January 01, 2019

How 64 GBaud optical carriers maximize the capacity in core elastic WDM networks with fewer transponders per Gb/s

  • Bertolini M.
  • Lavigne B.
  • Zami T.

Following the extensive investigations of the research community throughout the last 5 years regarding the transmission performance when roughly doubling the channel symbol rate in WDM systems from generic 32 GBaud to more than 60 GBaud, this evolution is about to become a reality in the field by the next 12 months. The common understanding is that it will reduce the cost per transmitted Gb/s, above all once the related faster optoelectronic interfaces will be mature enough. This paper refines this consideration by quantifying the related transponders saving per Gb/s on 3 distinct backbone WDM networks. In parallel, it reports how much extra network capacity stems from routing individual 64 GBaud subcarriers 75 GHz apart to serve connections capacity of which ranges from 100 Gb/s to 1 Tb/s. It eventually discusses the impact on the network performance when constraining the regenerators placement along the light paths of the accommodated services or when simplifying the elastic regenerators.

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© 1963-2012 IEEE. This article presents a packaged SiGe BiCMOS reflectometer for 0.01-26-GHz two-port vector network analyzers (VNAs). The reflectometer chip is composed of a resistive bridge coupler and two wideband heterodyne receivers for coherent magnitude and phase detection. In addition, a high-linearity receiver channel is designed to accommodate 20 ...

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The use of topology to protect quantum information is well-known to the condensed-matter community and, indeed, topological quantum computing is a bursting field of research and one of the competing avenues to demonstrate that quantum computers can complete certain problems that classical computers cannot. In photonics, however, we are only ...

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This paper takes a fresh look at the debate over the relationship between digital technology and productivity. The argument of economic historian Robert J. Gordon is that digital technology will not lead to increases in productivity such as we saw in the last century, based on his analysis of the ...