High co-directional Raman gain for 200-km spans, enabling 40 x 10.66 Gb/s transmission over 2400 km

摘要

Using 200-km spans with 14.5-dB Raman co-gain, we transmitted 400 Gb/s error-free over 2400-km of TrueWave REACH fiber. With bidirectional Raman pumping, span lengths could be doubled, reducing operating expenses for medium- to long-haul systems.