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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 22, Iss. 15 — Jul. 28, 2014
  • pp: 18770–18777

Digital subcarrier multiplexing for fiber nonlinearity mitigation in coherent optical communication systems

Meng Qiu, Qunbi Zhuge, Mathieu Chagnon, Yuliang Gao, Xian Xu, Mohamed Morsy-Osman, and David V. Plant  »View Author Affiliations

Optics Express, Vol. 22, Issue 15, pp. 18770-18777 (2014)

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In this work we experimentally investigate the improved intra-channel fiber nonlinearity tolerance of digital subcarrier multiplexed (SCM) signals in a single-channel coherent optical transmission system. The digital signal processing (DSP) for the generation and reception of the SCM signals is described. We show experimentally that the SCM signal with a nearly-optimum number of subcarriers can extend the maximum reach by 23% in a 24 GBaud DP-QPSK transmission with a BER threshold of 3.8 × 10−3 and by 8% in a 24 GBaud DP-16-QAM transmission with a BER threshold of 2 × 10−2. Moreover, we show by simulations that the improved performance of SCM signals is observed over a wide range of baud rates, further indicating the merits of SCM signals in baud-rate flexible agile transmissions and future high-speed optical transport systems.

© 2014 Optical Society of America

OCIS Codes
(060.1660) Fiber optics and optical communications : Coherent communications
(060.2330) Fiber optics and optical communications : Fiber optics communications

ToC Category:
Optical Communications

Original Manuscript: May 19, 2014
Revised Manuscript: July 7, 2014
Manuscript Accepted: July 9, 2014
Published: July 25, 2014

Meng Qiu, Qunbi Zhuge, Mathieu Chagnon, Yuliang Gao, Xian Xu, Mohamed Morsy-Osman, and David V. Plant, "Digital subcarrier multiplexing for fiber nonlinearity mitigation in coherent optical communication systems," Opt. Express 22, 18770-18777 (2014)

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