10 Gbit/s alternate polarization soliton transmission over 300 km step-index fibre link with no in-line control

Error-free transmission over a 300 km step-index fibre link between Roma and Pomezia using a 10 Gbit/s stream of alternate-polarization solitons was performed. Standard 10 Gbit/s SDH line terminals were used at the transmitter and receiver sides. We report the longest propagation distance of 300 km obtained at 10 Gbit/s using conventional step-index fibre link without any dispersion compensating technique or inline signal control but only with optical amplification every 50 km.