Experimental demonstration of improved fiber nonlinearity tolerance for unique-word DFT-spread OFDM systems.
- 8 December 2011
- journal article
- Published by Optica Publishing Group in Optics Express
- Vol. 19 (27) , 26198-26207
- https://doi.org/10.1364/oe.19.026198
Abstract
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.Keywords
This publication has 12 references indexed in Scilit:
- OFDM for Flexible High-Speed Optical NetworksJournal of Lightwave Technology, 2011
- 448-Gb/s Reduced-Guard-Interval CO-OFDM Transmission Over 2000 km of Ultra-Large-Area Fiber and Five 80-GHz-Grid ROADMsJournal of Lightwave Technology, 2010
- Zero-overhead phase noise compensation via decision-directed phase equalizer for coherent optical OFDMOptics Express, 2010
- DFT-Spread OFDM for Fiber Nonlinearity MitigationIEEE Photonics Technology Letters, 2010
- Experimental investigation on the performance of closely spaced multi-carrier PDM-QPSK with digital coherent detectionOptics Express, 2009
- 1-Tb/s single-channel coherent optical OFDM transmission over 600-km SSMF fiber with subwavelength bandwidth accessOptics Express, 2009
- Laser Linewidth Tolerance of Decision-Aided Maximum Likelihood Phase Estimation in Coherent Optical $M$-ary PSK and QAM SystemsIEEE Photonics Technology Letters, 2009
- 121.9-Gb/s PDM-OFDM Transmission With 2-b/s/Hz Spectral Efficiency Over 1000 km of SSMFJournal of Lightwave Technology, 2009
- Phased-array cancellation of nonlinear FWM in coherent OFDM dispersive multi-span linksOptics Express, 2008
- Frequency domain equalization for single-carrier broadband wireless systemsIEEE Communications Magazine, 2002