articleJournal of Lightwave TechnologyDec 17, 2015Closed access

Rate Adaptation and Reach Increase by Probabilistically Shaped 64-QAM: An Experimental Demonstration

FBFred BuchaliFSFabian SteinerGBGeorg BöchererLSLaurent SchmalenPSPatrick Schulte

Alcatel Lucent (Germany) · Technical University of Munich · +1 more institution

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Abstract

A transmission system with adjustable data rate for single-carrier coherent optical transmission is proposed, which enables high-speed transmission close to the Shannon limit. The proposed system is based on probabilistically shaped 64-QAM modulation formats. Adjustable shaping is combined with a fixed-QAM modulation and a fixed forward-error correction code to realize a system with adjustable net data rate that can operate over a large reach range. At the transmitter, an adjustable distribution matcher performs the shaping. At the receiver, an inverse distribution matcher is used. Probabilistic shaping is implemented into a coherent optical transmission system for 64-QAM at 32 Gbaud to realize adjustable…

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Topics & keywords

Topics
Keywords
  • Quadrature amplitude modulation
  • QAM
  • Transmission (telecommunications)
  • Electronic engineering
  • Transmitter
  • Computer science
  • Modulation (music)
  • Data transmission
UN Sustainable Development Goals
  • Affordable and clean energy
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