High-Spectral-Efficiency Optical Modulation Formats

Author

Winzer, Peter J.

Author_Institution

Bell Labs., Alcatel-Lucent, Holmdel, NJ, USA

Volume

30

Issue

24

fYear

2012

Firstpage

3824

Lastpage

3835

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.

Keywords

channel capacity; optical communication equipment; optical design techniques; optical modulation; quadrature amplitude modulation; quadrature phase shift keying; transponders; wavelength division multiplexing; PDM-QPSK; aggregate WDM capacities; aggregate wavelength-division multiplexed capacities; bit rate 100 Gbit/s; coherent higher-order QAM transponders; digital coherent systems; high-spectral-efficiency optical modulation formats; high-spectral-efficiency quadrature amplitude modulation; per-channel interface rates; polarization-division multiplexed quadrature phase shift keying; technological scaling; Coherence; Digital signal processing; Modulation; OFDM; Quadrature amplitude modulation; Wavelength division multiplexing; Coding; DSP; FEC; PDM; QAM; QPSK; SDM; WDM; coherent detection; digital signal processing; modulation;

fLanguage

English

Journal_Title

Lightwave Technology, Journal of

Publisher

ieee

ISSN

0733-8724

Type

jour

DOI

10.1109/JLT.2012.2212180

Filename

6280581