6 x 144-Gb/s Nyquist-WDM PDM-64QAM Generation and Transmission on a 12-GHz WDM Grid Equipped With Nyquist-Band Pre-Equalization

被引：37

作者：

Dong, Ze ^{[1
]}

Li, Xinying ^{[2
]}

Yu, Jianjun ^{[2
,3
]}

Chi, Nan ^{[2
]}

机构：

[1] Georgia Inst Technol, Atlanta, GA 30332 USA

[2] Fudan Univ, Shanghai 200433, Peoples R China

[3] ZTE, Beijing 100191, Peoples R China

来源：

JOURNAL OF LIGHTWAVE TECHNOLOGY | 2012年 / 30卷 / 23期

关键词：

Coherent detection; Nyquist-band; Nyquist wavelength-division multiplexing; pre-equalization; signal transmission; spectral efficiency (SE); 64QAM; HIGH-SPEED;

D O I：

10.1109/JLT.2012.2226433

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：

The Nyquist wavelength-division-multiplexing technique (N-WDM) enables a solution to achieve high spectral efficiency (SE) in long-haul transmission systems. Compared to polarization-division-multiplexing (PDM) quadrature-phase-shift-keying modulation, multilevel modulation scheme such as PDM 64-ary quadrature amplitude modulation (64QAM) is much more sensitive to intrachannel noise and interchannel crosstalk caused by N-WDM. We experimentally demonstrated the generation and transmission of the 6 x 144-Gb/s N-WDM PDM-64QAM signal over 80-km single-mode fiber SMF-28 with erbium-doped-fiber-amplifier-only amplification. It achieved a net SE of 10 bits/s/Hz assuming 20% forward error correction overhead. This experiment was successfully enabled by digital-signal-processing (DSP) pre-equalization of transmitter-side impairments and DSP post-equalization of the channel and receiver-side impairments. Nyquist-band is considered in the pre-equalization to enhance the tolerance of the PDM-64QAM to the aggressive spectral shaping. The benefit from the proposed Nyquist-band pre-equalization scheme was also experimentally demonstrated.

引用

页码：3687 / 3692

页数：6

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