40 Gbit/s pseudo-linear transmission over one million kilometers

Abstract

Single-channel 40 Gbit/s pseudo-linear (non-soliton) transmission over 1000000 km of nonzero dispersion fiber is achieved using all-optical 2R regeneration and in-line synchronous modulation after every 400 km (4/spl times/100 km). Measured Q factors are better than 19 dB at several distances from 400 km to 1000000 km.