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首页> 外文期刊>Lightwave Technology, Journal of >Demonstration of Phase-Conjugated Subcarrier Coding for Fiber Nonlinearity Compensation in CO-OFDM Transmission
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Demonstration of Phase-Conjugated Subcarrier Coding for Fiber Nonlinearity Compensation in CO-OFDM Transmission

机译：CO-OFDM传输中用于光纤非线性补偿的相位共轭子载波编码的演示

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摘要

In this paper, we demonstrate through computer simulation and experiment a novel subcarrier coding scheme combined with pre-electrical dispersion compensation (pre-EDC) for fiber nonlinearity mitigation in coherent optical orthogonal frequency division multiplexing (CO-OFDM) systems. As the frequency spacing in CO-OFDM systems is usually small (tens of MHz), neighbouring subcarriers tend to experience correlated nonlinear distortions after propagation over a fiber link. As a consequence, nonlinearity mitigation can be achieved by encoding and processing neighbouring OFDM subcarriers simultaneously. Herein, we propose to adopt the concept of dual phase conjugated twin wave for CO-OFDM transmission. Simulation and experimental results show that this simple technique combined with 50% pre-EDC can effectively offer up to 1.5 and 0.8 dB performance gains in CO-OFDM systems with BPSK and QPSK modulation formats, respectively.
机译：在本文中，我们通过计算机仿真和实验演示了一种相干光正交频分复用（CO-OFDM）系统中结合电前色散补偿（pre-EDC）的新型子载波编码方案，用于缓解光纤非线性。由于CO-OFDM系统中的频率间隔通常很小（数十MHz），因此相邻子载波在通过光纤链路传播后往往会经历相关的非线性失真。结果，可以通过同时编码和处理相邻的OFDM子载波来实现非线性减轻。在此，我们建议采用双相位共轭双波的概念进行CO-OFDM传输。仿真和实验结果表明，这种简单的技术与50％的pre-EDC结合可以分别在具有BPSK和QPSK调制格式的CO-OFDM系统中有效地提供高达1.5和0.8dB的性能提升。

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