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Journal of Lightwave Technology

Journal of Lightwave Technology

| A JOINT IEEE/OSA PUBLICATION

  • Vol. 30, Iss. 23 — Dec. 1, 2012
  • pp: 3687–3692

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

Ze Dong, Xinying Li, Jianjun Yu, and Nan Chi

Journal of Lightwave Technology, Vol. 30, Issue 23, pp. 3687-3692 (2012)


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Abstract

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 × 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.

© 2012 IEEE

Citation
Ze Dong, Xinying Li, Jianjun Yu, and Nan Chi, "6 × 144-Gb/s Nyquist-WDM PDM-64QAM Generation and Transmission on a 12-GHz WDM Grid Equipped With Nyquist-Band Pre-Equalization," J. Lightwave Technol. 30, 3687-3692 (2012)
http://www.opticsinfobase.org/jlt/abstract.cfm?URI=jlt-30-23-3687


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