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The authors describe a linear bus wavelength-reused gigabit Wavelength-Division Multiplexing Passive Optical Network (WDM-PON) with multiple optical add-drop nodes. A commercially available reflective semiconductor optical amplifier-based WDM-PON has a sufficient power budget to provide multiple optical add/drop nodes in 16 WDM channels. Sixteen 1.25 Gb/s WDM channels are successfully transmitted over 20 km of single-mode fiber with four optical add/drop multiplexers, even with 32 dB reflection and chromatic dispersion in the link. Looking beyond the currently deployed time-division multiplexing Passive Optical Network (PON) with a 20 km reach and 1:32 split, Wavelength-Division Multiplexing PONs (WDM-PONs) with a higher data rate over 1.25 Gb/s have been developed.
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