1 Tb per second speed achieved in optical technology trial using Probabilistic Constellation Shaping

1 Tb per second speed achieved in optical technology trial using Probabilistic Constellation Shaping

Probabilistic Constellation Shaping:

Optical fibers carry light waves.These light waves forms constellations or recognizable patterns that are arranged within the cable.These are created by carrier waves that are interacting with the signal.For fibre optic systems a laser diode (LD) or light-emitting diode (LED) is used.  Ideally these light sources provide stable, single frequency waves with sufficient power for long distance propagation.

These form patterns like grids .Legacy systems use all the dots in the pattern at a paralleled frequency. Researchers have identified a new modulation technique Probabilistic Constellation Shaping where  high amplitude is used  less frequently than those with lesser amplitude to transmit signals thus makes them more resilient to noise.Thereby,increasing the efficiency in the transmission.

Duesseldorf, Germany – Nokia Bell Labs, Deutsche Telekom T-Labs and the Technical University of Munich have achieved unprecedented transmission capacity and spectral efficiency in an optical communications field trial with a new modulation technique. The breakthrough research could extend the capability of optical networks to meet surging data traffic demands.

says resources from Nokia Networking coorporation.


This acheivement provides future scope to:

  • Provide greater flexibility and performance to enable optical networks .


  • Allow telecommunication indstries to maximize the distance and capacity of high speed data transmission in optical metro and core networks.
  • With 5G on demand this PCS could help 5g evolve in telecom industries says resources.



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