Littérature scientifique sur le sujet « Communications sur Fibres Optiques »
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Articles de revues sur le sujet "Communications sur Fibres Optiques"
Kudlinski, Alexandre, Arnaud Mussot et Géraud Bouwmans. « Fibres optiques topographiques ». Photoniques, no 99 (novembre 2019) : 28–32. http://dx.doi.org/10.1051/photon/20199928.
Texte intégralLefebvre, Jean-Etienne, et Patrick Corlay. « Présentation d’un Kit pédagogique complet pour l’enseignement des transmissions sur fibre optique. » J3eA 21 (2022) : 2044. http://dx.doi.org/10.1051/j3ea/20222044.
Texte intégralLiégeois, Christian, Romualda Piel et Patrick Meyrueis. « Un nouveau matériau pour le multiplexage holographique sur réseau de fibres optiques ». Annales des Télécommunications 41, no 1-2 (janvier 1986) : 66–73. http://dx.doi.org/10.1007/bf02998272.
Texte intégralLeconte, Baptiste, Laurent Bigot, Philippe Roy, Raphael Jamier, Romain Dauliat, Marie-Alicia Malleville, Yves Quiquempois, Hicham El Hamzaoui et Olivier Vanvincq. « Lasers de forte puissance : vers l’avènement de fibres optiques à aire effective extrême ». Photoniques, no 99 (novembre 2019) : 23–27. http://dx.doi.org/10.1051/photon/20199923.
Texte intégralBeugnot, Jean-Charles, Philippe Djemia et Jérémie Margueritat. « Centenaire de la découverte de l’effet Brillouin ». Photoniques, no 114 (2022) : 26–29. http://dx.doi.org/10.1051/photon/202111426.
Texte intégralChmel, A., V. V. Baptizmanski et A. A. Kharshak. « Influence des défauts de la structure du verre sur la résistance mécanique des fibres optiques ». Journal de Physique III 2, no 12 (décembre 1992) : 2387–96. http://dx.doi.org/10.1051/jp3:1992252.
Texte intégralViste, Pierre. « Brevets en plasmonique : les tendances depuis 20 ans ». Photoniques, no 90 (janvier 2018) : 19–20. http://dx.doi.org/10.1051/photon/20189019.
Texte intégralde Sauvage, Jean, Fatima Tfayli, Thierry Dubreucq et Jean-Pierre Rajot. « Modélisation sous macrogravité d’une paroi clouée respectant le phasage de construction ». Revue Française de Géotechnique, no 166 (2021) : 5. http://dx.doi.org/10.1051/geotech/2021006.
Texte intégralViollier, E., G. Mignard, G. Sarazin, A. Choouier, G. Roziere et P. Trameson. « Une sonde photométrique pour l'analyse in situ : Principe, méthode, premiers essais ». Revue des sciences de l'eau 6, no 4 (12 avril 2005) : 395–410. http://dx.doi.org/10.7202/705182ar.
Texte intégralFouache, Eric, Adrien Marchiel, Alain Rabaute, Stéphane Desruelles, Christian Gorini, Nicoletta Bianchi, Raphaël Kerverdo et Sara Lafuerza. « Conséquences de la crue extrême du 2 octobre 2020 dans la vallée de la Roya (Alpes Maritimes) sur les réseaux de transport et de communication : leçons pour la reconstruction ». Flux N° 132, no 2 (18 août 2023) : 98–114. http://dx.doi.org/10.3917/flux1.132.0098.
Texte intégralThèses sur le sujet "Communications sur Fibres Optiques"
Lefebvre, Kim. « Technique de réutilisation de longueur d'onde optique dans des applications RoF basée sur les RSOA pour des communications bidirectionnelles OOK et OFDM ». Master's thesis, Université Laval, 2019. http://hdl.handle.net/20.500.11794/37718.
Texte intégralLiu, Jingtian. « Shaping Strategies to Embrace Nonlinear Effects in Optical Fiber Communications ». Electronic Thesis or Diss., Institut polytechnique de Paris, 2024. http://www.theses.fr/2024IPPAT007.
Texte intégralThe main impediment in long-distance communications is nonlinear interference (NLI), stemming from nonlinear effects in optical fibers. While Digital signal processing algorithms offer partial mitigation, the inherent nonlinear nature of the fiber, coupled with predominant dispersion effects, continues to challenge the increase of transmission throughputs. Addressing nonlinearity at the information source through signal modulation technology is at the heart of our research. Traditional modulation schemes, as spectral efficiency climbs, such as QAM, become increasingly susceptible to NLI while their Mean Squared Euclidean Distance (MSED) diminishes. While multi-dimensional (MD) modulation yields improved linear and partial nonlinear gains, it has not yet demonstrated tangible benefits. On the other hand, the emergence of probabilistic constellation shaping (PCS), preferred for its enhanced linear gain and compatibility with conventional modulation hardware and software, introduces additional NLI. Consequently, the design of nonlinear-tolerant PCS is emerging as a pivotal research direction. Our thesis begins with a novel MD modulation for uniformly distributed signals. Then, we propose a novel approach combining MD with PCS to examine performance variations. Delving into PCS, we investigate the enumerative sphere shaping distribution matcher (DM), initially from an MD stance, and design a DM optimized for nonlinear tolerance over shorter distances. Subsequently, we introduce a new NLI measurement technique, accounting for dispersion effects. Integrating this with the sequence selection framework of PCS, we achieve successful long-distance transmission with notable nonlinear gains
Nanni, Jacopo. « High performance, low cost and low consumption Radio over fiber Systems for diversified communications applications ». Thesis, Paris Est, 2018. http://www.theses.fr/2018PESC1162/document.
Texte intégralThis dissertation aims to analyze the possibility of improving in terms of cost and consumption the future Radio-over-Fiber (RoF) systems in different telecommunication scenarios, such as current and next generation of cellular networks and in other applications such as Radio Astronomy. The RoF system studied is hence composed of a Vertical Cavity Surface Emitting Laser (VCSEL) operating at 850 nm, standard single mode fiber (SSMF) and SiGe Heterojunction Phototransistor (HPT), adopting the technique called Intensity Modulation{Direct Detection which is nowadays the cheapest and simplest architecture for RoF. This dissertation describes in detail the multimode propagation within the SSMF (designed to operate only at 1310 nm and 1550 nm) which is present at 850 nm. Through a developed mathematical model, the two-modes propagation is described and the main phenomena involved are analyzed. In particular, the model focus on intermodal dispersion and modal noise which are considered the two main contributions of performance detrimental. The model developed is able to identify the main parameters which contribute to enhance the detrimental effects produced by intermodal dispersion and modal noise both in frequency and time domain. Starting from the model, possible techniques to improve the performances are then proposed. In particular, a pre-filtering technique is realized in order to avoid the excitation of the second order mode, allowing a quasi-single-modepropagation within the SSMF. The technique is theoretically and experimentally validated either for single radio frequency sinusoidal transmission either for bandpass signal transmission centered in radio frequency band. In particular it is demonstrated experimentally the possibility of increasing the modulationbandwidth of the RoF system, reducing at the same time the fluctuations of power and gain. Furthermore, the technique is validated in a real LTE transmission system, making the RoF technology proposed able to transmit 256-QAM LTE signal of 20 MHz bandwidth, confirming the possibility of using this technology to decrease the overall cost and consumption of the network. Further work hasbeen done on the mathematical model. In particular the two modes propagation is exploited reversely in order to characterize the chirp parameter of the VCSEL employed. Finally, the problem of coupling between fiber and opto-electronic devices is also discussed and investigated, in order to enhance theperformances while keeping low the cost. The possibility of utilizing a collective and passive ploymerbased structure for coupling the optical fiber with small area photodetectors and VCSEL is presented, showing important improvements on coupling efficiency and tolerance to misalignment
Holtz, Jürgen. « Codage pour les communications par fibres optiques / ». Paris : Ecole nationale supérieure des télécommunications, 1994. http://catalogue.bnf.fr/ark:/12148/cb357781974.
Texte intégralGuillory, Joffray. « Radio over Fiber (RoF) for the future home area networks ». Thesis, Paris Est, 2012. http://www.theses.fr/2012PEST1083/document.
Texte intégralThe evolution of the Home Area Network (HAN) is lead by the proliferation of connected devices inside the home and the deployment of high broadband access network which now allows the delivery of services that can exceed 1Gbit/s. To ensure efficient in-house exchanges, the HAN has to move rapidly toward multi-Gigabit/s connections, in particular the wireless connectivity generally preferred by the customers. Current wireless systems have limited capacities, but new radio standards delivering data-rates up to 7Gbit/s are emerging. Nevertheless, as they address the unlicensed millimeter-wave band, from 57 to 66 GHz, their radio coverage is limited to a single room. Indeed, at such frequencies, the free-space losses are high and the waves do not cross the walls. This thesis proposes to solve this problem by means of the Radio over Fiber (RoF) technology. This consists in capturing the 60GHz radio signals emitted in one room, converting them into optical signals for transmission through optical fibers, and reemitting them in another room. Thus, several RoF transducers will be installed in the home and interconnected by a suitable optical infrastructure to create systems acting at the same time as repeaters and as distribution systems. From the viewpoint of the HAN market, such systems will be competitive only if they are low cost. As a consequence, this work focuses on direct modulation with direct detection (IM-DD) at Intermediate Frequency (IF). In other words, the 60GHz signal is down-converted at a lower frequency around 5GHz before the laser modulation and up-converted to 60GHz after the photodetection. Concerning the optical fiber, silica multimode fiber (MMF) is privileged as it allows the use of low cost and largely available optoelectronic devices working at 850nm.The thesis proposes different RoF architectures, from point-to-point interconnecting two rooms to multipoint-to-multipoint acting as logical buses. After an analog characterization of the optoelectronic components, the RoF link and the domestic cable, these architectures are designed, built and characterized step by step using OFDM modulation according to existing wireless 60GHz standards. Real-time transmissions between commercial devices have also been performed to validate these architectures. Moreover, advanced RoF infrastructures are proposed. First, the RoF systems can be easily improved if the access to their optical media is managed by the radio MAC layer. This approach is therefore studied showing its feasibility. Secondly, an optical system, seen by users as a premium product, has to support the legacy home services commonly used as well as the new ones that could emerge in the future. Thus, innovative multiservice and multiformat infrastructures conveying on a unique optical cable wired IP data, broadcast terrestrial or satellite television, the 60GHz wireless connectivity, and specific formats as HDMI signals are proposed and tested
Audo, Frédéric. « Opto-alimentation et transmission de données par fibre optique pour les observatoires de fond de mer ». Phd thesis, Université de Bretagne occidentale - Brest, 2012. http://tel.archives-ouvertes.fr/tel-00782502.
Texte intégralLegros, Eric. « Photorecepteur integre pour transmission coherente sur fibres optiques ». Paris 11, 1993. http://www.theses.fr/1993PA112413.
Texte intégralBlayac, Sylvain. « Transistor bipolaire à double hétérojonction InP/GalnAs pour circuits de communications optiques à très haut débit ». Montpellier 2, 2001. http://www.theses.fr/2001MON20039.
Texte intégralCastan, Stéphanie. « Codage de canal pour les communications optiques ». Limoges, 2009. https://aurore.unilim.fr/theses/nxfile/default/ca31ecf8-c9ba-423d-93f5-ebe0d7929315/blobholder:0/2009LIMO4021.pdf.
Texte intégralThe work done in this study focuses on forward error correction used to compensate for performance degradations in fiber optical links, mainly corrupted by the quadratic photo detection process. When we consider a single user transmission, this process has an impact on the photo detected signal statistic, which can be represented as a chi-square function. Taking into account this statistic, the iterative decoding used for LDPC codes is modified in order to optimise the performance. In the case including Optical Code Division Multiple Access, mainly disrupted by Multiple Access Interference, photo detection induces beatings called beat noise. Studying the photo detected signal statistic leads us to establish a theoretical model based on a mixture of chi-square distribution. The error correction performance has been optimised by taking into account this model in the decoding process, which permits considering an application to multimedia transmissions
Zaganiaris, Alcibiade. « Contribution à l'évolution des techniques des communications optiques : des composants aux systèmes opérationnels ». Lyon 1, 1991. http://www.theses.fr/1991LYO19002.
Texte intégralLivres sur le sujet "Communications sur Fibres Optiques"
1939-, Bass Michael, Van Stryland Eric W et Optical Society of America, dir. Fiber optics handbook : Fiber, devices, and systems for optical communications. New York : McGraw-Hill, 2002.
Trouver le texte intégralFiber optic communications. 5e éd. Upper Saddle River, N.J : Pearson/Prentice Hall, 2005.
Trouver le texte intégralFiber optic communications. 2e éd. Englewood Cliffs, NJ : Prentice Hall, 1988.
Trouver le texte intégralPalais, Joseph C. Fiber optic communications. 3e éd. Englewood Cliffs, N.J : Prentice Hall, 1992.
Trouver le texte intégralFiber optic communications. 4e éd. Upper Saddle River, N.J : Prentice Hall, 1998.
Trouver le texte intégralFiber-optic communication systems. 3e éd. New York : Wiley-Interscience, 2002.
Trouver le texte intégralAgrawal, G. P. Fiber-optic communication systems. Chichester : Wiley, 1992.
Trouver le texte intégralFiber-optic communication systems. New York : Wiley, 1992.
Trouver le texte intégralAgrawal, G. P. Fiber-optic communication systems. 2e éd. New York : Wiley, 1997.
Trouver le texte intégralGoff, David R. Fiber optic reference guide : A practical guide to communications technology. Sous la direction de Hansen Kimberly S. 3e éd. Amsterdam : Focal Press, 2002.
Trouver le texte intégralActes de conférences sur le sujet "Communications sur Fibres Optiques"
Baranes, M., et T. Fortin. « Planification et chirurgie guidée - Avis d’experts : Apports des nouvelles technologies en implantologie : de la planification à la réalisation de la prothèse provisoire immédiate ». Dans 66ème Congrès de la SFCO. Les Ulis, France : EDP Sciences, 2020. http://dx.doi.org/10.1051/sfco/20206601011.
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