Objetivo The main objective is to validate new concepts to achieve high speed (2.5 Gbit/s), high capacity (Tbit/s) switching systems needed for ATM based IBC optical networks. These concepts are applied to centralised switches for public and to decentralised switches for corporate networks. Supporting demonstrators are designed with advanced photonic technologies scaleable to real system dimensions and are tested in quasi-real traffic conditions, to provide a basis for the longer term objective of optimised switching systems.The main objective of the research was to validate new concepts for achieving the high speed (2.5 gigabytes per second) and high capacity switching systems needed for asynchronous transfer node (ATM) based integrated broadband communications (IBC) optical networks. These concepts are applied to centralized switches for the public network and to decentralized switches supporting metropolitan area network (MAN) services in corporate networks.The demonstrators are designed using technologies scaleable to real system dimensions and will be tested in quasi real traffic conditions to provide a sound basis for the longer term objective of optimized switching systems.The research has resulted in the following:performance requirements for ATM optical switches have been established;Modular switching systems have been established and analyzed;demonstrator architecture has been defined;specifications of building blocks have been issued;hardware implementation has started;the basic functionality of key building blocks has been demonstrated including wavelength switching at high speed (greater than 2.5 gigabytes per second) over 20 nm using wavelength conversion devices and buffering of high bit rate cells using 2 types of optical fibre memory (delay lines and loop);world state of the art performances on photonic switching devices have been achieved;wavelength tuneable lasers (50 nm) and high speed (greater than 2.5 gigabytes per second) wavelength converters have been tested;semiconductor optical amplifier gates have been operating at 2.5 gigabytes per second;polarization insensitive indium phosphide space switches have been tested;multifunction optoelectronic integrated circuit (OEIC) fast tuneable filters have been tested;polymeric space switches have been tested.Technical Approach The system concepts employ switch architectures using photonic techniques (space and wavelength switching for routing and multiplexing, time switching using optical fibre buffers to overcome the limitations of ATM electronic switches. These techniques are used where high operation speed and high throughput are required to perform cell routing, multiplexing and buffering. Use of electronics is reserved for the complex functionality of the switch, where speed is not a limiting factor, especially for control. The concepts are validated in experimental testbeds built from state-of-the-art photonic technology. Key Issues - Optical switching in ATM networks, requirements and evolutionary concepts and introduction strategies for optical switching systems, including ATM network-node interfaces and adapted information formats analysis.- Definition of multistage modular systems with appropriate interfaces, feasibility assessment of high-speed/high capacity modular multistage switches including traffic and optical performance evaluation, specification and test of elementary switching modules including electronic control.- Specification, design, realisation and test of functional blocks and subsystems.- Optimisation, fabrication and evaluation of the key photonic components' and ICs' performance for the sub-system functional blocks, with special attention to packaging and to complexity performance trade-off analysis. Expected Impact At the network and system levels, the main impact will be to provide the technological background, as well as viable solutions, for the introduction in the medium term (5-10 year objective) of high speed (greater than or equal to 2.5 Gbit/s) optical switching systems in the ATM based IBC. Ámbito científico natural scienceschemical sciencesinorganic chemistrypost-transition metalsengineering and technologyelectrical engineering, electronic engineering, information engineeringinformation engineeringtelecommunicationstelecommunications networksoptical networksnatural sciencesphysical scienceselectromagnetism and electronicssemiconductivitynatural sciencesphysical sciencesopticsfibre opticsnatural sciencesphysical sciencesopticslaser physics Programa(s) FP3-RACE 2 - Specific research and technological development programme (EEC) in the field of communication technologies, 1990-1994 Tema(s) Data not available Convocatoria de propuestas Data not available Régimen de financiación Data not available Coordinador ALCATEL ALSTHOM RECHERCHE Aportación de la UE Sin datos Dirección ROUTE DE NOZAY 91460 MARCOUSSIS Francia Ver en el mapa Coste total Sin datos Participantes (9) Ordenar alfabéticamente Ordenar por aportación de la UE Ampliar todo Contraer todo ASCOM TECH AG Suiza Aportación de la UE Sin datos Dirección BRENER TECHNOPARK MORGENSTRASSE 129 3018 BERN Ver en el mapa Coste total Sin datos Alcatel CIT SA Francia Aportación de la UE Sin datos Dirección 10 rue Latecoere 78141 Vélizy-Villacoublay Ver en el mapa Coste total Sin datos Alcatel SEL AG Alemania Aportación de la UE Sin datos Dirección Lorenzstraße 10 70435 Stuttgart Ver en el mapa Coste total Sin datos Centre National d'Études des Télécommunications (CNET) Francia Aportación de la UE Sin datos Dirección 196 avenue Henri Ravera 92220 Bagneux Ver en el mapa Coste total Sin datos Centro Studi e Laboratori Telecomunicazioni SpA (CSELT) Italia Aportación de la UE Sin datos Dirección Via Guglielmo Reiss Romoli 274 10148 Torino Ver en el mapa Coste total Sin datos EIDGENOSSISCHE TESCHNISCHE HOCHSCHULE Suiza Aportación de la UE Sin datos Dirección INSTITUTE FOR QUANTUM ELECTRONICS, ETH HONGGERBERG 8093 ZURICH Ver en el mapa Coste total Sin datos IMEC - UNIVERSITY OF GENT Bélgica Aportación de la UE Sin datos Dirección KAPELDREEF 75 3001 LEUVEN Ver en el mapa Coste total Sin datos TECHNICAL UNIVERSITY OF DENMARK Dinamarca Aportación de la UE Sin datos Dirección ELECTROMAGNETICS INSTITUTE, BUILDING 348 2800 LINGBY Ver en el mapa Coste total Sin datos THOMSON CSF LCR Francia Aportación de la UE Sin datos Dirección DOMAINE DE CORBEVILLE 91400 ORSAY Ver en el mapa Coste total Sin datos