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Journal of Lightwave Technology

Journal of Lightwave Technology

| A JOINT IEEE/OSA PUBLICATION

  • Vol. 30, Iss. 24 — Dec. 15, 2012
  • pp: 3824–3835

High-Spectral-Efficiency Optical Modulation Formats

Peter J. Winzer

Journal of Lightwave Technology, Vol. 30, Issue 24, pp. 3824-3835 (2012)


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Abstract

As 100-Gb/s coherent systems based on polarization- division multiplexed quadrature phase shift keying (PDM-QPSK), with aggregate wavelength-division multiplexed (WDM) capacities close to 10 Tb/s, are getting widely deployed, the use of high-spectral-efficiency quadrature amplitude modulation (QAM) to increase both per-channel interface rates and aggregate WDM capacities is the next evolutionary step. In this paper we review high-spectral-efficiency optical modulation formats for use in digital coherent systems. We look at fundamental as well as at technological scaling trends and highlight important trade-offs pertaining to the design and performance of coherent higher-order QAM transponders.

© 2012 IEEE

Citation
Peter J. Winzer, "High-Spectral-Efficiency Optical Modulation Formats," J. Lightwave Technol. 30, 3824-3835 (2012)
http://www.opticsinfobase.org/jlt/abstract.cfm?URI=jlt-30-24-3824

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