On the limits of digital back-propagation in the presence of transceiver noise
On the limits of digital back-propagation in the presence of transceiver noise
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DOI：
10.1364/oe.25.004564
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发表时间：
2017-02-20
期刊：
影响因子：
3.8
通讯作者：
Bayvel, Polina
中科院分区：
文献类型：
--
作者：
Galdino, Lidia;Semrau, Daniel;Bayvel, Polina
本文研究了收发器噪声对数字反向传播（DBP）性能的影响。描述了在收发器噪声存在下使用DBP获得的估计信噪比（SNR）的一般表达式。这个新的表达式正确地解释了收发器噪声和光纤传输链路中的信号之间的非线性拍频。收发器噪声信号非线性拍频已被确定为DBP的预测和实际性能之间的差异的主要原因，这是以前没有建议。这种非线性拍频已被包括在GN模型中，允许分析预测实际系统中的DBP增益。实验和分裂步骤模拟和没有偏振模色散（PMD）的传输链路中进行了。结果表明，收发器噪声的影响远大于偏振模色散的影响，数值仿真验证了解析表达式的正确性。由The Optical Society根据Creative Commons Attribution 4.0 License条款发布。本作品的进一步分发必须保持作者和已发表文章的标题，期刊引用和DOI的归属。
This paper investigates the impact of transceiver noise on the performance of digital back-propagation (DBP). A generalized expression to estimate the signal-to-noise ratio (SNR) obtained using DBP in the presence of transceiver noise is described. This new expression correctly accounts for the nonlinear beating between the transceiver noise and the signal in the optical fiber transmission link. The transceiver noise-signal nonlinear beating has been identified as the main reason for the discrepancy between predicted and practical performance of DBP; which has not been previously suggested. This nonlinear beating has been included in the GN model, allowing DBP gains in practical systems to be predicted analytically. Experiments and split-step simulations with and without polarization-mode dispersion (PMD) in the transmission link have been performed. The results show that the impact of transceiver noise greatly outweighs that of PMD, and the analytical expressions are confirmed by the numerical simulations. Published by The Optical Society under the terms of the Creative Commons Attribution 4.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.