论文标题
基于二阶扰动理论的通道内非线性补偿
Intra-Channel Nonlinearity Compensation Based on Second-Order Perturbation Theory
论文作者
论文摘要
一阶（FO）扰动理论已被广泛研究以设计数字非线性补偿（NLC）技术，以处理连贯的光学通信系统中通道内纤维非线性效应。基于扰动理论的方法的主要优点是在整个纤维链路的一个阶段实现的可能性，每个符号操作一个样本。在本文中，我们建议将基于FO的FO扰动理论NLC（FO-PB-NLC）技术扩展到二阶（SO），称为SO-PB-NLC，以增强NLC的性能。我们为SO非线性失真场的推导提供了全面的理论分析，这是SO-PB-NLC技术的基础。通过数值模拟，与FO-PB-NLC技术相比，提出的SO-PB-NLC技术可显着提高NLC性能和最大传输范围。然后，将SO-PB-NLC技术的性能与基准数字后传播（DBP）的性能进行了比较。
The first-order (FO) perturbation theory has been widely investigated to design the digital nonlinearity compensation (NLC) technique to deal with the intra-channel fiber nonlinearity effect in coherent optical communication systems. The main advantages of the perturbation theory-based approach are the possibility of the implementation on a single stage for the entire fiber link and one sample per symbol operation. In this paper, we propose to extend the FO perturbation theory-based NLC (FO-PB-NLC) technique to the second-order (SO), referred to as the SO-PB-NLC, to enhance the NLC performance. We present a comprehensive theoretical analysis for the derivation of the SO nonlinear distortion field, which is the foundation for the SO-PB-NLC technique. Through numerical simulations, we show that the proposed SO-PB-NLC technique significantly enhances the NLC performance and the maximum transmission reach when compared to the FO-PB-NLC technique. Then, the performance of the SO-PB-NLC technique is compared with that of the benchmark digital back-propagation (DBP).
