Multi-Rate (111-Gb/s, 2x43-Gb/s, and 8x10.7-Gb/s) Transmission at 50- GHz Channel Spacing over 1040-km Field-Deployed Fiber

Gb/s transmission combined with 2x43-Gb/s and 8x10.7-Gb/s on a 50-GHz grid over 1,040-km field fiber and two ROADMs is demonstrated, showing the feasibility of 100G overlaying existing 10G/40G commercial systems.