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Academic literature on the topic 'Fibre optique chalcogénure microstructurée'
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Dissertations / Theses on the topic "Fibre optique chalcogénure microstructurée"
Caillaud, Céline. "Élaborations et caractérisations de fibres optiques microstructurées en verres de chalcogénures pour le moyen infrarouge." Thesis, Rennes 1, 2016. http://www.theses.fr/2016REN1S062/document.
Full textChalcogenide glasses combine several properties : large transparency in the infrared range, a high refractive index (n>2) and strong non-linear properties. The realization of microstructured optical fibers (MOFs) exacerbates non-linear effects more particularly by varying the opto-geometrical parameters of the fibers (d and Λ). Thus, single-mode propagation can be obtained and also generation of non-linear effects. The realization of high purity chalcogenide glasses is needed. In fact, absorption bands limiting the transparency of the fibers must be identified and minimized. For this, monitoring and qualification of components used in the synthesis of glasses should be undertaken. A protocol of synthesis and purification by heat treatment was implemented in this direction. The technique to elaborate MOFs is the casting method. It consists of flowing a glass on a silica mold. The geometry is the negative shape of the desired fiber. This method allows the realization of multimode or single-mode fiber in the 1-10 μm window. The realization of infrared sources was developed in the manuscript. The generation of a supercontinuum with a suspended-core fiber has been presented and also by the realization of a quantum cascade laser (QCL) coupled into a singlemode fiber. In addition, a polarization-maintaining fiber (PMF) having a group birefringence of the order of 10-3 was developed through the evolution of the silica mold. In addition, an optical coupler, an all-solid fiber and an infrared bundle were achieved during this thesis
Fortier, Coraline. "Génération de sources optiques fibrées très hautes cadences et caractérisations de fibres optiques microstructurées en verre de Chalcogénure." Phd thesis, Université de Bourgogne, 2011. http://tel.archives-ouvertes.fr/tel-00605129.
Full textBalme, Coraline. "Génération de sources optiques fibrées très hautes cadences et caractérisation de fibres optiques microstructurées en verre de Chalcogénure." Thesis, Dijon, 2011. http://www.theses.fr/2011DIJOS022/document.
Full textThis memory of thesis s' registered voter in the context of the FUTUR project financed by l'ANR and concerning the development of optical finctions fot the high bit-rate transmissions in the Network heart and carries on very high rates optical fibers sources generation and the optical chalcogenide microstructured fiber charaterization. For this purpose, we study the linear and non-linear characteristics of microstructured chalcogenide fibers conceived and realized in various collaborations within the framework of the ANR FUTUR project. For that a great number of characterizations methods were developed giving a comparison between a standard single mode fiber and there microstructured chalcogenide fibers. For exemple, an interferometric setup for the chromatic dispersion measurement for short sample, or many experimental setup allowing the nonlinear properties characterizations as of these fibers (Raman scattering, nonlinear Kerr Coefficient). The second part of this memory presents the settling of sinusoidal beat conversion into a high bit rate generation method. It is shown in this manuscript that this technique was exploited with readiest of its limits, by obtaining extremely short pulses and by very high bit-rate. The pulses train at very high rates were characterized by an experimental device SHG-FROG. A demonstration of the multiplication of the bit-rate by two at summer shown by Talbot effect
Fortier, Coraline. "Génération de sources optiques fibrées très hautes cadences et caractérisation de fibres optiques microstructurées en verre de Chalcogénure." Phd thesis, Université de Bourgogne, 2011. http://tel.archives-ouvertes.fr/tel-00692345.
Full textNguyen, Thanh Nam. "Etude de composants optiques à base de fibres optiques non-linéaires." Phd thesis, Université Rennes 1, 2008. http://tel.archives-ouvertes.fr/tel-00365863.
Full textEn ce qui concerne la modélisation de la propagation non-linéaire, ce travail passe en revue plusieurs méthodes de résolution de l'équation non-linéaire de Schrödinger (ENLS) connues sous le nom de méthodes split-step Fourier. Pour trois de ces méthodes, une modification astucieuse de l'algorithme de résolution numérique de l'ENLS permettant d'augmenter l'efficacité de la méthode est proposée. Ce travail présente également une nouvelle méthode split-step Fourier permettant de résoudre l'ENLS avec une précision choisie.
Pour la partie concernant la caractérisation de fibres optiques non-linéaires, ce travail présente, pour la première fois, les caractérisations optiques de fibres optiques microstructurées en verre de chalcogénure et démontre leur fort potentiel pour des applications non-linéaires. Des caractérisations non-linéaires de fibres optiques microstructurées en verre de silice présentant une faible atténuation et un gain Raman record sont également présentées. Une nouvelle méthode pour mesurer simultanément la dispersion chromatique et le coefficient non-linéaire de fibres optiques, basée sur l'effet de compression soliton, est proposée.
Concernant l'étude du régénérateur de Mamyshev, ce travail propose une étude théorique conduisant à l'élaboration d'un abaque pour le dimensionnement du régénérateur et permettant d'étudier le rôle du pré-filtrage et le mécanisme de gigue temporelle introduite par le régénérateur. L'étude expérimentale du régénérateur met en évidence le rôle néfaste de l'effet Brillouin et du mélange à quatre ondes sur les performances d'un régénérateur à 40 Gbit/s. Une nouvelle architecture de régénérateur, basée sur l'utilisation d'un compresseur d'impulsions, est proposée afin d'éliminer ces effets indésirables. Son efficacité est démontrée au cours d'une expérience de régénération en boucle à recirculation.
Hey, Tow Kenny. "Laser Brillouin à fibre microstructurée en verre de chaleogénure." Phd thesis, Université Rennes 1, 2013. http://tel.archives-ouvertes.fr/tel-00860216.
Full textLe, Sy Dat. "Traitement tout-optique du signal à base de nouvelles fibres optiques non-linéaires." Phd thesis, Université Rennes 1, 2012. http://tel.archives-ouvertes.fr/tel-01016801.
Full textNguyen, Thanh Nam. "Étude de composants optiques à base de fibres optiques non-linéaires." Rennes 1, 2008. http://www.theses.fr/2008REN1E003.
Full textThis work deals with the possibility of using silica holey fibres (SHF) and chalcogenide holey fibres (CHF) for applications in all-optical regeneration at 40 Gbit/s. The original results obtained during this work are arranged in three parts. Firstly, this work reviews several methods, known as the split-step Fourier (SSF) methods, to solve the non-linear Schrödinger equation (NLSE) in order to simulate nonlinear propagation in optical fibres. For three of these methods, modifications in their algorithms to increase their efficiency have been proposed. This work also presents a new SSF method which can solve the NLSE with a given accuracy. Secondly, this work presents, for the first time, the optical characterizations of CHF fibres and their strong potential for non-linear applications. The optical characterizations of SHF fibres, especially with a strong Raman gain, are also presented. A novel method, based on the effect of soliton compression, to measure simultaneously the dispersion and the nonlinear coefficient in an optical fibre, is also proposed. . Lastly, this work proposes an abacus for the dimensioning of the regenerator at 40 Gbit/s. It points out the role of pre-filtering and studies the mechanism of power-dependent-induced jitter introduced by the regenerator. This work proposes also a new architecture of regenerator at 40 Gbit/s, based on the use of a compressor which exploits self-phase modulation, to eliminate some undesirable effects such as Brillouin scattering and intra-channel four-wave mixing. The efficiency of the architecture is shown experimentally within a recirculating loop
Coulombier, Quentin. "Fibres microstructurées en verres de chalcogénures pour la génération de super continuum et le transport de puissance dans les fenêtres atmosphériques 3-5 et 8-12 µm." Rennes 1, 2010. https://tel.archives-ouvertes.fr/tel-00531237.
Full textTwo interests in chalcogenide glasses (CG) are their transparency in the infrared and their non linear properties. The microstructured optical fibers (MOF) allow single mode signal guiding and/or exacerbate non linear effects. CG MOF permit to obtain single mode and/or non linear fibers in the infrared region. There are many potential applications for MOF. They can be used to build lasers, for spectrometry of for nulling interferometry, and for signal regeneration, supercontinuum sources, or military applications. The elaboration of CG MOF made by a casting method is explained. This method permits to obtain the lowest optical losses in CG MOF. Many MOF were fabricated in As-Se, Te-As-Se glasses. Various fiber geometries were fabricated to cover all the applications. Then, chalcogenide MOF are tested to obtain self phase modulation and Raman scattering. Besides, a strongly non linear composition, with good thermal properties to be molded, was determined using a design of experiments
Toupin, Perrine. "Fibres optiques microstructurées en verre de chalcogénure pour la détection d'espèces chimiques et la conversion de longueurs d'onde." Phd thesis, Université Rennes 1, 2013. http://tel.archives-ouvertes.fr/tel-00910072.
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