Currently, the mainstream commercial 40G/100G WDM systems use a single carrier wave. However, on a 400 Gbit/s system, the baud rate doubles, which causes serious distortion of high-speed signals and unstable clocks. To solve these issues, existing 400G systems use multiple aggregated carrier waves, that is, multiple sub-carrier waves are aggregated to form a super channel.
Different from a 400G system with multiple aggregated carrier waves, a 400G WDM system with a single carrier wave requires only one optical transceiver system. Therefore, a 400G system with a single carrier wave features high integration, high availability, and low power consumption. At the same time, because only one carrier wave is used, the management and scheduling are easy. A 400G WDM system with a single carrier wave is a significant direction for the evolution of customers' network.
"In order to guide the evolution to the next-generation optical network,
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