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

Xi Chen | Zendy; An Li | Zendy; Guanjun Gao | Zendy; William Shieh | Zendy

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

Author(s) -

Xi Chen,

An Li,

Guanjun Gao,

William Shieh

Publication year - 2011

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.19.026198

Subject(s) - orthogonal frequency division multiplexing , transmission (telecommunications) , optics , computer science , spectral efficiency , electronic engineering , spectral density , nonlinear system , optical fiber , telecommunications , physics , channel (broadcasting) , engineering , quantum mechanics

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.

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