非线性补偿相干光纤传输系统的通信性能预测  

Communication performance prediction of nonlinear compensation coherent optical fiber transmission system

作　　者：闫慧文 易小刚 YAN Huiwen;YI Xiaogang(College of Physics and Optoelectronics,Taiyuan University of Technology,Taiyuan 030024,China)

机构地区：[1]太原理工大学物理与光电工程学院,太原030024

出　　处：《光通信技术》2020年第12期11-15,共5页Optical Communication Technology

基　　金：国家自然科学基金(批准号:61475112)资助。

摘　　要：对于完全补偿了信号-信号间非线性相互作用的相干光纤传输系统,系统的通信性能主要受到非线性信号-噪声间相互作用(NSNI)的限制。提出了全阶NSNI的理论模型,以速率为256 Gb/s、调制格式为基于偏振复用的16阶正交振幅调制(16QAM)信号的奈奎斯特光传输系统为例,对全阶NSNI模型进行了验证。实验结果表明:仅考虑一阶和二阶NSNI效应会高估系统的通信性能,全阶NSNI模型则能较准确地反映NSNI效应对系统的影响。For a coherent optical fiber transmission system that fully compensates for the signal-signal nonlinear interaction,the communication performance of the system is mainly limited by the nonlinear signal-noise interaction(NSNI).The theoretical mod-el of the full-order NSNI is proposed,and the full-order NSNI model is verified by taking a Nyquist optical transmission system with a rate of 256 Gb/s and a 16-order quadrature amplitude modulation(16QAM)signal based on polarization multiplexing as an example.The experimental results show that only considering the first-order and second-order NSNI effects will overestimate the communication performance of the system,while the full-order NSNI model can more accurately reflect the influence of the NSNI effect on the system.

关 键 词：相干光通信 非线性补偿 数字后向传输算法 非线性信号-噪声相互作用 信噪比 

分 类 号：TN913.7[电子电信—通信与信息系统]