Objectif
- Fabrication of 1xN lossless splitters based on a succession of planar waveguide 3dB splitters, with the signal reduction from division being compensated by an amplification stage integrated on the waveguide substrate.
- Demonstration of active integrated planar waveguide devices. The lossless splitters will be realised in an integrated planar waveguide format for broadband optical networks operating around 1550nm. The aim is to use low-cost fabrication techniques to facilitate wide-scale deployment.
- Evaluation of lossless splitters for application in IBC optical networks. The results of trials and reliability tests will be used to evaluate the devices' potential.
The proposed devices will be suitable for application in the next generation of Fibre-In-The-Loop systems.
Fabrication of 1xN lossless splitters based on a succession of planar waveguide 3 dB splitters, has been studied with the signal reduction from division being compensated by an amplification stage integrated on the waveguide substrate, and the lossless splitters realized in an integrated planar waveguide format for broadband optical networks operating around 1550 nm. The substrates were made of 2 glasses, one undoped for the fabrication of the cascaded Y-branch splitter, and one erbium doped for the amplification function. The performance of the splitter function was thus optimized without introducing excessive loss due to the presence of erbium ions. Off the shelf 1480 nm and 980 nm laser diodes were used to pump the amplifier section. These were coupled via lengths of fibre. A folded and/or spiral amplifier configuration permitted the packing of several tens of cm of waveguide length into a few square cm of substrate area. The incorporation of grating filters and/or proximity couplers to remove unused pump light or to reflect it for improved absorption was studied. Monitor photo diodes were pigtailed to optical taps on the signal channel of the splitter, and used for electronic control of the gain and stabilization against thermal effects. Target specifications have been achieved for application in an analogue community antenna television (CATV) distribution network, an in an interactive narrowband digital local access network. A cost analysis for such architectures has been carried out with the main result being that for an analogue CATV network remote pumping of the device offers lower costs than local pumping. Erbium doped ion exchanged amplifiers, based on spectroscopic evaluation of potential hosts and extensive device modelling have been developed. A glass host has been selected with reasonable spectroscopic performance and a process developed to realize waveguides in this matrix. Dual glass wafers have been fabricated. Pumping possibilities for the device have been evaluated. Continuing improvements have been achieved in experimental amplifier performance, with 8 dB of net gain already realized in a non optimised convoluted 23 cm waveguide.
Technical Approach
The substrates are being made of two glasses, one undoped for the fabrication of the cascaded Y-branch splitter, and one erbium-doped for the amplification function. The performance of the splitter function can thus be optimised without introducing excessive loss due to the presence of erbium ions.
Off-the-shelf 1480 nm and 980 nm laser diodes, designed for use with EDFAs, are used to pump the amplifier section These are coupled via lengths of fibre. The possible advantages in terms of cost, reliability and operation of using several lower-power laser diodes rather than a single higher power one is considered. A folded and/or spiral amplifier configuration permits the packing of several tens of cm of waveguide length into a few square cm of substrate area. The incorporation of grating filters and/or proximity couplers to remove unused pump light or to reflect it for improved absorption is being studied. Monitor photo diodes are pigtailed to optical taps on the signal channel of the splitter, and used for electronic control of the gain and stabilisation against thermal effects.
A testbed with a tree-and-branch PON structure, which distributes analogue CATV services at 1550nm, is being modified to incorporate the LIASON lossless splitters at the optical branch outlets. A second testbed with a double PON structure used for the distribution of CATV services as well as for interactive digital communications (mainly telephone service) will also be used as a digital environment.
Key Issues
- Extension of the optical network into customer premises.
- Exploitation of optical integration.
- Development of optical integration.
Expected Impact
The development of planar integrated lossless splitters and their evaluation in realistic testbeds will make it possible to extend the optical network to customer premises, making truly broadband communications more readily available to users. More generally, the demonstration of such devices will promote interest in integrated optics and encourage the development of more sophisticated optical chips.
Champ scientifique (EuroSciVoc)
CORDIS classe les projets avec EuroSciVoc, une taxonomie multilingue des domaines scientifiques, grâce à un processus semi-automatique basé sur des techniques TLN. Voir: Le vocabulaire scientifique européen.
CORDIS classe les projets avec EuroSciVoc, une taxonomie multilingue des domaines scientifiques, grâce à un processus semi-automatique basé sur des techniques TLN. Voir: Le vocabulaire scientifique européen.
- ingénierie et technologie génie électrique, génie électronique, génie de l’information ingénierie de l’information télécommunication réseau de télécommunications réseau optique
- ingénierie et technologie ingénierie des materiaux solides amorphes
- sciences naturelles sciences physiques optique physique des lasers
Vous devez vous identifier ou vous inscrire pour utiliser cette fonction
Programme(s)
Programmes de financement pluriannuels qui définissent les priorités de l’UE en matière de recherche et d’innovation.
Programmes de financement pluriannuels qui définissent les priorités de l’UE en matière de recherche et d’innovation.
Thème(s)
Les appels à propositions sont divisés en thèmes. Un thème définit un sujet ou un domaine spécifique dans le cadre duquel les candidats peuvent soumettre des propositions. La description d’un thème comprend sa portée spécifique et l’impact attendu du projet financé.
Données non disponibles
Les appels à propositions sont divisés en thèmes. Un thème définit un sujet ou un domaine spécifique dans le cadre duquel les candidats peuvent soumettre des propositions. La description d’un thème comprend sa portée spécifique et l’impact attendu du projet financé.
Appel à propositions
Procédure par laquelle les candidats sont invités à soumettre des propositions de projet en vue de bénéficier d’un financement de l’UE.
Données non disponibles
Procédure par laquelle les candidats sont invités à soumettre des propositions de projet en vue de bénéficier d’un financement de l’UE.
Régime de financement
Régime de financement (ou «type d’action») à l’intérieur d’un programme présentant des caractéristiques communes. Le régime de financement précise le champ d’application de ce qui est financé, le taux de remboursement, les critères d’évaluation spécifiques pour bénéficier du financement et les formes simplifiées de couverture des coûts, telles que les montants forfaitaires.
Régime de financement (ou «type d’action») à l’intérieur d’un programme présentant des caractéristiques communes. Le régime de financement précise le champ d’application de ce qui est financé, le taux de remboursement, les critères d’évaluation spécifiques pour bénéficier du financement et les formes simplifiées de couverture des coûts, telles que les montants forfaitaires.
Données non disponibles
Coordinateur
77210 AVON
France
Les coûts totaux encourus par l’organisation concernée pour participer au projet, y compris les coûts directs et indirects. Ce montant est un sous-ensemble du budget global du projet.