Title :
Overlapped-Subcarrier Multiplexing for WDM Passive Optical Networks: Experimental Verification and Mathematical Analysis
Author :
El-Sahn, Ziad A. ; Buset, Jonathan M. ; Plant, David V.
Author_Institution :
Electr. & Comput. Eng. Dept., McGill Univ., Montreal, QC, Canada
fDate :
3/1/2012 12:00:00 AM
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.
Keywords :
backscatter; mathematical analysis; passive optical networks; semiconductor optical amplifiers; wavelength division multiplexing; Rayleigh backscattering; WDM passive optical networks; bidirectional PON; mathematical analysis; optical network units; overlapped-subcarrier multiplexing; reflective semiconductor optical amplifier; single-feeder wavelength division multiplexed; spectrum usage; Bit error rate; Bit rate; Couplers; Downlink; Optical network units; Passive optical networks; Wavelength division multiplexing; Fiber-to-the-home (FTTH); passive optical networks (PONs); reflective semiconductor optical amplifiers (RSOAs); subcarrier multiplexing (SCM); wavelength-division multiplexing (WDM);
Journal_Title :
Lightwave Technology, Journal of
DOI :
10.1109/JLT.2011.2180510
