The ability to provide a 55Mbit/s service to 33.5million PON subscribe
rs is described, using an 8-channel sequentially-pulsed 1555nm integra
ted multifrequency laser distributed to 4.3million WDM PON lines throu
gh five amplifier/splitter stages. The wavelength-encoded pulses were
modulated ar 440Mbit/s with an InGaAsP electroabsorption modulator. an
d then. after 20km transmission through singlemode fibre, they were de
multiplexed with an arrayed-waveguide grating router. Error-free trans
mission was achieved.