Long-haul WDM NRZ transmission at 10.7 Gb/s in S-band using cascade of lumped Raman amplifiers

We demonstrate the first S-band long-haul WDM transmission using a cascade of dispersion compensating lumped Raman amplifiers. Twenty NRZ channels, spanning the entire S-band, were transmitted over 10 spans of standard single-mode fiber (SSMF) (867 km) at 10.67 Gb/s, each achieving BER<10/sup -12/ without FEC.