More rigorous cross talk studies

  • Jeppesen, Palle (Project Manager)
  • Rasmussen, Christian Jørgen (Project Participant)
  • Liu, Fenghai (Project Participant)
  • Pedersen, Rune Johan Skullerud (Project Participant)

Project Details


The purpose of this research project is to obtain a more precise description of optical cross-talk in WDM networks. This means in particular better handling of cross-talk in network simulations, more precise calculation of cross-talk in cases where contributions have different powers and a better calculation of cross-talk from contributions that are partly correlated in phase (i.e. partly coherent cross-talk).
We have obtained experimental verification of a new model describing the influence of incomplete signal extinction ratio on the sensitivity degradation due to multiple interferometric cross-talk. Furthermore, it has been proven theoretically and experimentally that the cross-talk penalty depends not only of the total cross-talk power level but also on the number of cross-talk contributions.
During 1999 a Ph.D. project was completed on the development of a new optical network simulator that is capable of automatic reconfiguring its software according to various network environments; the simulator was used to among other things to calculate cross-talk penalties, also in cases with partly coherent cross-talk.
In a very recent activity interferometric cross-talk suppression has been demonstrated experimentally using polarization multiplexing technique and a semiconductor optical amplifier.
Effective start/end date01/01/199931/12/1999