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Computer and Communication Networks, Second Edition by Nader F. Mir

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Chapter 15. All-Optical Networks, WDM, and GMPLS

Optical communication technology uses principles of light transmission in a glass medium, which can carry more information over longer distances than electrical signals can carry in a copper or coaxial medium. All-optical networks have been developed to meet two main objectives: reaching higher data transmission bandwidths and reducing the overall cost of backbone networks. This chapter focuses on principles of optical networks, wavelength-division multiplexing (WDM), and switching used in optical computer networks. Following are the major topics covered:

Overview of optical networks

Basic optical networking devices

Large-scale optical switches

Structure of optical cross connects (OXCs ...

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