Obiettivo The main objective of this RTD project is the experimental realisation of an innovative laser based technique to encode information within a chaotic carrier. This novel technique profits from the intrinsic non-linearities present in nowadays high-speed telecommunication transmitter diode lasers. The technique explores the concept of synchronisation of two spatially separated chaotic laser systems, one being at the emitter side and the other at the receiver side of the telecommunication channel, with the goal of enhancing privacy in the transmission of codified data by encoding at device level. We explore techniques suitable for the implementation in high-speed fibre-based optical communication systems, with emphasis in designs that can take advantages of the already installed optical fibre networks. The system targets data transmission at Gbit/s. The main objective of this RTD project is the experimental realisation of an innovative laser based technique to encode information within a chaotic carrier. This novel technique profits from the intrinsic non-linearities present in nowadays high-speed telecommunication transmitter diode lasers. The technique explores the concept of synchronisation of two spatially separated chaotic laser systems, one being at the emitter side and the other at the receiver side of the telecommunication channel, with the goal of enhancing privacy in the transmission of codified data by encoding at device level. We explore techniques suitable for the implementation in high-speed fibre-based optical communication systems, with emphasis in designs that can take advantages of the already installed optical fibre networks. The system targets data transmission at Gbit/s.OBJECTIVESThe general objective of the proposal is the experimental demonstration of an emitter/receiver chaotic optical system capable to transmit encoded information through optical fibres. Our proposal is directed at improving the privacy in the transmission of secure data in the context of the increasing volumes of data that fibre-based optical networks carry. We concentrate on relatively high bit rate fibre-optic communication systems utilising semiconductor diode lasers as the optical sources. Our approach exploits the properties of the dynamically chaotic emitter and receiver systems that, under specific conditions are able to synchronise, and therefore allow for the encryption and decryption of messages at a device level. Our technique is complementary and fully compatible with other existing methods for encoding information.DESCRIPTION OF WORKThe methodology to be used will be based on a strong co-operation between theoretical modelling and experimental proofs. The work will progress as an integrated entity wherein experimental work is both interpreted and informed on the basis of detailed theoretical modelling and design work. The main work will be predicated on the use of state-of-the-art laser diodes and other optoelectronic and optical components thus underlining the inherent reliability of the proposed methodology.The main elements of the project can be summarised as:1) The utilisation of laboratory demonstrators for chaotic optical signal generators, both in power and wavelength, to effect synchronisation of emitter and receiver chaotic sub-systems. The experimental work will utilise edge-emitting laser diodes with the main effort given to the use of a suitable electro/optical and all optical nonlinearity for generation of optical chaos. Project work will be directed at demonstrating that such techniques can be achieved in a robust manner to permit practical deployment within a system demostrator;2) The demonstration of the effectiveness with which chaotic encoding can be used to achieve data transmission between synchronised chaotic emitters and receivers that are connected by an optical fibre. Evaluation of robustness and sensitivity of the different proposed schemes, with further development of the most suitable one;3) Establishing the integrity of the chaotic encoding technique. With a view towards a future development, the specification of monolithic chaotic emitter/receiver components will be defined incorporating outcomes of the analysis of alternative implementations. Campo scientifico engineering and technologyelectrical engineering, electronic engineering, information engineeringinformation engineeringtelecommunicationstelecommunications networksoptical networksnatural sciencesphysical scienceselectromagnetism and electronicssemiconductivitynatural sciencesphysical sciencesopticsfibre opticsnatural sciencesphysical sciencesopticslaser physics Programma(i) FP5-IST - Programme for research, technological development and demonstration on a "User-friendly information society, 1998-2002" Argomento(i) 1.1.2.-6.1.1 - FET O: Open domain Invito a presentare proposte Data not available Meccanismo di finanziamento CSC - Cost-sharing contracts Coordinatore UNIVERSITAT DE LES ILLES BALEARS Contributo UE Nessun dato Indirizzo CARRETERA DE VALLDEMOSSA KM 7.5 07071 PALMA DE MALLORCA Spagna Mostra sulla mappa Costo totale Nessun dato Partecipanti (6) Classifica in ordine alfabetico Classifica per Contributo UE Espandi tutto Riduci tutto CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE Francia Contributo UE Nessun dato Indirizzo 3, RUE MICHEL-ANGE 75794 PARIS CEDEX 16 Mostra sulla mappa Costo totale Nessun dato CONSEJO SUPERIOR DE INVESTIGACIONES CIENTIFICAS Spagna Contributo UE Nessun dato Indirizzo C/ SERRANO 117 28006 MADRID Mostra sulla mappa Costo totale Nessun dato NATIONAL AND KAPODISTRIAN UNIVERSITY OF ATHENS Grecia Contributo UE Nessun dato Indirizzo 30 PANEPISTIMIOU STR. 10679 ATHENS Mostra sulla mappa Costo totale Nessun dato TECHNISCHE UNIVERSITAET DARMSTADT Germania Contributo UE Nessun dato Indirizzo KAROLINENPLATZ 5 64289 DARMSTADT Mostra sulla mappa Costo totale Nessun dato UNIVERSITA DEGLI STUDI DI PAVIA Italia Contributo UE Nessun dato Indirizzo STRADA NUOVA 65 27100 PAVIA Mostra sulla mappa Costo totale Nessun dato UNIVERSITY OF WALES, BANGOR Regno Unito Contributo UE Nessun dato Indirizzo FINANCE OFFICE, UNIVERSITY OF WALES, BANGOR, COLLEGE ROAD LL57 2DG BANGOR Mostra sulla mappa Costo totale Nessun dato