ZTE

ZTE Communications ›› 2012, Vol. 10 ›› Issue (1): 3-9.

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High Spectral Efficiency 400G Transmission

Xiang Zhou   

  1. AT&T Labs-Research, Middletown, NJ 07748, USA
  • Received:2011-11-29 Online:2012-03-25 Published:2012-03-25
  • About author:Xiang Zhou received his PhD degree in electrical engineering from Beijing University of Posts and Telecommunications in 1999. From 1999 to 2001, he was a research fellow at Nangang Technological University, Singapore. He conducted research on optical CDMA and wideband Raman amplification. Since October 2001, he has been a senior member of the technical staff at AT&T Labs-Research, working on aspects of long-haul optical transmission and photonic networking technologies. His areas of interest include Raman amplification, polarization-related impairments, optical power transient control, advanced modulation formats, and DSP at 100 Gb/s and beyond. He has authored or co-authorized more than 100 peer-reviewed journals and conference publications. He holds 28 patents in the US and is the associate editor ofOptics Express. He is member of the OSA and a senior member of IEEE.

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Abstract: This paper gives an overview of the generation and transmission of 450 Gb/s wavelength-division multiplexed (WDM) channels over the standard 50 GHz ITU-T grid at a net spectral efficiency (SE) of 8.4 b/s/Hz. The use of nearly ideal Nyquist pulse shaping, spectrally-efficient high-order modulation format, distributed Raman amplification, distributed compensation of ROADM filtering effects, coherent equalization, and high-coding gain forward error correction (FEC) code may enable future 400G systems to operate over the standard 50 GHz grid optical network.

Key words: spectral efficiency, optical, modulation format, coherent