JELE_V3_N3_RP1 Ramya S. Archana Journal on Electronics Engineering 2249 – 0760 3 3 1 5 WDM, ROADM, Wavelength Converters Optical Networks are data networks built on Fiber-Optics technology, which sends data digitally, as light through connected fiber strands.A reconfigurable optical add-drop multiplexer (ROADM) is a form of optical add-drop multiplexer that adds the ability to remotely switch traffic from a wavelength division multiplexing (WDM) system at the wavelength layer. In an optical packet network with optical packet switches interconnected with optical fibers running wavelength division multiplexing (WDM), packets are transmitted from source to destination without any optical-electrical-optical (O/E/O) conversion. The optical fiber entering an optical packet switch carries several wavelengths for packet transmission. March – May 2013 Copyright © 2013 i-manager publications. All rights reserved. i-manager Publications http://www.imanagerpublications.com/Article.aspx?ArticleId=2251