Abstract
This paper describes the design considerations and performance analysis for an
XG-PON Raman amplification scheme. The experimental results and theoretical calculations
presented in this paper demonstrate the feasibility of Raman amplification in O-band
access systems; thus, enhancing the performance of existing access installations while
still preserving the passive nature of these networks. With the availability of
cost-effective quantum dot laser diodes as high-power pumps, Raman amplification is
proving to be an attractive candidate for access applications. We experimentally
demonstrate that it is possible to achieve a total pump power of 759 mW using
polarization multiplexed quantum dot laser diodes (QD-LDs), and using a backward pumping
scheme we can support a purely passive XG-PON system with 50 km reach and 64 splits.
With system level numerical simulations, we illustrate the use of forward or
bi-directional pumping scheme to increase the splits further. We also confirm that the
Raman pump output in the experiments, despite being below the single mode cut off for
the standard SMF, was efficiently coupled into the trunk fibre using off-the-shelf
components. We also show using numerical simulations that a flat gain spectrum can be
obtained with less than 0.7 dB gain variation across the XG-PON upstream wavelength band
(1260–1280 nm) using a multi-wavelength pumping scheme with just two pump wavelengths.
From a detailed system analysis, we discuss the impact of broadband filtering (20 nm) at
the receiver adopted by the XG-PON standards, and show that lower class (N1) receivers
can be adopted for Raman gains higher than 16 dB.
© 2016 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