ADD/DROP NODE FOR AN OPTICAL COMMUNICATIONS NETWORK

摘要

A 1550nm DWDM optical communications network has a 1300nm remote node added to which a small number of channels can be added or dropped. The additional node includes dual wavelength couplers to enable 1300nm wavelength signals to be added or dropped. The 1300nm signals are demultiplexed using a WDM filter and connected into the transponders of the 1550nm nodes for transportation around the node. Signals for the remote network are converted to 1300nm signals at the 1550nm node transponders and multiplexed onto the network to be dropped to the network node transponder.