title: Digital non-linear equalization for flexible capacity ultradense WDM channels for metro core networking.
abstract: An experimental demonstration of Ultradense WDM with advanced digital signal processing is presented. The scheme proposed allows the use of independent tunable DFB lasers spaced at 12.5 GHz for ultradense WDM PM-QPSK flexible capacity channels for metro core networking. To allocate extremely closed carriers, we demonstrate that a digital non-linear equalization allow to mitigate inter-channel interference and improve overall system performance in terms of OSNR. Evaluation of the algorithm and comparison with an ultradense WDM system with coherent carriers generated from a single laser are also reported.
authors.affiliation: DTU Fotonik, Department of Photonics Engineering, Technical University of Denmark, DK-2800 Kgs. Lygnby, Denmark. vaar@fotonik.dtu.dk
authors.forename: Valeria
authors.initials: V
authors.lastname: Arlunno
authors.forename: Xu
authors.initials: X
authors.lastname: Zhang
authors.forename: Knud J
authors.initials: KJ
authors.lastname: Larsen
authors.forename: Darko
authors.initials: D
authors.lastname: Zibar
authors.forename: Idelfonso Tafur
authors.initials: IT
authors.lastname: Monroy