40 Gbit/s unrepeatered optical transmission over148 km by electrical time division multiplexing and demultiplexing

Using electrical time division multiplexing and demultiplexing, a transmission experiment at 40 Gbit/s, with NRZ signals over an unrepeatered link comprising 148 km of dispersion-shifted fibre, is demonstrated for the first time. A receiver sensitivity from –22.5 to –24.2 dBm was achieved.