ALSO CALLED: Fibre, Fiber Optics, and Optical Networking DEFINITION: A reconfigurable optical add-drop multiplexer (ROADM) is a device that can add, block, pass or redirect modulated infrared (IR) and visible light beams of various wavelengths in a fiber opticnetwork. ROADMs are used in systems that employ wavelength
… Definition continues below.
WHITE PAPER:
Advances in optical networking are offering service providers the opportunity to re-engineer their core networks over the next several years.
Before the development of optical multiplexing devices such as ROADMs, signal routing in fiber optic networks was done by converting the IR or visible beams to electrical signals and routing those signals using conventional electronic switches. The rerouted electrical signals were then converted back into IR or visible beams.
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