904 km, 1.2 Gbit/s non-regenerative optical fibre transmission experiment using 12 Er-doped fibre amplifiers

Abstract

A non-regenerative optical fibre transmission experiment over 904 km is reported. With a total net optical gain of 203 dB obtained from 12 cascaded Er-doped fibre amplifiers, 1.2 Gbit/s directly intensity modulated optical signals were transmitted without any optical bandpass filters and without an error floor.