Abstract
As a parametric amplified noise, nonlinear phase noise limits the channel
capacity in multispan fiber-optics transmissions. In this paper, the reduction of
nonlinear phase noise by use of Wiener filtering is studied. Extracting signal from
time-domain concepts, parametric amplified noise covering signal spectrum in frequency
domain can be suppressed considerably. Timing jitter and ghost pulses due to
intrachannel nonlinearities can also be compensated. Nonparametric Wiener filtering is
used at the end of six configurations of dispersion compensation (DC) transmission
lines: pre- and postlumped DC, distributed DC without optical phase conjugation (OPC),
dispersion inversion (DI) about midlink OPC with, respectively, one-for-multispan,
single type span and alternate type span on each side of OPC. It is found that single-DI
and alternate-DI schemes have higher input power capacity than one-for-multi-DI scheme.
Further reductions in the nonlinear phase noise accumulation for all these DC maps are
obtained with Wiener filtering, and higher absolute dispersion can decrease signal
fluctuation due to nonlinear phase noise, as well.
© 2008 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
Add to BibSonomy