Goossens Jan-Willem, Yousefi Mansoor I, Jaouën Yves, Hafermann Hartmut
Opt Express. 2017 Oct 30;25(22):26437-26452. doi: 10.1364/OE.25.026437.
Polarization-division multiplexed (PDM) transmission based on the nonlinear Fourier transform (NFT) is proposed for optical fiber communication. The NFT algorithms are generalized from the scalar nonlinear Schrödinger equation for one polarization to the Manakov system for two polarizations. The transmission performance of the PDM nonlinear frequency-division multiplexing (NFDM) and PDM orthogonal frequency-division multiplexing (OFDM) are determined. It is shown that the transmission performance in terms of Q-factor is approximately the same in PDM-NFDM and single polarization NFDM at twice the data rate and that the polarization-mode dispersion does not seriously degrade system performance. Compared with PDM-OFDM, PDM-NFDM achieves a Q-factor gain of 6.4 dB. The theory can be generalized to multi-mode fibers in the strong coupling regime, paving the way for the application of the NFT to address the nonlinear effects in space-division multiplexing.
提出了基于非线性傅里叶变换（NFT）的偏振复用（PDM）传输用于光纤通信。NFT算法从单偏振的标量非线性薛定谔方程推广到双偏振的马纳科夫系统。确定了PDM非线性频分复用（NFDM）和PDM正交频分复用（OFDM）的传输性能。结果表明，在两倍数据速率下，PDM-NFDM和单偏振NFDM在Q因子方面的传输性能大致相同，并且偏振模色散不会严重降低系统性能。与PDM-OFDM相比，PDM-NFDM实现了6.4 dB的Q因子增益。该理论可推广到强耦合 regime 下的多模光纤，为应用NFT解决空分复用中的非线性效应铺平了道路。
