title: Influence of self- and cross-phase modulation on 40 Gbaud dual polarization DQPSK/D8PSK signals in 10 Gbit/s OOK WDM systems.
abstract: This paper, for the first time, investigates the nonlinear degradation of 40 Gbaud single- and dual polarization RZ-DQPSK/D8PSK signals caused by SPM and XPM-induced crosstalk from neighboring 10 Gbit/s NRZ-OOK channels in an WDM upgrade scenario. The investigations were numerically and experimentally conducted over a 320 km transmission link with three different wavelength configurations to address the impact of the walk-off length. The paper also presents the first numerical analysis of the XPM dependence on the relative state of polarization of the D8PSK with respect to the neighbors.
authors.affiliation: Department of Microtechnology and Nanoscience (MC2), Photonics Laboratory, Chalmers University of Technology, SE–412 96 Gothenburg, Sweden. ekawit@chalmers.se
authors.forename: Ekawit
authors.initials: E
authors.lastname: Tipsuwannakul
authors.forename: Mohsan Niaz
authors.initials: MN
authors.lastname: Chughtai
authors.forename: Marco
authors.initials: M
authors.lastname: Forzati
authors.forename: Jonas
authors.initials: J
authors.lastname: Mårtensson
authors.forename: Peter
authors.initials: P
authors.lastname: Andrekson
authors.forename: Magnus
authors.initials: M
authors.lastname: Karlsson