Academic literature on the topic 'Fibre Optique'

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Journal articles on the topic "Fibre Optique"

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Mur, Jean-Michel. "Raccordement des fibres optiques à l’habitat - FTTH." Photoniques, no. 99 (November 2019): 36–39. http://dx.doi.org/10.1051/photon/20199936.

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Le déploiement de la fibre optique jusqu’à l’habitat (fiber to the home – FTTH) a des conséquences (on pourrait parler de défis à relever) comme la création des fibres UIT-T G.657, une pénurie de main-d’oeuvre, de nouveaux réseaux optiques passifs et des évolutions des équipements. Tour d’horizon…
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-GREGORY, Brian. "Les connecteurs à fibre optique." Revue de l'Electricité et de l'Electronique -, no. 08 (1999): 50. http://dx.doi.org/10.3845/ree.1999.087.

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Dejean, Sylvain, and Sophie Tarascou. "À qui profite la fibre ? Estimation des besoins en très haut débit et déploiement de la fibre optique en France." Canadian Journal of Regional Science 45, no. 2 (September 13, 2022): 69–88. http://dx.doi.org/10.7202/1092247ar.

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Le déploiement de la fibre optique est une condition nécessaire pour relever les défis posés par l’économie numérique du XXIe siècle. Si 80 % des français se voient promettre à l’horizon 2022 d’avoir accès à la fibre à domicile, nous savons encore peu de choses sur les disparités locales et régionales que cela pourrait occasionner. Dans cet article, nous essayons, en nous basant sur des jeux de données hétérogènes, de développer une méthode permettant d’estimer les besoins des populations en connexion très haut débit afin de les confronter à la présence ou non de la fibre optique sur leur territoire. Parmi nos principaux résultats, nous montrons qu’il existe de fortes disparités territoriales dans l’accès et dans les besoins, certaines communes notamment péri-urbaines, représentant presque 3 millions d’habitants, pourraient être, au regard de leurs besoins, particulièrement fragilisées par l’absence de fibre optique.
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Cassan, E. "Étude expérimentale d'une liaison par fibre optique." J3eA 4 (2005): 034. http://dx.doi.org/10.1051/bib-j3ea:2005734.

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Labrousse-Ansiaux, Alexandra, Sylvain Magne, Stéphane Rougeault, Laurent Maurin, Guillaume Laffont, Véronique Marty-Dewiter, and Pierre Ferdinand. "L’instrumentation à fibre optique pour les structures intelligentes." Annales de Chimie Science des Matériaux 29, no. 6 (November 2004): 65–80. http://dx.doi.org/10.3166/acsm.29.6.65-80.

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SANTARELLI, G., O. LOPEZ, F. KÉFÉLIAN, H. JIANG, B. CHANTEAU, M. LOURS, F. NARBONNEAU, et al. "Transfert de fréquence par fibre optique en métrologie." Revue française de métrologie, no. 33 (April 10, 2014): 8–18. http://dx.doi.org/10.1051/rfm/2014003.

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Saïssy, A., J. Botineau, and L. Macon. "Rétrodiffusion Raman stimulée dans une fibre optique biréfringente." Revue de Physique Appliquée 20, no. 3 (1985): 129–36. http://dx.doi.org/10.1051/rphysap:01985002003012900.

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Gouillon, A. S., Ph Delaporte, M. Sentis, and O. Uteza. "Transmission de fortes puissances UV par fibre optique." Le Journal de Physique IV 09, PR5 (May 1999): Pr5–23—Pr5–24. http://dx.doi.org/10.1051/jp4:1999509.

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Cohen-Selmon, Robin, and Alice Bastick-Ruiz. "Quand la fibre optique rend les bâtiments communicants." Photoniques, no. 83 (September 2016): 25–27. http://dx.doi.org/10.1051/photon/20168325.

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Cohen-Selmon, Robin, and Alice Bastick-Ruiz. "Quand la fibre optique rend les bâtiments communicants." Photoniques, no. 89 (November 2017): 33–35. http://dx.doi.org/10.1051/photon/20178933.

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Dissertations / Theses on the topic "Fibre Optique"

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Saab, Kassem. "Optique adaptative pour les télécommunications optiques." Thesis, Paris Sciences et Lettres (ComUE), 2017. http://www.theses.fr/2017PSLEO016/document.

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Les télécommunications optiques en espace libre sont capables d'autoriser des débits de plusieurs dizaines de gigabits par seconde. Pour traiter ces débits en bénéficiant des techniques développées dans le cadre de l'optique fibrée, il est souhaitable d'injecter le faisceau reçu dans une fibre monomode. Ainsi, l'optique adaptative est proposée pour limiter les pertes d'injection induites par la dégradation de la qualité du faisceau propagé à travers la turbulence atmosphérique.Dans ce travail nous considérons un lien entre un satellite et une station de réception au sol. En élévation haute lorsque les perturbations d'amplitude peuvent être moyennées en augmentant la taille de la pupille la correction de la phase par optique adaptative (OA) classique peut être suffisante. Mes travaux dans ce cadre portent sur la mise en œuvre expérimentale de l'optimisation du couplage entre un système d'OA classique et une fibre monomode, en corrigeant les aberrations différentielles entre la voie de mesure de la surface d'onde et la voie d'injection du signal corrigé par OA. Le travail accompli dans l'objectif de cette mise en œuvre, se résume par les tâches suivantes : Définition d'une méthode d'optimisation automatique de l'injection par contrôle d'un seul miroir déformable pour la correction conjointe des perturbations rapides de la phase et des aberrations différentielles quasi-statiques ; Étude numérique de l'implantation de la méthode définie par simulation end-to-end ; Mise en œuvre de la méthode en laboratoire sur le banc BOA en modélisant la turbulence atmosphérique par des écrans de phase en rotation et validation du fonctionnement de l'optimisation de l'injection en boucle fermée ; Application de la méthode sur le banc ODISSEE à l'OCA puis fermeture de la boucle sur un signal optique émis par le satellite japonais SOCRATE.Par ailleurs, le lien satellite doit être opérationnel sur une durée maximale. Pour cela, le système doit fonctionner même dans le cas où le satellite est bas sur l'horizon et donc lorsque la portion d'atmosphère traversée par le faisceau est épaisse. Dans ces conditions particulières, les perturbations induites par les fluctuations de l'indice de l'air sont plus fortes que pour l'observation astronomique, donc la correction simultanée de la phase et de l'amplitude est indispensable pour atteindre le taux d'injection désiré (> 50 %). La deuxième partie de la thèse se place dans ce cadre et est consacrée à l'étude de l'implantation expérimentale d'une approche innovante de la correction de la phase et de l'amplitude fondée sur l'utilisation d'un Mach-Zehnder en optique intégrée. Le travail réalisé dans cette partie comporte les points suivants : Élaboration du principe de la correction par un Mach-Zehnder et proposition d'un dispositif généralisé à N voies ; Étude analytique de la correction par le dispositif proposé ; Développement d'un algorithme de contrôle fondé sur l'architecture proposée en optique intégrée ;• Validation numérique du fonctionnement par simulation end-to-end ; Conception d'un prototype pour la validation expérimentale du concept
Free space optical communications are able to allow rates of several tens of gigabits/s. In order to process these flows and benefit from the techniques developed in the context of fiber optics, it is desirable to inject the received beam into a single mode fiber. In this case, adaptive optics is proposed to limit the injection losses induced by the degradation of the beam quality caused by the atmospheric turbulence.In this thesis, we consider a link between a satellite and a ground receiving station.For high elevations when amplitude perturbations can be averaged by increasing the size of the pupil and the correction of the phase is sufficient by conventional adaptive optics (AO), this work deals with the experimental implementation of the coupling optimization between a conventional AO and a single mode fiber, by correcting the non common path aberrations between the measurement path of the wave front and the injection path of the corrected signal. The accomplished work in this context is summarized by the following tasks: definition of an automatic injection optimization method by controlling a single deformable mirror for the parallel correction of fast phase disturbance and quasi-static differential aberrations; numerical study of the implementation of the proposed method defined end-to-end simulations ; implementation of the method in the laboratory on the BOA bench, modeling the atmospheric turbulence by rotating phase screens, and validation of the injection optimization in closed loop ; application of the method on the ODISSEE bench at the OCA and closing of the loop on a laser signal emitted by the Japanese satellite SOCRATE.Besides, the link must be operational for a maximum duration. Indeed, the system must operate even when the satellite is low on the horizon and, therefore, when the crossed portion of atmosphere is thick. In these particular conditions, the disturbances induced by the air index fluctuations are stronger than for astronomical observations, so that, the simultaneous correction of the phase and the amplitude is essential to reach the desired injection ratio (> 50 %). Based on this analysis, the second part of this thesis focuses on the study of the experimental implementation of an innovative approach of a phase and amplitude correction based on using an integrated Mach-Zehnder. The work done in this part consists in the following points : elaboration of correction principle by a Mach-Zehnder and proposition of a generalized device with N channels ; theoretical analysis of the superposition by the proposed device ; development of a control algorithm based on the architecture proposed in integrated optics ; numerical validation of operation by end-to-end simulations ; design of the prototype for the experimental validation of the concept in the laboratory
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Hanna, Marc. "Sources laser femtoseconde à fibre optique." Habilitation à diriger des recherches, Université Paris Sud - Paris XI, 2013. http://tel.archives-ouvertes.fr/tel-00806296.

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Les sources laser à fibre sont de plus en plus utilisées dans des domaines très divers car elles possèdent des avantages majeurs : qualité de faisceau, intégration, possibilité d'émettre une puissance moyenne élevée, efficacité, robustesse. Nous présentons des travaux de recherche visant à étendre les performances des sources ultrarapides basées sur les fibres en utilisant des effets d'optique non linéaire et en proposant de nouvelles architectures laser.
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Pophillat, Lucien. "Transmission video par fibre optique." Limoges, 1987. http://www.theses.fr/1987LIMOA001.

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Presentation d'un systeme de transmission video par fibre optique dont l'originalite reside dans la performance en sensibilite qui permet notamment l'utilisation d'une diode electroluminescente avec une fibre monomode. On propose egalement un procede de modulation et de multiplexage temporel adapte aux caracteristiques et contraintes propres aux transmissions optiques
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Pophillat, Lucien. "Transmission vidéo par fibre optique." Grenoble 2 : ANRT, 1987. http://catalogue.bnf.fr/ark:/12148/cb37608975p.

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Debut, Alexis. "Cohérence temporelle des lasers Brillouin à fibre optique." Lille 1, 2000. http://www.theses.fr/2000LIL10094.

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Le travail presente dans ce memoire porte sur l'etude theorique et experimentale de la coherence temporelle des lasers brillouin a fibre optique. Dans le cadre du modele coherent a trois ondes decrivant le comportement dynamique des lasers brillouin, nous etablissons une relation analytique liant la phase de l'onde stokes a celle de l'onde de pompe. Contrairement aux lasers classiques, nous montrons que le bruit de phase du laser de pompe est transfere a l'onde stokes emise apres avoir ete filtre et reduit. Il en resulte que le temps de coherence de l'onde stokes est beaucoup plus important que celui de l'onde de pompe. Le rapport entre ces deux temps de coherence est donne par un facteur k 2. Ce facteur depend simplement et uniquement du taux de perte de la cavite et du taux d'amortissement de l'onde acoustique. Nous presentons ensuite un protocole experimental dans lequel nous enregistrons la reponse du laser brillouin a une modulation de frequence du laser de pompe. Le rapport entre l'indice de modulation de l'onde de pompe et celui de l'onde stokes nous donne la valeur du coefficient k. Les resultats experimentaux confirment avec succes nos predictions theoriques. Pour terminer, nous appliquons nos methodes d'analyse a un laser brillouin injecte optiquement. Nous demontrons experimentalement et theoriquement que celui-ci emet un rayonnement stable en intensite quelque soit le regime de fonctionnement du laser brillouin.
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Neveux, Antoine Laurent. "Optoalimentation de capteurs par fibre optique." Nice, 1990. http://www.theses.fr/1990NICE4421.

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Les travaux que décrit ce mémoire ont montré les performances des capteurs optoalimentés par fibres optiques en environnement hostile. Après quelques généralités sur l'alimentation optique par fibre, la première partie traite de la conversion photovoltaïque, des différents procédés d'élévation de tension, et des problèmes liés à l'alimentation électronique, en particulier de l'évolution des ressources et des besoins avec la température. La seconde partie traite des circuits électroniques du capteur. Le problème de consommation électrique a été résolu certes par l'utilisation de la technologie CMOS, mais surtout par un fonctionnement séquentiel des différents organes et par une méthode de codage qui tire profit des caractéristiques de la fibre. La structure et la mise en œuvre des circuits ont été particulièrement soignées afin de concilier la métrologie précise et la faible consommation. Après une étude portant sur l'unité de contrôle chargée de gérer le capteur optoalimenté, une discussion est ouverte sur les perspectives de cette technique. Les annexes décrivent en détail les deux réalisations qui ont étayé cette étude
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Grondin, Odile. "Vers un fluoroimmunocapteur à fibre optique." Vandoeuvre-les-Nancy, INPL, 1994. http://www.theses.fr/1994INPL078N.

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L’objectif de la recherche est de mettre au point un capteur à fibre optique pour l'immunofluoroanalyse. La réalisation de tels capteurs nécessite le développement de plusieurs procédés: le greffage de molécules sur support de silice, la synthèse chimique de sondes fluorescentes et leur couplage à des biomolécules, la détermination de caractéristiques photophysiques et les opérations liées à l'immunologie. Le dosage développé dans cette étude repose sur la variation d'émission lumineuse de rotors moléculaires fluorescents due à la modification de leur environnement lors de la réaction antigène-anticorps. Dans ce but, deux actions principales ont été développées: l'étude du greffage sur des fibres en silice de molécules fluorescentes pour appréhender les facteurs qui conditionnent les modes de greffage soit par fixation par liaison chimique soit par adhésion physique; l'acide 4-(1-pyrenyl)butyrique et les IgG-FITC, (immunoglobulines liées à la fluorescéine) pris respectivement comme modèles de molécules organiques et de biomolécules. Différentes conditions de greffage (silanisation, solvant, réactif,. . . ) influencent la quantité de molécules fixées. L’utilisation de divers post-traitements, jouant sur la désorption, permettent d'évaluer les proportions relatives des deux modes de greffage. La synthèse de dérivés fluorescents de médicaments (théophylline et acide valproique) pour développer des applications en immunoanalyse. La préparation des entités médicament - rotor moléculaire fluorescent repose sur la synthèse de deux types de composés (rotors fluorescents et dérivés fonctionnels des médicaments) suivie de leur couplage. Les produits fluorescents obtenus dans ce travail présentent des caractéristiques photophysiques adaptées aux variations d'environnement, mais n'ont pu être appliqués pour les dosages immunologiques, car leur activité antigénique n'est pas préservée
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Jiang, haifeng. "Développement de liens optiques ultra-stables pour le transfert de fréquences à longues distances." Paris 13, 2010. http://www.theses.fr/2010PA132010.

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Le transfert des fréquences ultra-stables entre laboratoires distants est requis par de nombreuses applications concernant la métrologie temps/fréquence, la physique fondamentale, les accélérateurs de particules et l'astrophysique. Cette thèse décrit le développement de liaisons optiques ultra-stables sur des distances de 86 à 300 km. L'objectif à long terme est de développer des liens optiques de 1000 km environ afin de relier les principaux instituts nationaux de métrologie en Europe. Le lien optique est basé sur le transfert de la phase optique d'un laser ultra-stable de longueur d'onde 1542 nm par une fibre optique du réseau de télécommunications. Pour cela ont été développés des lasers stabilisés sur cavité Fabry-Perot et sur fibre optique. L'instabilité relative des lasers stabilisés sur cavité est de l’ordre de 10-15 pour un temps d'intégration de 1 s. Les lasers stabilisés sur fibre sont robustes, compacts, simples, accordables et leur bruit de fréquence est comparable à celui des lasers stabilisés sur cavité pour des fréquences supérieures à quelques dizaines de Hertz. Les liens optiques ont d'abord été démontrés sur 86 km et 172 km en utilisant des fibres dédiées reliant les laboratoires LNE-SYRTE et LPL. L'instabilité relative de fréquence obtenue était de l'ordre de 10-19 pour des temps d'intégration de 104 s. Pour des distances plus grandes, le signal ultra-stable est transféré directement sur le réseau Internet en utilisant un canal de fréquence dédiée, par la technique de multiplexage en longueur d’ondes. Un lien multiplexé a ainsi été démontré sur une distance de 300 km, avec une instabilité relative de fréquence au même niveau qu’avec des fibres dédiées
The transfer of ultra-stable frequencies between distant laboratories is required by many applications in time and frequency metrology, fundamental physics, particle accelerators and astrophysics. This thesis describes the development of ultra-stable optical links over distances from 86 km to 300 km. The long-term objective is to connect the main European National Metrology Institutes with optical links extending up to 1000 km. The optical link is based on the transfer of the optical phase of an ultra-stable laser emitting light of wavelength 1542 nm through an optical fiber of the telecommunication network. For that purpose, ultra-stable cavity-stabilized lasers and fiber-stabilized lasers have been developed. The fractional instability of cavity-stabilized laser is approximately 10-15 at 1s integration time. The fiber-stabilized lasers are robust, compact, simple, tunable and their frequency noise is comparable to that of the cavity-stabilized laser for Fourier frequencies higher than a few tens of Hertz. Optical links were first demonstrated on 86 km and 172 km using dedicated fibers connecting the laboratories LNE-SYRTE and LPL. Fractional frequency instability in the range of or below 10-19 at 104 s integration time has been obtained. For larger distances, the ultra-stable laser signal is transferred on the Internet network simultaneously with the data traffic but on a dedicated frequency channel, using wavelength division multiplexing. Multiplexed links were demonstrated over distances up to 300 km, with fractional frequency instabilities at the same level or better than with dedicated fibers
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Mouchel, Paul. "Fonctions optiques basées sur des composants fibrés passifs : Collimation du signal issu d’une fibre optique et verrouillage de mode." Thesis, Angers, 2018. http://www.theses.fr/2018ANGE0055.

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Le développement de composants fibrés passifs est un enjeu crucial dans le domaine des lasers à fibre car ils permettent de répondre aux besoins de marchés critiques. Cette thèse s’intéresse à deux types de composants : les collimateurs qui servent à réduire la divergence du signal en sortie de laser et les absorbants saturables réels qui permettent d’obtenir des impulsions ultracourtes (ordre de la picoseconde). Le travail sur les collimateurs fibrés a mené dans un premier temps à la conception d’un composant compact capable de transmettre jusqu’à 20 W de puissance continue. Un second collimateur plus complexe qui permet de contrôler également l’axe optique (déviation angulaire et centrage) par rapport à la mécanique a été développé. La simulation du composant, la procédure d’assemblage et le banc d’alignement mis en place spécifiquement pour répondre à ce besoin sont détaillés. Le second composant est un absorbant saturable réel fibré : un taper sur lequel du graphène est déposé. Le choix des caractéristiques de réduction de la fibre, sa fabrication et la technique de dépôt du graphène sont détaillés. Une étude de son intégration dans la cavité résonante d’un laser est présentée. Le laser émet des impulsions d’énergie 1 nJ, de durée 4 ps et a une puissance moyenne de 520 mW. Les limitations en puissance du composant sont également évoquées
The development of fiber-based passive components is at stakes in the industry of fiber lasers.They are key components in order to meet the needs of critical markets. Two kinds of components are studied: collimators and real saturable absorbers. The former’s goal is to reduce the divergence of the output signal of a laser. When inserted in a cavity, the latter allows the generation of ultrashort pulses (order of the picosecond). We first developed a compact fiber collimator capable of transmitting up to 20 W of continuous optical signal. A more complex collimator was then developed. We are able to control the deviation and centring of the optical axes thanks to its design. The simulation of the component, the process of fabrication and the optical bench we specifically created for the alignment are discussed. The second component that we worked on is a real saturable absorber : a taper with graphene deposited on its waist. The reduction of the fiber diameter, the fabrication of the component and the process of deposition of graphene are described. We also studied the way the component behaves in the resonant cavity of a laser. The laser generated ultrashort pulses with an energy of 1 nJ and a duration of 4 ps. The average power of the laser is 520 mW. The limitations of the component are also discussed
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ALLOUCHE, VIRGINIE. "Etude de l'amplificateur optique a fibre dopee erbium et de transmissions longues distances a fibre et amplificateurs optiques." Paris 6, 1994. http://www.theses.fr/1994PA066296.

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Cette these s'inscrit dans le cadre des transmissions longues distances a fibre et amplificateurs optiques. Apres une presentation generale de l'amplificateur optique a fibre dopee erbium (ao) dans la premiere partie, l'expose est consacre a l'etude theorique et experimentale de l'amplificateur (deuxieme partie). Deux modelisations (analytique et numerique) de l'ao sont presentees et validees par comparaison a des resultats experimentaux. La modelisation numerique est mise a profit pour optimiser les parametres d'un ao experimental fort gain ( 25 db a petit signal). Deux bancs de mesure du coefficient d'exces de bruit d'un ao ont ete mis au point: un banc optique et un banc electrique. La methode electrique a conduit a la determination des differentes contributions de bruit (battements signal-spontanee et spontanee-spontanee) au bruit total. Une estimation quantitative de la dispersion modale de polarisation d'un amplificateur est faite a l'aide d'un montage experimental rapide a realiser. L'evolution de la zone d'auto-filtrage en fonction de l'attenuation entre deux ao consecutifs est egalement etudiee de maniere experimentale et theorique. Un logiciel de simulation d'un systeme de transmission optique complet est presente dans la troisieme partie. Il inclue la modelisation numerique de l'ao precedemment citee et une modelisation de la propagation dans les fibres optiques monomodales en presence de dispersion chromatique, de non linearite (effet kerr) et d'absorption. Ce logiciel comprend notamment un module d'analyse de resultats tres complet: traces des formes temporelles et spectrales des impulsions, diagramme de l'il, evaluation du facteur de qualite q le logiciel est utilise pour approfondir une etude experimentale liee a l'evolution du bruit electrique en fonction de la distance. La derniere partie de ce memoire est consacree a l'etude de l'effet rayleigh. On s'est attache, tout d'abord, a caracteriser qualitativement et quantitativement les effets rayleigh simple et double dans la fibre optique silice (passive). Cette etude est ensuite poursuivie au niveau de la fibre dopee erbium seule et sous la forme d'un module d'ao. L'effet rayleigh est caracterise pour differentes concentrations en dopant erbium. Les evolutions des effets rayleigh simple et double sont determinees en fonction du gain et comparees aux resultats obtenus par modelisation. Des observations de l'effet rayleigh sur des liaisons de plusieurs milliers de kilometres sont illustrees par des mesures experimentales et un calcul theorique. Le logiciel de simulation est finalement mis a profit pour estimer l'influence de l'effet rayleigh sur les performances de liaisons longues
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Books on the topic "Fibre Optique"

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Edwards, T. C. Fiber-optic systems: Network applications. Chichester, West Sussex, England: Wiley, 1989.

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P, Guihot, and Institut national de recherche pédagogique (France). Département Technologies nouvelles et éducation. Groupe télématique., eds. Applications éducatives de la vidéocommunication: Le réseau fibre optique de Biarritz et le visiophone. Paris: Institut national de recherche pédagogique, 1990.

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Françon, Maurice. Thèmes actuels en optique: Conjugaison de phase, bistabilité optique, impulsions ultracourtes, réciprocité en interférométrie, fibres optiques, senseurs à fibres, télécommunications optiques. Paris: Masson, 1986.

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Eric, Udd, ed. Fiber optic sensors: An introduction for engineers and scientists. New York: Wiley, 1991.

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S, Hansen Kimberly, ed. Fiber optic reference guide: A practical guide to the technology. 2nd ed. Boston: Focal Press, 1999.

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Goff, David R. Fiber optic reference guide: A practical guide to the technology. Edited by Hansen Kimberly S. Boston: Focal Press, 1996.

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S, Hansen Kimberly, ed. Fiber optic reference guide: A practical guide to communications technology. 3rd ed. Amsterdam: Focal Press, 2002.

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Young, Matt. Optics and lasers: Including fibers and optical waveguides. 5th ed. Berlin: Springer, 2000.

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Young, Matt. Optics and lasers: Including fibers and optical waveguides. 4th ed. Berlin: Springer-Verlag, 1992.

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Young, Matt. Optics and lasers: Including fibers and optical waveguides. 3rd ed. Berlin: Springer-Verlag, 1986.

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Book chapters on the topic "Fibre Optique"

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Liu, N., Y. J. Li, K. R. Wang, S. R. Yao, C. X. Zhang, and Z. L. Xu. "Contribution de 100 000 images aux études du microendoscope à fibre optique." In Acquis et limites en sénologie / Assets and limits in breast diseases, 370–74. Paris: Springer Paris, 2013. http://dx.doi.org/10.1007/978-2-8178-0396-8_64.

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Wang, Xueqin, Chunxi Zhang, Jing Jin, and Ningfang Song. "Optimum Length of Fiber Coil in Space-Borne Interferometric Fiber Optic Gyroscope." In Lecture Notes in Electrical Engineering, 683–88. Berlin, Heidelberg: Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-642-28744-2_89.

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Withana, H., and Y. X. Zhang. "Behavior of Hybrid Engineered Cementitious Composites Containing Nanocellulose." In Lecture Notes in Civil Engineering, 37–41. Singapore: Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-99-3330-3_6.

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AbstractNanocellulose (NC) is a promising reinforcing material for cementitious composites, but its effect on the mechanical properties of hybrid engineered cementitious composites (ECCs) has not been studied. In this paper, we investigated a hybrid polyethylene (PE)-steel fibre ECC reinforced with NC and the effect of NC dosages ranging from 0.1% to 0.4% on the compressive strength of the hybrid ECC. The optimum quantity of NC for the best mechanical property of ECC was determined. Enhancement of compressive strength was observed for all the mixes with NC compared with the reference mix, and the mix containing 0.2% NC showed the maximum improvement.
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Hatzigeorgiou, G. D., and D. E. Beskos. "On the Optimum Design of Fibre Reinforced Concrete — Steel Composite Columns." In Recent Advances in Composite Materials, 357–70. Dordrecht: Springer Netherlands, 2003. http://dx.doi.org/10.1007/978-94-017-2852-2_30.

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Awad, Ziad K., Thiru Aravinthan, and Yan Zhuge. "Cost Optimum Design of Structural Fibre Composite Sandwich Panel for Flooring Applications." In Advances in FRP Composites in Civil Engineering, 478–81. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-17487-2_103.

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Shao, S., M. Miki, and Y. Murotsu. "Reliability-Based Optimum Design for Multiaxial Fiber Reinforced Laminate Systems." In Lecture Notes in Engineering, 339–50. Berlin, Heidelberg: Springer Berlin Heidelberg, 1992. http://dx.doi.org/10.1007/978-3-642-84753-0_25.

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Rawat, S., Y. X. Zhang, and C. K. Lee. "Spalling Resistance of Hybrid Polyethylene and Steel Fiber-Reinforced High-Strength Engineered Cementitious Composite." In Lecture Notes in Civil Engineering, 321–25. Singapore: Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-99-3330-3_33.

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AbstractWe analyzed the effect of elevated temperatures on the integrity of high-strength engineered cementitious composite (ECC) made with a hybrid combination of polyethylene (PE) and steel fibers. The 50 mm cube specimens were subjected to temperature ranging from 200 to 800 °C at three different heating rates: 1, 5, and 10 °C/min. Five different types of mixes with varying content of supplementary cementitious materials and fibers were evaluated. No spalling was observed at 1–5 °C/min heating rate and <400 °C. However, at a heating rate of 10 °C/min for temperature 600–800 °C, all ECC specimens with a PE fiber volume of 1.25 and 1% steel fiber spalled explosively. Moreover, cementitious matrix with silica fume was more prone to spalling at 800 °C and the use of slag or quaternary blend of slag and dolomite at an optimum content was effective in maintaining the integrity of the ECC specimens even at very high heating rates. Thus, the type of cementitious matrix is equally important to consider, as well as fiber type and content, while analyzing the spalling resistance of ECC.
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Günay, Uğur, Serdar Ulusoy, Gebrail Bekdaş, and Sinan Melih Nigdeli. "Optimum Design of Reinforced Concrete Columns in Case of Fire." In Studies in Systems, Decision and Control, 35–48. Cham: Springer Nature Switzerland, 2023. http://dx.doi.org/10.1007/978-3-031-34728-3_3.

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Nigdeli, Sinan Melih, Gebrail Bekdaş, and Aylin Ece Kayabekir. "A Modified Jaya Algorithm for Optimum Design of Carbon Fiber-Reinforced Polymers." In Studies in Systems, Decision and Control, 251–56. Cham: Springer Nature Switzerland, 2024. http://dx.doi.org/10.1007/978-3-031-65976-8_13.

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Kumar, Vikas, Karanvir Sharma, Devendra Singh Bisht, and Harry Garg. "Optimum Concentration Ratio for Plastic Optical Fiber-Based Fresnel Lens Daylighting System." In Springer Proceedings in Energy, 169–79. Singapore: Springer Singapore, 2022. http://dx.doi.org/10.1007/978-981-16-9280-2_21.

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Conference papers on the topic "Fibre Optique"

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ARTIERES, Olivier. "Auscultation d’ouvrages de protection en remblai par capteur composite géotextile à fibre optique." In Journées Nationales Génie Côtier - Génie Civil. Editions Paralia, 2014. http://dx.doi.org/10.5150/jngcgc.2014.058.

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Le Toulouzan, J. N., and D. Wysoczanski. "Diffusion multiple de la lumière : application à l'orientation de fibres dans des matériaux composites." In Optique instrumentale. Les Ulis, France: EDP Sciences, 1997. http://dx.doi.org/10.1051/sfo/1997009.

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Goure, J. P. "Composants à fibres optiques." In Systèmes optiques. Les Ulis, France: EDP Sciences, 1992. http://dx.doi.org/10.1051/sfo/1992011.

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Boisde, G. "Les capteurs à fibres optiques." In Systèmes optiques. Les Ulis, France: EDP Sciences, 1992. http://dx.doi.org/10.1051/sfo/1992015.

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Goure, J. P. "Capteurs à fibres optiques." In Optoélectronique (Volume 1). Les Ulis, France: EDP Sciences, 1990. http://dx.doi.org/10.1051/sfo/1990009.

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Redlinger-Pohn, Jakob D., Wolfgang Bauer, and Stefan Radl. "Fractionation of Fibre Pulp in a Hydrodynamic Fractionation Device: Influence of Reynolds Number and Accept Flow Rate." In Advances in Pulp and Paper Research, Oxford 2017, edited by W. Batchelor and D. Söderberg. Fundamental Research Committee (FRC), Manchester, 2017. http://dx.doi.org/10.15376/frc.2017.1.209.

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Fibre fractionation in the Hydrodynamic Fractionation Device (HDF) was studied for changing suspension flow parameters, i.e. different channel Reynolds numbers Re and accept flow rates up to 20% of the feed flow rate. The suspension flow behaviour was described using images recorded with a high-speed camera system. Fractionation performance was determined based on mass balances for a variety of length fractions of the pulp. Low Reynolds number flow characterised by Re = 1300 led to the formation of a fluid gap between the wall and the fibres located at the channel centre. Best fractionation performance was achieved for flow at this Reynolds number: no fiber removal was observed at 10% accept flow rate, and only 1% of the fibres were removed at 20% accept flow rate. A design space was established that highlights the optimum settings for fractionation in an HDF, which at low Re and high accept flow rate. Surprisingly, we found a significant increase of fines mass flow rate in the accept upon an increase of the Reynolds number. We speculate that a flow regime-dependent interaction of fines with the fibres exists in the HDF that critically affects the amount of fines in the fluid gap near the wall.
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Farhan, Syed Ahmad, Mohamed Mubarak Abdul Wahab, Nur Hazimah Shokib, Allif Imran Jaleel Faiyaz Ahmed, Nadzhratul Husna, Siti Nooriza Abd Razak, and Nasir Shafiq. "Sugarcane-Bagasse-Fibre-Reinforced Concrete: Evaluation of Compressive and Splitting Tensile Strengths." In 7TH INTERNATIONAL CONFERENCE ON RECENT ADVANCES IN MATERIALS, MINERALS & ENVIRONMENT (RAMM) 2022. Switzerland: Trans Tech Publications Ltd, 2023. http://dx.doi.org/10.4028/p-fqet3t.

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In view of the increasing cost of raw materials and depleting natural resources in many developed countries, adoption of waste in construction materials has to be considered. Fibre-reinforced concrete (FRC) is a type of concrete that employs steel or synthetic fibres. Sugarcane bagasse fibre (SCBF), which is a waste material from the agricultural industry, can potentially be utilized in FRC as an alternative to steel or synthetic fibres. In light of the potential, in the present study, compressive and splitting tensile strengths of sugarcane-bagasse-fibre-reinforced concrete (SCB-FRC) at varying volumes of SCBF were evaluated. Four types of concrete samples were prepared, which are the control sample that does not contain any SCBF and SCB-FRC samples that contain 0.5, 1.0, and 1.5% of SCBF of 5-cm fibre lengths by volume of cement. Samples were cured in water for 7 and 28 days for compressive strength testing and 28 days for splitting tensile testing. Findings indicate that the optimum fibre volume is 1.0%, where the highest compressive strengths of 24.75 and 33.02 MPa were achieved at 7 and 28 days of curing, respectively, and the highest splitting tensile strength of 2.61 MPa was achieved. Formation of fibre bundles during mixing may have resulted in the decrease in strength as the fibre volume was further increased from 1.0 to 1.5%.
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Monerie, M. "Fibres optiques dopées et applications." In Les lasers et leurs applications scientifiques et médicales. Les Ulis, France: EDP Sciences, 1996. http://dx.doi.org/10.1051/sfo/1996010.

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Amal, R., J. Narendra, M. Sivakumar, and M. V. L. R. Anjaneyulu. "Performance Evaluation of Cold Bituminous Mix Reinforced with Coir Fibre." In International Web Conference in Civil Engineering for a Sustainable Planet. AIJR Publisher, 2021. http://dx.doi.org/10.21467/proceedings.112.67.

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Cold bituminous mix (CBM), which is a mixture of bitumen emulsion and aggregate that is mixed together at ambient temperature, has several advantages like energy savings, easiness in preparation, environmental benefits, and high production at low investment. But there are certain limitations of CBMs like inferior mechanical properties, high air voids, weak early life strength, long curing time and poor coating that hinder its extensive usage. The possibility of improving mechanical performance of CBMs by the addition of coir fibre is attempted in this study. The objectives of the study are to assess the improvement in performance of CBM due to addition of coir fibre and to identify the optimum length and optimum content of coir fibre for CBMs. Three coir fibre contents and three coir fibre lengths were used in this study. Performance evaluation of CBM modified with coir fibre was done through Retained Marshall Stability (RMS) test and Hamburg wheel tracking test. Coir fibre was added to the aggregates and mixed before the addition of pre-wetting water and emulsion, to achieve uniform distribution and to avoid balling of coir fibres. When coir fibre was added to the mix, Marshall Stability increased up to a certain level of coir fibre content depending on fibre length. Highest Marshall Stability value was obtained at 0.2% content (by weight of total mix) of coir fibre of 15 mm length. Resistance to moisture damage was assessed by RMS test. It was observed that the addition of coir fibre improved the RMS value. From the Hamburg wheel tracking test, it was observed that the addition of coir fibre improved rut resistance. For all fibre lengths, CBM with 0.2 % coir content showed the highest rut resistance, with 10 mm fibre length showed the best performance. Hence, coir fibre is recommended as a feasible additive for mechanical performance improvement of CBMs.
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Luersen, M. A., C. A. Steeves, and P. B. Nair. "Optimisation of a Laminated Composite Cylindrical Shell With Curvilinear Fibre Paths Using a Surrogate-Based Approach." In ASME 2014 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/imece2014-36285.

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Conventional design and manufacturing techniques of fibre-reinforced laminated materials keep the fibre orientation angle constant within each ply. However, with the development of advanced tow-placement technology it is now feasible to produce composites with curved fibres. This offers more flexibility to tailor the mechanical properties and improve the performance of laminated structures. In this paper, fibre path optimisation of a laminated cylindrical shell is studied. Curvilinear variations for the fibre orientations are adopted in the circumferential and longitudinal directions of the shell. In order to reduce the computational cost a surrogate-based optimisation strategy is proposed to pursue the optimum design. The laminated shell is subjected to bending and torsion loads and the maximum displacement magnitude is minimised while a constraint on the buckling load is imposed. Numerical studies are presented for two cases. First, only circumferential variation in the fibre orientations is considered. Then, circumferential and longitudinal variations are assumed.
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Reports on the topic "Fibre Optique"

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Griffiths, S. K., and R. H. Nilson. Optimum conditions for composites fiber coating by chemical vapor infiltration. Office of Scientific and Technical Information (OSTI), April 1997. http://dx.doi.org/10.2172/355006.

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Granot, David, Scott Holaday, and Randy D. Allen. Enhancing Cotton Fiber Elongation and Cellulose Synthesis by Manipulating Fructokinase Activity. United States Department of Agriculture, 2008. http://dx.doi.org/10.32747/2008.7613878.bard.

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a. Objectives (a) Identification and characterization of the cotton fiber FRKs; (b) Generating transgenic cotton plants overproducing either substrate inhibited tomato FRK or tomato FRK without substrate inhibition; (c) Generating transgenic cotton plants with RNAi suppression of fiber expressed FRKs; (d) Generating Arabidopsis plants that over express FRK1, FRK2, or both genes, as additional means to assess the contribution of FRK to cellulose synthesis and biomass production. b. Background to the topic: Cellulose synthesis and fiber elongation are dependent on sugar metabolism. Previous results suggested that FRKs (fructokinase enzymes that specifically phosphorylate fructose) are major players in sugar metabolism and cellulose synthesis. We therefore hypothesized that increasing fructose phosphorylation may enhance fiber elongation and cellulose synthesis in cotton plants. Accordinlgy, the objectives of this research were: c. Major conclusions and achievements: Two cotton FRKs expressed in fibers, GhFRK2 and GhFRK3, were cloned and characterized. We found that GhFRK2 enzyme is located in the cytosol and GhFRK3 is located within plastids. Both enzymes enable growth on fructose (but not on glucose) of hexose kinase deficient yeast strain, confirming the fructokinase activity of the cloned genes. RNAi constructs with each gene were prepared and sent to the US collaborator to generate cotton plants with RNAi suppression of these genes. To examine the effect of FRKs using Arabidopsis plants we generated transgenic plants expressing either LeFRK1 or LeFRK2 at high level. No visible phenotype has been observed. Yet, plants expressing both genes simultaneously are being created and will be tested. To test our hypothesis that increasing fructose phosphorylation may enhance fiber cellulose synthesis, we generated twenty independent transgenic cotton plant lines overexpressing Lycopersicon (Le) FRK1. Transgene expression was high in leaves and moderate in developing fiber, but enhanced FRK activity in fibers was inconsistent between experiments. Some lines exhibited a 9-11% enhancement of fiber length or strength, but only one line tested had consistent improvement in fiber strength that correlated with elevated FRK activity in the fibers. However, in one experiment, seed cotton mass was improved in all transgenic lines and correlated with enhanced FRK activity in fibers. When greenhouse plants were subjected to severe drought during flowering and boll development, no genotypic differences in fiber quality were noted. Seed cotton mass was improved for two transgenic lines but did not correlate with fiber FRK activity. We conclude that LeFRK1 over-expression in fibers has only a small effect on fiber quality, and any positive effects depend on optimum conditions. The improvement in productivity for greenhouse plants may have been due to better structural development of the water-conducting tissue (xylem) of the stem, since stem diameters were larger for some lines and the activity of FRK in the outer xylem greater than observed for wild-type plants. We are testing this idea and developing other transgenic cotton plants to understand the roles of FRK in fiber and xylem development. We see the potential to develop a cotton plant with improved stem strength and productivity under drought for windy, semi-arid regions where cotton is grown. d. Implications, scientific and agricultural: FRKs are probably bottle neck enzymes for biomass and wood synthesis and their increased expression has the potential to enhance wood and biomass production, not only in cotton plants but also in other feed and energy renewable plants.
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Iyer, Ananth V., Samuel Labi, Steven Dunlop, Thomas Brady Jr., and Eki Amijaya. Cost and Benefit Analysis of Installing Fiber Optics on INDOT Projects. Purdue University, 2020. http://dx.doi.org/10.5703/1288284317131.

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The Indiana Department of Transportation (INDOT) is tasked with the stewardship of billions of dollars’ worth of public invested highway infrastructure. Not only does INDOT continually seek design and operational policies that foster cost effective project delivery and procurement, they also seek opportunities for revenue generation. Due to population growth and the increased demand for online connectivity and global information transmission, the fiber-optic cable industry has experienced rapid growth over the past few years. Information and communication technology (ICT) companies have long sought to achieve higher economic productivity by installing fiber-optic cables in the right of way (ROW) of access-controlled highways. Based on these developments, an experiment was conducted to measure the economic impact in Indiana. To determine this impact, a database was developed by compartmentalizing the analysis into (1) GDP per county per industry type, (2) the natural growth of GDP as a factor, and (3) the extent of contribution of broadband in the growth of GDP. A general formula was developed to incorporate the adjusted median income on both the industry and county levels, along with a broadband contribution factor. This formula was employed to determine policies that can produce optimum economic outcome by leveraging the Pareto method.
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Beshouri and Huschenbett. PR-309-06201-R01 Pre-Production and Production Ion Sense Hardware and Cylinder Level Sensing. Chantilly, Virginia: Pipeline Research Council International, Inc. (PRCI), May 2013. http://dx.doi.org/10.55274/r0010544.

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In 2001, the Compressor and Pump Station Technical Committee (CAPSTC) recognized the importance of cylinder level sensing and control to minimize NOx emissions while maintaining optimum engine performance, therefore, a CAPSTC member brought the concept of ion sense to the committee as an alternative to fiber optic pressure sensors for continuous combustion performance monitoring. Derived from automotive technology, ion sense utilizes post ignition ionization measurements from a standard spark plug to monitor the combustions process. Based on successful feasibility tests at Colorado State University�s (CSU) GMV-4, the commercialization team focused their efforts on developing a product for Open Combustion Chamber (OCC) Two Stroke Cycle (2SC) lean burn engines. By 2010, the commercialization team of Advanced Engine Technologies Corporation (AETC), Altronic, and Mecel developed commercial hardware and conducted extensive mapping and long term testing on three different 2SC OCC engines operated by three different companies.
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Huang, Cihang, Yen-Fang Su, and Na Lu. Self-Healing Cementitious Composites (SHCC) with Ultrahigh Ductility for Pavement and Bridge Construction. Purdue University, 2021. http://dx.doi.org/10.5703/1288284317403.

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Cracks and their formations in concrete structures have been a common and long-lived problem, mainly due to the intrinsic brittleness of the concrete. Concrete structures, such as rigid pavement and bridge decks, are prone to deformations and deteriorations caused by shrinkage, temperature fluctuation, and traffic load, which can affect their service life. Rehabilitation of concrete structures is expensive and challenging—not only from maintenance viewpoints but also because they cannot be used for services during maintenance. It is critical to significantly improve the ductility of concrete to overcome such issues and to enable better infrastructure quality. To this end, the self-healing cementitious composites (SHCC) investigated in this work could be a promising solution to the aforementioned problems. In this project, the team has designed a series of cementitious composites to investigate their mechanical performances and self-healing abilities. Firstly, various types of fibers were investigated for improving ductility of the designed SHCC. To enhance the self-healing of SHCC, we proposed and examined that the combination of the internal curing method with SHCC mixture design can further improve self-healing performance. Three types of internal curing agents were used on the SHCC mixture design, and their self-healing efficiency was evaluated by multiple destructive and non-destructive tests. Results indicated a significant improvement in the self-healing capacity with the incorporation of internal curing agents such as zeolite and lightweight aggregate. To control the fiber distribution and workability of the SHCC, the mix design was further adjusted by controlling rheology using different types of viscosity modifiers. The team also explored the feasibility of the incorporation of colloidal nano-silica into the mix design of SHCC. Results suggest that optimum amounts of nano-silica have positive influence on self-healing efficiency and mechanical properties of the SHCC. Better hydration was also achieved by adding the nano-silica. The bonding strength of the SHCC with conventional concrete was also improved. At last, a standardized mixing procedure for the large scale SHCC was drafted and proposed.
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