity transmission distance thanks to that the low-noise DFRA suppresses the amplified spontaneous emission noise and self-phase modulation.Optimizations of the hybrid-relay conditions are studied,including launching power,gain ratio of DFRA to EDFA,single-span fiber length,and number of fiber span.A 1040-km chaos synchronization with a synchronization coefficient beyond 0.90 is experimentally achieved,which underlies the backbone network-oriented optical chaos communication and key distribution.

关 键 词：synchronization FIBER AMPLIFIER 

分 类 号：TN248.4[电子电信—物理电子学]