Unrepeatered transmission over 80km standard fibre at 40Gbit/s

Transmission of a 4*10Gbit/s optically time division multiplexed data signal over an unrepeatered link comprising 80km of standard non-dispersion shifted fibre is demonstrated. The 1300pns/nm dispersion of the link is balanced using a length of dispersion compensating fibre located at the OTDM transmitter, and the signal is demultiplexed to 10Gbit/s using a semiconductor optical amplifier.