Abstract
An innovative overlapped-subcarrier multiplexing (O-SCM) technique is
proposed for single-feeder wavelength-division multiplexed (WDM) passive
optical networks (PONs). Allowing a certain amount of spectral overlap
between the uplink and the downlink maximizes the spectrum usage of
bandwidth-limited reflective semiconductor optical amplifier (RSOA)-based
optical network units (ONUs), while reducing the effect of Rayleigh
backscattering. In this paper, we report successful experimental
demonstrations up to 2.5 Gb/s symmetrical bit rates over a ~20 km
bidirectional PON, using a ~2 GHz bandwidth RSOA.
Moreover, we mathematically address the major design issues and tradeoffs.
Our simulation results show good agreement with the experiment.
© 2011 IEEE
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