Abstract
We analyze the orthogonal frequency division multiplexing (OFDM) technique
in long-haul next generation optical communication links and compare it with
the well-established single-carrier (SC) data transmission using high-level
modulation formats and coherent detection. The analysis of the two
alternative solutions is carried out in the 100 Gbps scenario, which is
commonly considered to be the next upgrade of existing optical links, with
special emphasis on quaternary phase-shift keying (QPSK) modulations. The
comparison between OFDM and SC takes into account the main linear and
nonlinear impairments of the optical channel, e.g., group velocity
dispersion (GVD), polarization mode dispersion (PMD), self-phase modulation
(SPM), cross-phase modulation (XPM), and four-wave mixing (FWM), as well as
the phase noise due to transmit and receive lasers, their relative frequency
offset, other synchronization aspects, the overall complexity, the power and
spectral efficiency, and the technological constraints.
© 2010 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