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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 19, Iss. 27 — Dec. 19, 2011
  • pp: 26198–26207

Experimental demonstration of improved fiber nonlinearity tolerance for unique-word DFT-spread OFDM systems

Xi Chen, An Li, Guanjun Gao, and William Shieh  »View Author Affiliations

Optics Express, Vol. 19, Issue 27, pp. 26198-26207 (2011)

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In this paper we experimentally demonstrate transmission performance of optical DFT-spread OFDM systems in comparison with conventional OFDM systems. A 440.8-Gb/s superchannel consisting of 8 x 55.1-Gb/s densely-spaced DFT-S OFDM signal is successfully received after 1120-km transmission with a spectral efficiency of 3.5 b/s/Hz. It is shown that DFT-S OFDM can achieve an improvement of 1 dB in Q factor and 1 dB in launch power over conventional OFDM. Additionally, unique word aided phase estimation algorithm is proposed and demonstrated enabling extremely long OFDM symbol transmission.

© 2011 OSA

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

ToC Category:
Fiber Optics and Optical Communications

Original Manuscript: August 25, 2011
Revised Manuscript: October 16, 2011
Manuscript Accepted: October 29, 2011
Published: December 8, 2011

Xi Chen, An Li, Guanjun Gao, and William Shieh, "Experimental demonstration of improved fiber nonlinearity tolerance for unique-word DFT-spread OFDM systems," Opt. Express 19, 26198-26207 (2011)

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