10.83 Tb/s Over 800 Km Nonlinear Frequency Division Multiplexing WDM Transmission

被引:24
作者
Chen, Xinyu [1 ]
Fan, Xiansong [1 ]
Yang, Fan [1 ]
Zhang, Fan [1 ,2 ]
机构
[1] Peking Univ, Sch Elect, Frontiers Sci Ctr Nanooptoelect, State Key Lab Adv Opt Com Municat Syst & Networks, Beijing 100871, Peoples R China
[2] Peng Cheng Lab, Shenzhen 518055, Peoples R China
基金
国家重点研发计划; 中国国家自然科学基金;
关键词
Optical fiber polarization; Optical fiber dispersion; Wavelength division multiplexing; Optical fiber networks; Artificial neural networks; Modulation; Frequency division multiplexing; Neural network-based equalization; nonlinear fourier transform; nonlinear frequency division multiplexing; WDM systems; FOURIER-TRANSFORM; OPTICAL COMMUNICATIONS; DISCRETE EIGENVALUE; MODULATION; COMMUNICATION; COMPENSATION; DISPERSION; WAVES;
D O I
10.1109/JLT.2022.3177413
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
Nonlinear frequency division multiplexing (NFDM) transmission scheme has attracted great interest in optical fiber communication systems due to its potential for surpassing the Kerr nonlinearity limit. There have been very active studies on single-channel NFDM transmission systems recently. However, up to now, few experiments have validated the feasibility of applying NFDM into wavelength division multiplexing (WDM) optical communication systems toward high-capacity transmission for wideband coverage. Moreover, the overall performance of the NFDM system is restricted due to many challenges in theoretical design and practical implementation. Novel neural network-based equalization methods contribute to eliminating multi-dimensional crosstalk, hence prompting the NFDM system performance. In this article, we experimentally demonstrate a high-capacity NFDM-WDM transmission system enabled by the newly developed digital signal processing (DSP) algorithms. With data modulation on the continuous spectrum in nonlinear frequency domain, a 25-channel WDM system with polarization division multiplexing (PDM) 16-ary quadrature amplitude modulation (16-QAM) transmitting over 800 km standard single-mode fiber (SSMF) is successfully achieved. To mitigate the undesirable correlations between the nonlinear continuous spectral components, a nonlinear spectrum equalization scheme based on artificial neural network (ANN) is utilized in the receiver side DSP. Through this ANN-based spectrum equalization, a 0.63 dB Q(2)-factor gain is achieved compared to the conventional equalization scheme. A record transmission capacity of 10.83 Tb/s is achieved in a 25-channel WDM system over 800 km SSMF, with a remarkable single-channel line rate of 433.3 Gb/s. Our work reports the highest capacity NFDM-WDM transmission up to date and helps to further explore the inherent ability of NFDM to resist fiber channel nonlinearity.
引用
收藏
页码:5385 / 5394
页数:10
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