A review of optical frequency division multiplexing (FDM) network technologies, this work offers complete coverage of this field, from optical devices to network architecture, design and operation. The book presents a background to the history of lightwave technology for communications, and presents a comparison of optical FDM network technologies and the time division multiplexing (TDM) scheme. It explains how optical FDM networks are achieved, and their consequent advantages. The book also presents an overview of the architecture and various components and subsystems of the optical FDM network, and concludes with practical chapters on optical FDM network design and management.