Demonstration of soliton transmission over more than 4000 km in fiber with loss periodically compensated by Raman gain

Abstract

By recirculating 55-psec soliton pulses (λs ~ 1600 nm) many times around a closed 42-km loop with loss exactly compensated by Raman gain (λp ~ 1497 nm), we have successfully demonstrated pulse transmission, without electronic regeneration, over distances in excess of 4000 km.