Abstract
Dense wavelength-division multiplexing (DWDM) is a promising approach to design
ultrahigh-capacity fiber-optic communication systems (>50 Tb/s). However, DWDM
gives rise to severe physical impairments that adversely affect system performance. To
mitigate various physical impairments in DWDM systems and exploit their system capacity,
there is a need to develop a 2-D (time and wavelength) discrete-time input–output model
of physical impairments that can become the foundation of signal processing for optical
communications. This paper develops such a model based on the Volterra series transfer
function (VSTF) method. We overcome the well-known triple integral problem associated
with the VSTF method and reduce it to a simple integral. This model takes into account
multiple channel effects, fiber losses, frequency chirp, optical filtering, and
photodetection, which are ignored in the current literature. The model is in excellent
agreement with results obtained by split-step Fourier simulation. Furthermore, with this
model, we define coefficients that capture intersymbol interference, interchannel
interference, self-phase modulation, intrachannel cross-phase modulation (XPM),
intrachannel four-wave mixing (FWM), XPM, and FWM to characterize the impact of these
effects individually on the system performance. We also apply this model to analyze the
effects of varying system parameters and pulse shapes on the individual physical
impairments.
© 2011 IEEE
PDF Article
More Like This
Cited By
You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.
Contact your librarian or system administrator
or
Login to access Optica Member Subscription