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Tesis sobre el tema "Generative Coherence"

Autor: Grafiati

Publicado: 7 de junio de 2025

Última modificación: 2 de agosto de 2025

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1

Kurdthongmee, Wattanapong. "Coherence in CSG image generation." Thesis, Brunel University, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.389260.

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2

Voratovic, Dayen Chad. "Generation and Detection of Coherent Pulse Trains in Periodically Poled Lithium Niobate Through Optical Parametric Amplification." University of Dayton / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1324406162.

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3

Haymaker, John R. (John Riker) 1966. "Filter mediated design : generating coherence in (collaborative) design." Thesis, Massachusetts Institute of Technology, 1999. http://hdl.handle.net/1721.1/66787.

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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Architecture, 1999.<br>Includes bibliographical references (leaves 67-69).<br>Architectural design involves the integration of diverse, sometimes conflicting, concepts and requirements into a coherent single composition. This paper proposes a method for negotiating architectural design across domains, by examining issues of ontology, perception, generation and evaluation, and detailing a prototype in which these mechanisms are augmented using computational agents for achieving coherence and innovation in remote collaborative design

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4

Ceugniet, Xavier, and VINCENT LEXTRAIT. "Generation de serveurs de vues. Coherence de representations externes distribuees." Nice, 1992. http://www.theses.fr/1992NICE4586.

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En depit de l'existence de nombreuses solutions partielles au probleme du maintien de la coherence d'informations distribuees, il existe peu d'outils qui adoptent l'architecture client/server, et savent s'inserer comme composants capables de dialoguer avec d'autres composants en s'adaptant a la structure et la logique d'interface souhaitees. Nous proposons une architecture nouvelle, fondee sur la centralisation d'une information abstraite, et la derivation de vues, de mecanismes d'actions et de notifications independants. Ce modele, baptise serveur de vues unifie un grand nombre de problemes.

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5

Gatt, Albert. "Generating coherent references to multiple entities." Thesis, University of Aberdeen, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.445144.

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Despite intensive research on the Generation of Referring Expressions (GRE), many GRE algorithms either lack empirical backing, or are motivated by concerns which arguably shift their focus away from the crucial problem, which is to generate natural descriptions, much as a person would generate them in a comparable situation. This problem becomes more acute in the case of plural reference. This thesis focuses on the generation of plurals, with particular attention to the semantic heart of the problem, that is, content determination. The first part presents an in-depth theoretical and empirical

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6

Hooper, Lucy. "Photonic crystal fibres for coherent supercontinuum generation." Thesis, University of Bath, 2012. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.557820.

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In this research photonic crystal fibres were developed for the purpose of generating coherent supercontinua. Two photonic crystal fibres were fabricated with all-normal group velocity dispersion profiles, with low dispersion at pump wavelengths 800 nm and 1064 nm. Supercontinua generated using these fibres were shown to have superior stability and coherence compared with supercontinua generated in fibres with anomalous dispersion at the pump wavelength. Using a short piece of photonic crystal fibre with all-normal group velocity dispersion, pumped at 1064 nm, a self phase modulation spectrum

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7

Thompson, Neil Roger. "Improved temporal coherence and short pulse generation in free electron lasers." Thesis, University of Strathclyde, 2013. http://oleg.lib.strath.ac.uk:80/R/?func=dbin-jump-full&object_id=22545.

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The output from a Self-Amplified Spontaneous Emission (SASE) Free-Electron Laser (FEL) has poor temporal coherence because the SASE process is a localised collective interaction that occurs on a scale far smaller than the typical length of the electron bunch used within the FEL. In this thesis a new technique, called High-Brightness SASE [1], is described in which the temporal alignment between radiation and electrons in the FEL is manipulated using magnetic chicanes. This delocalises the SASE process allowing the temporal coherence length of the radiation to grow exponentially and be extended

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8

Salières, Pascal. "Proprietes de coherence de la generation harmonique en champ laser intense." Paris 6, 1995. http://www.theses.fr/1995PA066205.

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Lorsqu'un champ laser interagit avec un milieu atomique, il genere un rayonnement aux frequences multiples de la frequence laser. Dans un regime de champ intense et de basse frequence, l'efficacite de generation harmonique reste constante jusqu'a des ordres tres eleves (region du spectre dite plateau), avant de chuter dans la coupure. Ce memoire presente une etude aussi bien experimentale que theorique de ces harmoniques d'ordre eleve, et de leurs proprietes de coherence. Dans un premier temps, nous etudions experimentalement les conditions propres a optimiser le rayonnement harmonique en ener

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9

LE, DEROFF LAURENT. "Etude des proprietes de coherence de la generation d'harmoniques d'ordre eleve : qualite du faisceau, coherence spatiale et temporelle et application." Paris 6, 1999. http://www.theses.fr/1999PA066615.

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Les travaux presentes dans ce memoire de these constituent une caracterisation avancee des proprietes de coherence de la generation d'harmoniques d'ordre eleve dans les gaz. Spatialement, nous avons d'une part caracterise le front d'onde du rayonnement harmonique autour de 60nm (h13), en mesurant la distribution spatiale de l'eclairement par foucaultage dans la region du foyer d'un miroir multicouche. Nous montrons qu'il est possible de generer un faisceau harmonique proche d'un faisceau gaussien, en limitant la pression atomique et la longueur du milieu. D'autre part, nous avons mesure le deg

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10

Abdo, Ahmad. "Algorithms for Next Generation Coherent Optical Networks." Thesis, Université d'Ottawa / University of Ottawa, 2018. http://hdl.handle.net/10393/38507.

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With the technological shift towards big data, internet of things (IoT), 5G applications and cloud computing, the demand for high capacity networks is dramatically increasing. To avoid congestion and saturation, content and service providers are re-designing their network (backbone, metro and data-centers interconnects) connectivity using gridless optical line systems along with programmable coherent transponders. The latter are expected to transmit data at different data rates up to 400 Gb/s. In 2008, the first coherent receiver was commercially available [1]. By means of high-speed ana

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11

Lytle, Amy Louise. "Phase matching and coherence of high-order harmonic generation in hollow waveguides." Connect to online resource, 2008. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:3315842.

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12

Wang, Hui. "ULTRA HIGH RESOLUTION AND CONTRAST SENSITIVE OPTICAL COHERENCE TOMOGRAPHY." Case Western Reserve University School of Graduate Studies / OhioLINK, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=case1207178563.

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13

Zhang, Xiaoshi. "Extreme nonlinear optics for coherent x-ray generation." Connect to online resource, 2007. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:3256470.

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14

Bin, Baqui Yamin. "Sound generation from coherent structures in subsonic jets." Thesis, University of Cambridge, 2015. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.709362.

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15

Tempus, Martin. "Generation and coherent transmission of mid-infrared radiation /." Bern, 1993. http://www.ub.unibe.ch/content/bibliotheken_sammlungen/sondersammlungen/dissen_bestellformular/index_ger.html.

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16

Song, Ge. "Sound generation by coherent structures in mixing layers." Phd thesis, Paris, ENSAM, 2012. http://pastel.archives-ouvertes.fr/pastel-00835374.

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A mixing layer is generally considered as a prototype of free shear flows whichoccur in a very broad spectrum of applications from natural phenomena to the engineeringscience. The increasing development of the aeroacoustics, more particularly thanks to theprogress in numerical simulations, has allowed to identify the coherent structures which evolvein the flow as the main sound sources. Furthermore, the emergence of the instability wavestaking the form of the coherent structures can be characterized by the stability analysis. In thiscontext, we propose through this work to perform a global sta

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17

Eigenwillig, Christoph. "New rapidly wavelength-swept light sources for optical coherence tomography and picosecond pulse generation." Diss., lmu, 2012. http://nbn-resolving.de/urn:nbn:de:bvb:19-149213.

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18

Lloyd, David T. "Characterizing the spatial properties of high harmonic generation." Thesis, University of Oxford, 2014. http://ora.ox.ac.uk/objects/uuid:4c51a956-b3a9-4172-ad17-0e9584a4ffa3.

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This thesis is concerned with describing a novel technique for characterizing the (spectrally resolved) spatial properties of light. The new approach, known as Scanning Interference Method for Integrated Transverse Analysis of Radiation (SCIMITAR), is a specific implementation of a variable-separation two-pinhole interferometer. Evaluation of the series of interference patterns produced by a SCIMITAR measurement allows the transverse profiles of intensity and spatial phase to be retrieved, while at the same time characterizing the spatial coherence of light. Including a diffraction grating in

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19

FERRARI, EUGENIO. "Advances in Seeded Free Electron Lasers: Generation and Control of Stable and Fully Coherent X-Ray Pulses in Conventional and Exotic Configurations." Doctoral thesis, Università degli Studi di Trieste, 2016. http://hdl.handle.net/11368/2908075.

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Since the discovery of lasers, the quest for new powerful sources of radiation has become an exciting fields of both fundamental and applied research. Indeed, light sources are nowadays one of the most powerful tools for matter investigation. Free electron lasers (FELs) represent the next step in the evolution of the light sources, with the potential to overcome the lack of coherent sources in the x-ray spectral range. After a general introduction to the characteristics and mechanisms of seeded FEL I will introduce the FERMI FEL facility, which is the first user facility in the XUV spectral r

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20

Mukherjee, Nandini. "Coherent Resonant Interaction and Harmonic Generation in Atomic Vapors." Thesis, North Texas State University, 1987. https://digital.library.unt.edu/ark:/67531/metadc332243/.

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This work examines the use of higher order multiphoton resonances in higher harmonic generation together with judicious exploitation of coherent interaction properties to achieve efficient harmonic generation. A detailed experimental study on third harmonic generation in two photon resonant coherent interaction and a theoretical study on four photon resonant coherent interaction have been conducted. Two photon resonant coheren propagation in lithium vapor (2S-4S and 2S-3D interaction) has been studied in detail as a function of phase and delay of the interacting pulse sequence. Under coherent

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21

Merkt, Frederic. "Generation and spectroscopic applications of coherent extreme ultraviolet (XUV) radiation." Thesis, University of Cambridge, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.240116.

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22

Tabares, Giraldo Jeison. "Transmission impairments mitigation in next generation coherent optical access networks." Doctoral thesis, Universitat Politècnica de Catalunya, 2021. http://hdl.handle.net/10803/672695.

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Worldwide, the coherent technologies have revolutionized the optical communication systems, significantly increasing the capacity of the fiber channel owing to transmission of advanced modulation formats and effective mitigation of propagation impairments. However, the actual commercial solutions for long-haul core/backbone networks are still complex and costly, and therefore hardly feasible for deployment in optical access networks. In particular, the main limitations arise from the customer premises equipment whose cost, footprint and power consumption may be kept down. Thus, the optimal sol

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23

Hu, Wen 1968. "Generation of coherent high-power microwave radiation with relativisitic electron beams." Thesis, Massachusetts Institute of Technology, 1994. http://hdl.handle.net/1721.1/28102.

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24

Curbis, Francesca. "Generation of VUV ultra-short coherent optical pulses using electron storage rings." Doctoral thesis, Università degli studi di Trieste, 2008. http://hdl.handle.net/10077/2562.

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2006/2007<br>The need of coherent and intense pulsed radiation is spread among many research disciplines, such as biology, nanotechnology, physics, chemistry and medicine. The synchrotron light from traditional sources only partially meets these characteristics. A new kind of light source has been conceived and developed in the last decades: the Free-Electron Laser (FEL). The FEL process relies on the interaction between a relativistic electron beam and an electromagnetic wave in presence of a static and periodic magnetic field, produced by a device called undulator. This interaction g

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25

Ling, Yuting. "Elastic characterization of ex vivo human prostate tissue using vibration optical coherence elastography and second harmonic generation microscopy." Thesis, University of Dundee, 2018. https://discovery.dundee.ac.uk/en/studentTheses/4c4f7057-aaf5-43b0-89c9-dc948e2698dc.

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26

Stensson, Katarina. "Generation and detection of non-classical photon states." Licentiate thesis, KTH, Tillämpad fysik, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-228058.

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This thesis intends to familiarize the reader with the concepts of photon statistics and correlations in quantum optics. Developing light sources that emit quantum states is central for the realization of quantum technologies. One important step in characterizing these sources is the measurement of field fluctuations and correlations, by coincidence measurements. The expectation value of a coincidence measurement, a simultaneous measurement of two intensities (or, more general, four fields), is represented by the fourth-order correlation function. The value of the correlation function, at zero

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27

Shahaf, Dafna. "Automatic Generation of Issue Maps: Structured, Interactive Outputs for Complex Information Needs." Research Showcase @ CMU, 2012. http://repository.cmu.edu/dissertations/210.

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When information is abundant, it becomes increasingly difficult to fit nuggets of knowledge into a single coherent picture. Complex stories spaghetti into branches, side stories, and intertwining narratives; search engines, our most popular navigational tools, are limited in their capacity to explore such complex stories. We propose a methodology for creating structured summaries of information, which we call metro maps. Our proposed algorithm generates a concise structured set of documents that maximizes coverage of salient pieces of information. Most importantly, metro maps explicitly show t

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28

Eigenwillig, Christoph [Verfasser], and Robert [Akademischer Betreuer] Huber. "New rapidly wavelength-swept light sources for optical coherence tomography and picosecond pulse generation / Christoph Eigenwillig. Betreuer: Robert Huber." München : Universitätsbibliothek der Ludwig-Maximilians-Universität, 2012. http://d-nb.info/1027669301/34.

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29

Zhi, Miaochan. "Broadband coherent light generation in Raman-active crystals driven by femtosecond laser fields." [College Station, Tex. : Texas A&M University, 2007. http://hdl.handle.net/1969.1/ETD-TAMU-2578.

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30

Cook, Alan Matthew. "Generation of narrow-band terahertz coherent Cherenkov radiation in a dielectric wakefield structure." Diss., Restricted to subscribing institutions, 2009. http://proquest.umi.com/pqdweb?did=1905663081&sid=1&Fmt=2&clientId=1564&RQT=309&VName=PQD.

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31

Lai, Chien-Jen Ph D. Massachusetts Institute of Technology. "Tabletop coherent extreme ultraviolet and soft X-ray sources based on high harmonic generation." Thesis, Massachusetts Institute of Technology, 2014. http://hdl.handle.net/1721.1/91106.

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Thesis: Ph. D., Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science, 2014.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (pages 105-115).<br>High harmonic generation (HHG) is a fascinating strong-field physics phenomenon that occurs when a laser pulse with a moderate intensity interacts with atoms and partially ionizes the atoms. A series of harmonics are generated at similar efficiencies and extend to a few tenth, even thousandth, order harmonics at the extreme ultraviolet (EUV) and soft X-ray range. Such an unprec

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32

Upadhya, Prasanth Chandrashekara. "Coherent generation and detection of Terahertz radiation : time domain Terahertz spectroscopy of molecular crystals." Thesis, University of Cambridge, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.614771.

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33

Zou, Ding, and Ivan B. Djordjevic. "FPGA-Based Rate-Compatible LDPC Codes for the Next Generation of Optical Transmission Systems." IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2016. http://hdl.handle.net/10150/621685.

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In this paper, we propose a rate-compatible forward error-correcting (FEC) scheme based on low-density-parity check (LDPC) codes together with its software reconfigurable unified field-programmable gate array (FPGA) architecture. By FPGA emulation, we demonstrate that the proposed class of rate-compatible LDPC codes based on puncturing and generalized LDPC coding with an overhead from 25% to 46% provides a coding gain ranging from 12.67 to 13.8 dB at a post-FEC bit-error rate (BER) of 10(-15). As a result, the proposed rate-compatible codes represent one of the strong FEC candidates of soft-de

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34

Chang, Juntao. "Characteristics of cooperative spontaneous radiation with applications to atom microscopy and coherent XUV radiation generation." [College Station, Tex. : Texas A&M University, 2008. http://hdl.handle.net/1969.1/ETD-TAMU-3226.

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35

Paul, Ariel J. "Coherent EUV light from high-order harmonic generation: Enhancement and applications to lensless diffractive imaging." Connect to online resource, 2007. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:3273819.

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36

Heidt, Alexander Matthias. "Novel coherent supercontinuum light sources based on all-normal dispersion fibers." Thesis, Stellenbosch : Stellenbosch University, 2011. http://hdl.handle.net/10019.1/17780.

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Thesis (PhD)--Stellenbosch University, 2011.<br>ENGLISH ABSTRACT: The concept of broadband coherent supercontinuum (SC) generation in all-normal dispersion (ANDi) fibers in the near-infrared, visible and ultraviolet (UV) spectral regions is introduced and investigated in detail. In numerical studies, explicit design criteria are established for ANDi photonic crystal fiber (PCF) designs that allow the generation of flat and smooth ultrabroad spectral profiles without significant fine structure and with excellent stability and coherence properties. The key benefit of SC generation in ANDi

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37

Taylor, Michael. "Ultrafast dynamics of the generation of coherent XUV sources and of proton induced processes in matter." Thesis, Queen's University Belfast, 2017. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.728675.

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38

Beaudoin, Bertrand Julien. "Homodyne High-harmonic Spectroscopy: Coherent Imaging of a Unimolecular Chemical Reaction." Thèse, Université d'Ottawa / University of Ottawa, 2012. http://hdl.handle.net/10393/23173.

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At the heart of high harmonic generation lies a combination of optical and collision physics entwined by a strong laser field. An electron, initially tunnel-ionized by the field, driven away then back in the continuum, finally recombines back to rest in its initial ground state via a radiative transition. The emitted attosecond (atto=10^-18) XUV light pulse carries all the information (polarization, amplitude and phase) about the photorecombination continuum-to-ground transition dipolar field. Photorecombination is related to the time-reversed photoionization process. In this perspective, hi

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39

HAROUTUNIAN, ROMAIN. "Sources xuv coherentes creees par laser femtoseconde : laser x et optimisation de la generation d'harmoniques d'ordre eleve." Palaiseau, Ecole polytechnique, 2001. http://www.theses.fr/2001EPXX0024.

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Les sources xuv possedent un veritable potentiel d'applications scientifiques, industrielles et medicales. En parallele avec l'evolution des lasers de puissance, les sources xuv coherentes creees par laser femtoseconde offrent une alternative en terme de cout et d'encombrement, par rapport au sources plus classiques telles que le synchrotron. Dans ce contexte, nous avons developpe au laboratoire d'optique appliquee deux types de sources xuv coherentes reposant sur l'interaction d'une impulsion femtoseconde intense avec un milieu dilue : le laser x et la generation d'harmoniques d'ordre eleve.

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40

Stepanov, Ivan Verfasser], Christoph [Akademischer Betreuer] Stampfer, and Gernot [Akademischer Betreuer] [Güntherodt. "Coherent electron Zitterbewegung : time-resolved electrical spin generation, manipulation and detection / Ivan Stepanov ; Christoph Stampfer, Gernot Güntherodt." Aachen : Universitätsbibliothek der RWTH Aachen, 2017. http://d-nb.info/116141181X/34.

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41

Stepanov, Ivan [Verfasser], Christoph Akademischer Betreuer] Stampfer, and Gernot [Akademischer Betreuer] [Güntherodt. "Coherent electron Zitterbewegung : time-resolved electrical spin generation, manipulation and detection / Ivan Stepanov ; Christoph Stampfer, Gernot Güntherodt." Aachen : Universitätsbibliothek der RWTH Aachen, 2017. http://d-nb.info/116141181X/34.

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42

Isautier, Pierre Paul Roger. "Autonomous receivers for next-generation of high-speed optical communication networks." Diss., Georgia Institute of Technology, 2015. http://hdl.handle.net/1853/54418.

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Advances in fiber optic communications and the convergence of the optical-wireless network will dramatically increase the network heterogeneity and complexity. The goal of our research is to create smart receivers that can autonomously identify and demodulate, without prior knowledge, nearly any signal emerging from the next-generation of high-speed optical communication networks.

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43

BANDIERA, Laura. "Study of coherent interactions between charged particle beams and crystals for beam steering and intense electromagnetic radiation generation." Doctoral thesis, Università degli studi di Ferrara, 2015. http://hdl.handle.net/11392/2389094.

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The work presented in this thesis has been devoted to the investigation of new schemes for beam steering and high-intense electromagnetic radiation generation through coherent interactions of charged particle beams with crystals. A series of experiments was carried out in two different laboratories, i.e., the Super Proton Synchrotron (SPS) at CERN in Geneve and the MAinzer MIkrotron (MAMI) of the University of Mainz in Germany, by different international and national collaborations, namely the UA9 experiment., the European CUTE project and the INFN COHERENT and ICE-RAD experiments. The

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44

Kriouile, Abderahman. "Formal methods for functional verification of cache-coherent systems-on-chip." Thesis, Université Grenoble Alpes (ComUE), 2015. http://www.theses.fr/2015GREAM041/document.

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Les architectures des systèmes sur puce (System-on-Chip, SoC) actuelles intègrent de nombreux composants différents tels que les processeurs, les accélérateurs, les mémoires et les blocs d'entrée/sortie, certains pouvant contenir des caches. Vu que l'effort de validation basée sur la simulation, actuellement utilisée dans l'industrie, croît de façon exponentielle avec la complexité des SoCs, nous nous intéressons à des techniques de vérification formelle. Nous utilisons la boîte à outils CADP pour développer et valider un modèle formel d'un SoC générique conforme à la spécification AMBA 4 ACE

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45

STRAULLU, STEFANO. "Next generation optical access networks towards Gigabit/s per user." Doctoral thesis, Politecnico di Torino, 2015. http://hdl.handle.net/11583/2592360.

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At the time of writing this Ph.D. thesis, FSAN (Full Service Access Network) and ITU-T (International Telecommunication Union – Telecommunication Standardization Bureau) working groups are involved in the final definition of the Recommendation G.989, which has recently established that the Next Generation Passive Optical Network (NG-PON2) architecture will be based on Time- and Wavelength-Division Multiplexed PON (TWDM-PON), and it will consist in its first version on four wavelength-stacked XG-PONs using four wavelengths per direction, likely with a very narrow (for PON) spacing of 100 GHz or

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46

Grattoni, Vanessa [Verfasser], and Wolfgang [Akademischer Betreuer] Hillert. "Advanced seeding methods for generation of fully-coherent ultra-short soft x-ray pulses / Vanessa Grattoni ; Betreuer: Wolfgang Hillert." Hamburg : Staats- und Universitätsbibliothek Hamburg, 2020. http://d-nb.info/1218688424/34.

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47

Jacqmin, Hermance. "Coherent combining of few-cycle pulses for the next generation of Terawatt-class laser sources devoted to attosecond physics." Thesis, Université Paris-Saclay (ComUE), 2016. http://www.theses.fr/2016SACLX064/document.

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Cette thèse s’inscrit dans le cadre du développement d’une source laser TW, de cadence élevée, stabilisée en phase, et délivrant des impulsions de quelques cycles optiques pour explorer la physique attoseconde. De telles impulsions contiennent seulement quelques oscillations de l’onde porteuse (durée de 5 fs à une longueur d’onde centrale de 800 nm) et ne sont pas directement disponibles à la sortie d’une source laser femtoseconde classique. Une technique de post-compression efficace pour obtenir de telles impulsions consiste à élargir le spectre des impulsions laser par automodulation de phas

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48

Simoncig, Alberto. "The role of the electron recoiling mechanism in coherent light high-order harmonics generation: from the source to the applications." Doctoral thesis, Università degli studi di Trieste, 2010. http://hdl.handle.net/10077/3581.

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2008/2009<br>I processi di generazione di armoniche di ordine superiore (High-order Harmonic Generation o HHG) in gas inerti rappresentano, attualmente, la tecnica piu` promettente per la creazione di impulsi di luce coerente nell'estremo ultra-violetto (EUV) in una configurazione table-top. I processi HHG si basano sull'interazione non-lineare, tra impulsi laser ultra-corti, tipicamente dell'ordine della decina di femtosecondi, e atomi di gas inerti. Le caratteristiche che distinguono i processi HHG sono la loro durata temporale, che puo` essere nel dominio degli attosecondo e il fatto che

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49

Dacasa, Pereira Hugo. "Spatial and temporal metrology of coherent ultrashort pulses inthe extreme-ultraviolet domain." Thesis, Université Paris-Saclay (ComUE), 2017. http://www.theses.fr/2017SACLX041/document.

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Les impulsions ultra-brèves de rayonnement ultraviolet extrême (UVX) ont un grand champ d’application dans les domaines tels que le diagnostic de plasmas, la spectroscopie ou l’étude de la dynamique ultrarapide dans les atomes et les molécules.Aujourd’hui, il existe trois sources délivrant ce genre d’impulsions. Les harmoniques d’ordre élevé (HHG, en anglais) générés dans les gaz rares ou sur les solides peuvent fournir des impulsions attosecondes. Cependant, leur énergie, le plus souvent de l’ordre du nanojoule, limite les applications. L’amplification des impulsions harmoniques dans les plas

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50

Hinkelmann, Moritz [Verfasser]. "Compact and efficient sub-10 ps pump sources at 2 µm for the generation of coherent mid-infrared radiation / Moritz Hinkelmann." Hannover : Gottfried Wilhelm Leibniz Universität Hannover, 2020. http://d-nb.info/1205878475/34.

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