A method of implementing wavelength division multiplexed-passive optical ne
twork (WDM-PON) upstream channels based on spectral slicing with wavelength
-seeded travelling-wave reflective semiconductor optical amplifier (SOA) mo
dulators is described. A dense WDM comprising eight 1 nm slices, each modul
ated at a data rate of 1.25 Gbit/s are shown to operate over 25 km of stand
ard fibre with negligible crosstalk and < 1 dB dispersion penalty.