A Passive Optical Add Drop Multiplexer P Oadm For Wavelength Division Multiplexing System Wdm
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A Passive Optical Add/drop Multiplexer (P_OADM) for Wavelength Division Multiplexing System (WDM)
The revolutionary of optical networks is linked to Wavelength Division Multiplexing (WDM) to provide additional capacity on existing fibre. This creates a vision of an all-optical network where all management is carried out in the photonic layer. Optical Add/Drop Multiplexer (OADM) is one of the important components to realize the WDM technology for optical fibre communication systems. OADM functions as the optical sub-system to facilitate the evolution of the single wavelength point-to-point optical network to the WDM networks by selectively removing and reinserting individual channels, without having to regenerate all WDM channels. This thesis presents prototyping of a novel passive OADM called as Passive Optical Add/Drop Multiplexer (P _ OADM). This thesis describes the development, characterization and analysis of P _ OADM to be used in WDM system. Two types of P _ OADM have been studied; a P _ OADM with single channel drop system and a P _ OADM with dual channel drop system. The advantages of P _ OADM are lower loses, lower cost of production and easier to customise the channels to customers' demand. In this study thorough characterization on the components has been performed prior to system development and characterization. The most important parameters explored are functional test, insertion losses, crosstalk, return loss, and wavelength flexibility. The results testified that P _ OADM could be used for WDM system by dropping and adding the intended channel. The test result showed that the P _ OADM performed within the acceptable range. The insertion lost measured was at 8.28 dB for single channel input test and 10.30 dB for two channels input test. The crosstalk measured at the drop port was 19.90 dB and 20.32 dB at the output port and the return loss was 4.93 dB. The P _ OADM can be improved in term of insertion loss using circulator, or combiner but with slightly higher cost.
High Speed Networks and Multimedia Communications
Nowadays, networks and telecommunications are two of the most active ?elds. Research and development in these areas have been going on for some time, reaching the stage of products. The objectives of HSNMC 2004 (International Conference on High Speed Networks and Multimedia Communications) were to promote research and development activities and to encourage communication between academic researchers and engineers throughout the world in the areas related to high-speed networks and multimedia communications. The seventh edition of HSNMC was held in Toulouse, France, on June 30– July2,2004. Therewere266submissionstoHSNMCthisyearfrom34countries, which were evaluated by program committee members assisted by external - viewers. Each paper was reviewed by several reviewers. One hundred and one papers were selected to be included in these proceedings. The quality of s- missions was high, and the committee had to decline some papers worthy for publication. The papers selected in this book illustrate the state of the art, current d- cussions, and development trends in the areas of networks, telecommunication and multimedia applications. The contributions published in this book und- line the international importance of the related ?eld of research. They cover a variety of topics, such as QoS in Di?Serv networks, QoS analysis and m- surement, performance modelling, TCP modelling and analysis, MPLS for QoS provision, scheduling and resource allocation, routing, multicast, security and privacy issues, peer-to-peer applications, video applications, software and m- dleware for networks, mobile networks, mobility, satellite, mobile IP, wireless networks, WLAN, ad hoc networks, 3G/UMTS, IEEE 802.
Optical Code Division Multiple Access Communication Networks
Author: Hongxi Yin
language: en
Publisher: Springer Science & Business Media
Release Date: 2009-03-15
Optical code division multiple access (OCDMA) communication network technology will play an important role in future optical networks, such as optical access and metropolitan area networks. OCDMA technology can also be applied to implement optical signal multiplexing and label switching on backbone networks. Optical Code Division Multiple Access Communication Networks - Theory and Applications introduces the code theory of OCDMA, the methods and technologies of OCDMA encoding and decoding, the theory and methods of analyzing OCDMA systems with various receiver models and realizing multiple-class services with different bit rates and QoS. In addition, OCDMA network architectures, protocols and applications are discussed in detail. The up-to-date theoretical and experimental results on OCDMA systems and networks are also reported. A large number of encoding/decoding examples and many analysis and simulation results of code and system performances are given. It is a valuable text and/or reference book for postgraduates majoring in telecommunication and photonics to obtain a well-knit theoretical foundation and for engineers in R&D and management of optical communications. Dr. Yin is an Associate Professor of the School of Electronics Engineering and Computer Science at Peking University, China, and was a Visiting Research Fellow of Optoelectronics Research Centre (ORC) at University of Southampton, UK. Dr. Richardson is a Professor for optical communications and Deputy Director of ORC at University of Southampton, UK, and is responsible for much of the ORC's fiber related activities.