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AbstractAbstract
[en] This thesis focuses on the impact of nanostructuring on the performance of erbium doped fiber in severe environment like Space. This study is motivated by the fact that no on-the-shell erbium doped fiber can satisfy the space requirement, disabling the availability of the EDFA (Erbium Doped Fiber Amplifier) and strongly limiting the interest of the WDM technology for satellites. Several fiber based on different technologies have been tested in order to check their behavior under gamma radiations. We have defined an objective criterion for the selection of erbium doped fibers, and showed elements for hardening aluminum co-doped fibers, based solely on design parameters. In this way, we brought to the fore a radiation hardened fiber, based on silica nanoparticles, exhibiting a power decrease of 1 dB after a typical space mission. We also focused on EDFA modeling by proposing an evolved model taking into account non-linear effects due to the complex spectroscopy of erbium. This model is completed by including irradiation effects thanks to a model such as Chen's one. The photo-bleaching effect that has been found to be strong is also considered. (author)
[fr]
Ce travail de these porte sur l'etude de l'impact de la nanostructuration de la matiere sur le comportement des fibres dopees erbium en environnement radiatif tel que l'Espace. Cette etude est motivee par le fait qu'il n'existe pas de fibre dopee erbium qualifiee pour le spatial, rendant l'AOFD indisponible pour ces applications, reduisant fortement l'interet de l'ensemble de la technologie WDM pour les satellites. Nous avons teste plusieurs fibres basees sur des technologies differentes dans le but d'evaluer leurs comportements sous radiations gamma. Nous avons ainsi defini un critere objectif pour la selection des fibres dopees erbium, et avons montre des elements permettant de durcir des fibres co-dopees aluminium en se basant uniquement sur des parametres de conception. De plus, nous avons demontre une fibre durcie aux radiations a base de nanoparticules de silice dopees erbium, montrant une perte de puissance de l'ordre de 1 dB en fin de mission typique d'un satellite. L'accent a egalement ete porte sur la modelisation de l'AOFD en proposant un modele evolue prenant en compte des effets non lineaires lies a la complexite de la spectroscopie de l'ion erbium. Ce modele a ete complete par une prise en compte de l'effet des irradiations et de la guerison optique en utilisant un modele proche de celui developpe par R. Chen. Nous avons pu noter la grande importance de l'effet de la guerison optique sur les performances de l'AOFD en fin de vie. (auteur)Original Title
Impact de la Nanostructuration des Fibres Dopees Erbium sur leurs Performances: Application aux Contraintes du Spatial
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Secondary Subject
Source
13 Dec 2013; 177 p; 139 refs.; Available from the INIS Liaison Officer for France, see the INIS website for current contact and E-mail addresses; These docteur de l'universite Montpellier II, Discipline: electronique, Composants et Systemes
Record Type
Miscellaneous
Literature Type
Thesis/Dissertation
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Country of publication
ALGORITHMS, AMPLIFICATION, CHALCOGENIDES, DOSES, ELECTROMAGNETIC RADIATION, ELECTRONIC EQUIPMENT, ELEMENTS, EQUIPMENT, FIBERS, HARDENING, IONIZING RADIATIONS, MATERIALS, MATHEMATICAL LOGIC, METALS, NOISE, OXIDES, OXYGEN COMPOUNDS, PHYSICAL RADIATION EFFECTS, RADIATION EFFECTS, RADIATIONS, RARE EARTHS, SILICON COMPOUNDS
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