Abstract

Cost-effective high-capacity WDM transmission systems are required to satisfy the need for increasing network capacity. The current progress of 40-Gb/s system technologies enabled us to achieve several-terabit capacity by a moderate number of channels. The wideband EDFAs, forward error correction, and distributed Raman amplification (DRA) plays important role in development of practical long-haul 40-Gb/s WDM systems. But in order to achieve further capacity, such as more than 10-Tb/s, much increase in optical bandwidth and signal spectral efficiency are inevitable because the capacity is determined by the product of these parameters.

© 2002 Optical Society of America