2Tb/s (20×107 Gb/s) RZ-DQPSK straight-line transmission over 1005 km of standard single mode fiber (SSMF) without Raman amplification

By using only C-band EDFAs, we transmitted twenty 200-GHz spaced, 107 Gb/s RZ-DQPSK WDM channels over 1005 km of SSMF with realistically varying span lengths (80 to 100 km), and span losses from 16.5 to 20 dB (average 18.5 dB loss).