基于概率成形和交织编码的少模光纤传输系统  

Few-Mode Fiber Transmission System Based on Probability Shaping and Interleaved Encoding

作　　者：毋桐 田凤[1] 杨雷静 Wu Tong;Tian Feng;Yang Leijing(School of Electronic Engineering,State Key Laboratory of Information Photonics and Optical Communication,Beijing Key Laboratory of Space-Round Interconnection and Convergence,Beijing University of Posts and Telecommunications,Beijing 100876,China)

机构地区：[1]北京邮电大学电子工程学院,信息光子学与光通信国家重点实验室,天地互联与融合北京市重点实验室,北京100876

出　　处：《光学学报》2022年第7期66-73,共8页Acta Optica Sinica

基　　金：国家重点研发计划(2018YFB1801001);国家自然科学基金(62021005,61875248,61727817)。

摘　　要：对于少模光纤的理论模型分析尚未完善,采用光纤段的位移和旋转理论建立了少模光纤信道模型,该模型综合考虑了模式串扰和差分模时延等因素。为了提高系统性能,研究了采用概率成形和交织编码对信号传输性能的影响。仿真结果表明,16阶QAM(Quadrature Amplitude Modul)信号经过长为50 km的少模光纤传输后,在前向纠错极限为3.8×10^(-3)的情况下,光信噪比需求降低了3 dB,而且有效提升了传输距离。The analysis of the theoretical model of few-mode fiber is not perfect.The channel model of few-mode fiber based on the theory of displacement and rotation of fiber segment is established,which takes into account the factors such as mode crosstalk and differential mode delay.In order to improve the system performance,the influence of probability shaping technology and interleaved encoding technology on signal transmission performance are studied.The simulation results show that after the 16-order QAM(Quadrature Amplitude Modul) signal is transmitted through a few-mode fiber with a length of 50 km,when the forward error correction limit is 3.8×10^(-3),the optical signal-to-noise ratio is reduced by 3 dB,and the transmission distance is effectively improved.

关 键 词：光通信 少模光纤 模式串扰 概率成形 交织编码 

分 类 号：TN29[电子电信—物理电子学]