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Dissertations / Theses on the topic 'SINGLE POLARIZATION'

Author: Grafiati

Published: 11 September 2023

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1

Fosuhene, Samuel Kofi. "Single-end reflectometric measurements of polarization-mode dispersion in single-mode optical fibres." Thesis, Nelson Mandela Metropolitan University, 2013. http://hdl.handle.net/10948/6280.

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In this thesis two novel single-end methods are applied to measure and characterize polarization mode dispersion in single mode optical fibres. Polarization mode dispersion (PMD) is an important factor negatively affecting the successful implementation of high speed long haul optical fibre networks operating at bit rates of 10Gb/s and above. PMD measurements are thus important for quality control during manufacturing and cabling processes. It is also useful for network operators planning to upgrade bitrates in existing networks to 10Gb/s and beyond. In an optical fibre link, sections with part

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2

Cottle, Paul Wesley. "Aerosol type analysis with single wavelength, dual polarization elastic LIDAR." Thesis, University of British Columbia, 2016. http://hdl.handle.net/2429/57069.

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Aerosols play an important role in many atmospheric processes but their highly heterogeneous nature makes them difficult to study. Thus, new advancements in the field frequently focus on finding ways to more accurately determine more information about aerosols as they occur. LIght Detection And Ranging (LIDAR) systems have become an important tool in the study of aerosols because they can provide high resolution vertical profiles of quantities of interest (including aerosol concentrations, temperature, and wind speed, among others) over several kilometres of altitude. But on the other hand, t

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3

Damato, Ralph. "Polarization control of plasmonic modes in single nanoparticles and nanostructures." Thesis, California State University, Long Beach, 2014. http://pqdtopen.proquest.com/#viewpdf?dispub=1527542.

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<p> This thesis investigates the fundamental nanoscale near-field light matter interaction between a probe tip and plasmonic antenna nanostructures. The thesis is focused on polarization control of metallic plasmon modes using scattering-type scanning near-field optical microscopy (s-SNOM). Part of the thesis is dedicated to spectroscopic near-field comparison of coated and bare single plasmonic particles in the infrared wavelength range (λ= 9–11 µm) using s-SNOM. By tuning the wavelength of the incident light, we have acquired information on the spectral polarization depend

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4

Suarez, Yana Elmer Eduardo. "Topological phases generated with single photons entangled in polarization and momentum." Master's thesis, Pontificia Universidad Católica del Perú, 2016. http://tesis.pucp.edu.pe/repositorio/handle/123456789/7437.

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El entrelazamiento puede abordarse desde dos perspectivas diferentes: como un recurso esencial para las tecnologías cuánticas y como un fenómeno fundamental que está íntimamente relacionado con nuestra comprensión de la naturaleza misma. Por otro lado, la teoría cuántica se formula en el marco teórico de los espacios de Hilbert, para los que el entrelazamiento juega un papel importante en la determinación de su geometría y topología. Las características topológicas que puedan exhibirse al utilizar estados entrelazados son largamente independientes de la realización física particular del entrel

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5

Robinson, Risa J. "Polarization modulation and splicing techniques for stressed birefringent fiber /." Online version of thesis, 1995. http://hdl.handle.net/1850/12228.

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6

Sun, Xiaohu. "Top polarization measurement in single top quark production with the ATLAS detector." Thesis, Grenoble, 2013. http://www.theses.fr/2013GRENY081/document.

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La polarisation du quark top produit par interaction électrofaible (single-top) en voie-t permet de tester la structure du vertex Wtb: le couplage vecteur gauche prévu dans le cadre du Modèle Standard (MS), ainsi que les couplages anormaux vecteur ou tenseur introduits par plusieurs théories au-delà du Modèle Standard. Le lot de données correspondant à une luminosité integrée de 4,7 fb-1 recolté dans les collisions proton-proton à une énergie de 7 TeV dans le centre de masse offre une chance de mesurer la polarisation du quark top. Cette thèse traite de la mesure de la polarisation du quark to

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7

Li, Tiesheng. "Optical properties of CdTe/Cd1-xZnxTe strained-layer single quantum wells." Ohio : Ohio University, 1993. http://www.ohiolink.edu/etd/view.cgi?ohiou1173760803.

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8

DeGrush, Adam (Adam Jon). "Single and double polarization observables in the electrodisintegration of the deuteron from BLAST." Thesis, Massachusetts Institute of Technology, 2010. http://hdl.handle.net/1721.1/62644.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Physics, 2010.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (p. 217-221).<br>Understanding the underlying mechanisms involved in the interactions between nucleons is one of the fundamental problems in nuclear physics. Over roughly the last 70 years, this question has been approached on many different fronts. We believe that the theory underlying the interaction between nucleons is that between quarks and gluons described by Quantum Chromodynamics; however, a complete solution to the nucleon-nucl

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9

Sala, Vera Giulia. "Coherence, dynamics and polarization properties of polariton condensates in single and coupled micropillars." Paris 6, 2013. http://www.theses.fr/2013PA066712.

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Microcavity polaritons are mixed light-matter quasiparticles arising from the strong coupling between quantum well excitons and photons confined in a Fabry-Perot microcavity. Their bosonic nature along with the strong interparticle interactions makes polaritons an excellent solid-state platform to study the nonlinear properties of bosonic condensates, with the advantage of being addressable using standard optical techniques. An important degree of freedom in the study of polaritons is the possibility to introduce a lateral confining potential. The growth and etching techniques developed at LPN

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10

Kolano, Michael [Verfasser]. "Design and characterization of a single-laser polarization-controlled optical sampling system / Michael Kolano." München : Verlag Dr. Hut, 2019. http://d-nb.info/1198542748/34.

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11

Hoover, Diana Kay Yousaf Muhammad. "Electroactive nanoarrays for the biospecific-ligand mediated study of single cell adhesion and polarization." Chapel Hill, N.C. : University of North Carolina at Chapel Hill, 2009. http://dc.lib.unc.edu/u?/etd,2591.

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Thesis (Ph. D.)--University of North Carolina at Chapel Hill, 2009.<br>Title from electronic title page (viewed Oct. 5, 2009). "... in partial fulfillment of the requirements for the degree of Doctor of Philosophy in the Department of Chemistry Analytical Chemistry. " Discipline: Chemistry; Department/School: Chemistry.

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12

Maletinsky, Patrick. "Polarization and manipulation of a mesoscopic nuclear spin ensemble using a single confined electron spin /." Zürich : ETH, 2008. http://e-collection.ethbib.ethz.ch/show?type=diss&nr=17815.

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13

SOUZA, KAROLINE DE. "IMPACT OF THE EFFECTS OF PMD IN THE LIGHT POLARIZATION CONTROL IN SINGLE-MODE FIBERS." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2011. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=35252@1.

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PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO<br>CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO<br>Este trabalho apresenta o estudo e a realização de experimentos a fim de investigar os efeitos da PMD (Polarization Mode Dispersion) no controle de polarização implementado em um enlace de fibra óptica monomodo. Esse estudo permitirá a otimização de controladores de polarização em sistemas de transmissão que venham a utilizar multiplexação em polarização (PolMux) combinado a técnicas de UDWDM (Ultra Dense Wavelength Division Multiplexing), possibilitando o aumento da taxa de t

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14

Wu, Jingwei, Xiushan Zhu, Valery Temyanko, LaComb L. Valery, R. A. Norwood, and N. Peyghambarian. "Power scaling of single-frequency fiber amplifiers at 976 nm." IEEE, 2016. http://hdl.handle.net/10150/622788.

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Cladding pumped single-frequency Yb3+-doped fiber amplifiers at 976 nm were investigated. Over 4 W output power was obtained and further power scaling can be achieved by reducing the cladding diameter of the Yb3+-doped fiber.

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15

Liao, Chen-Ting, and Arvinder Sandhu. "XUV Transient Absorption Spectroscopy: Probing Laser-Perturbed Dipole Polarization in Single Atom, Macroscopic, and Molecular Regimes." MDPI AG, 2017. http://hdl.handle.net/10150/624358.

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We employ an extreme ultraviolet (XUV) pulse to impulsively excite dipole polarization in atoms or molecules, which corresponds to coherently prepared superposition of excited states. A delayed near infrared (NIR) pulse then perturbs the fast evolving polarization, and the resultant absorbance change is monitored in dilute helium, dense helium, and sulfur hexafluoride (SF6) molecules. We observe and quantify the time-dependence of various transient phenomena in helium atoms, including laser-induced phase (LIP), time-varying (AC) Stark shift, quantum path interference, and laser-induced continu

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16

Pumpa, Martin. "Single Molecule Diffusion in Liquid Crystals." Doctoral thesis, Universitätsbibliothek Leipzig, 2014. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-157717.

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The present work introduces a new method that is used to explore the connection between molecular order and molecular dynamics in liquid crystals. In liquid crystals, the building blocks show a liquid like disorder in at least one dimension of space with an otherwise crystalline like positional or orientational long range order. A new microscope is introduced that combines polarization measurements with the ability to track single fluorescent probe molecules in a thin sample of ordered liquid crystal. A new method for the analysis of orientation dependent diffusion is also introduced. It can b

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17

Esteban, i. Ferrer Daniel. "Electric polarization properties of single bacteria measured with electrostatic force microscopy. Theoretical and practical studies of Dielectric constant of single bacteria and smaller elements." Doctoral thesis, Universitat de Barcelona, 2014. http://hdl.handle.net/10803/284622.

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The present thesis is included in the field of nanobioelectricity. That is, understanding the electrical properties of biological specimens at the nanoscale (< 200 nm). To do so we used an electrical variation of the Atomic Force Microscope called Electrostatic Force Microscope (EFM). By the application of a novel methodology (experimental and theoretical) we were able to obtain electrical polarization properties of single bacteria. Firstly the methodology was applied to calibration samples were the dielectric constant was already known. The obtained value for a silicon nitride sample was

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18

Harwood, Peter, Christopher Wilson, Arthur Sullivan, and Eugene Augustin. "LOW COST, HIGHLY TRANSPORTABLE, TELEMETRY TRACKING SYSTEM FEATURING THE AUGUSTINE/SULLIVAN DISTRIBUTION AND POLARIZATION, FREQUENCY AND SPACE DIVERSITY." International Foundation for Telemetering, 1996. http://hdl.handle.net/10150/608364.

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International Telemetering Conference Proceedings / October 28-31, 1996 / Town and Country Hotel and Convention Center, San Diego, California<br>The tracking system is part of a telemetry ground station being developed for the UK Ministry of Defence. The design objective is a self-contained transportable system for field use in a vehicle or workshop environment, so that the system components are required to be man portable. Comprehensive facilities are required for the reception, display and analysis of telemetry data from a remote 1430-1450MHz airborne source at ranges of up to 205km. Si

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19

Sudradjat, Faisal. "50%-50% Beam Splitters Using Transparent Substrates Coated by Single- or Double-Layer Quarter-Wave Thin Films." ScholarWorks@UNO, 2006. http://scholarworks.uno.edu/td/376.

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A pair of light beams that have orthogonal polarizations and equal intensity can be generated through reflection and refraction of a monochromatic light at a dielectric surface. Sytematic procedures to design beam splitters which can produce such output light beams are described in this thesis. Two designs that are of particular interest are prismatic substrates coated by a single layer and a double layer of thin films. Specific examples of each beam splitter in the visible and infrared are included. The performance of each beam splitter as a function of incidence angle, film thicknes

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20

Critchley, Jacques R. (Jacques Rigby). "Employment, gender and household polarization in a single industry town : the social impacts of economic restructuring in Windsor, Quebec." Thesis, McGill University, 1990. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=59659.

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This thesis, from a "locality studies" perspective, examines the impact of industrial restructuring and employment decline on the relationship between locality, gender and patriarchy at the household level in Windsor, a pulp and paper mill town in South-Eastern Quebec. A detailed questionnaire/survey was deployed in May and June 1987, during a period of massive reorganization and automation of production by Domtar Fine Paper Mill, the dominant local employer. The primary empirical focus of this work is on the household impacts of job losses, incurred directly or indirectly by this restructurin

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21

Nasse, Michael Johannes. "Development of a Confocal and Near-field Scanning Optical Microscope for Polarization-resolved Temporal Studies of Single Nano-objects." Université Joseph Fourier (Grenoble), 2004. http://www.theses.fr/2004GRE10235.

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Nous présentons le développement et les applications d'un microscope dual fonctionnant soit en mode confocal soit en champ proche optique à ouverture et opérant en mode réflexion. Il a été conçu pour travailler à basse température et sous atmosphère contrôlée. De plus, il permet de séparer les deux directions de polarisation de la fluorescence récoltée. Nous avons étudié comme nano-objets des molécules et nanosphères fluorescentes ainsi que des nanocristaux semi-conducteurs. Comme échantillons moléculaires nous avons utilisé des molécules diI-C18 et des molécules dérivées d'anthracène. Les spe

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22

Liu, Tieqi. "Electromechanical Behavior of Relaxor Ferroelectric Crystals." Diss., Georgia Institute of Technology, 2004. http://hdl.handle.net/1853/4881.

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Relaxor ferroelectric PZN-xPT and PMN-xPT single crystals exhibit extraordinary electromechanical properties. They are under development for applications in sensors, actuators and transducers. The polarization switching and phase transition behavior of PZN-4.5%PT and PMN-32%PT single crystals under external loading has been investigated. Experimental investigation elucidates the polarization switching and phase transition behavior of relaxor ferroelectric crystals at different orientation cuts under combined temperature, electric field and stress loading. These crystals exhibit strong orientat

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23

Sturm, Chris, Rüdiger Schmidt-Grund, Vitaly Zviagin, and Marius Grundmann. "Temperature dependence of the dielectric tensor of monoclinic Ga2O3 single crystals in the spectral range 1.0–8.5 eV." American Institute of Physics, 2017. https://ul.qucosa.de/id/qucosa%3A25613.

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The full dielectric tensor of monoclinic Ga2O3 (β-phase) was determined by generalized spectroscopic ellipsometry in the spectral range from 1.0 eV up to 8.5 eV and temperatures in the range from 10K up to 300K. By using the oriented dipole approach, the energies and broadenings of the excitonic transitions are determined as a function of the temperature, and the exciton-phonon coupling properties are deduced.

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24

Chiarello, Fabrizio. "Analysis and application of nonlinear amplification effects in single-mode optical fibers." Doctoral thesis, Università degli studi di Padova, 2014. http://hdl.handle.net/11577/3423797.

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This thesis focuses on all-optical signal generation and processing through nonlinear amplification phenomena in single-mode fibers. Three different nonlinear fiber optical oscillators are investigated and experimentally demonstrated. A continuous-wave pump for fiber Raman amplifiers, developed with the goal of achieving high degree of polarization, tunability and suppression of stimulated Brillouin scattering, is presented, discussed and used to achieve nonlinear polarization attraction. A fast and widely tunable fiber optical oscillator based on stimulated Raman scattering and on broad- a

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25

Feng, Fu. "Coupling between optical Tamm states and fluorescent nanocrystals ; determination of the dipole nature of single colloidal nanoplatelets." Thesis, Paris 6, 2016. http://www.theses.fr/2016PA066564/document.

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Ce travail de thèse porte sur le couplage d’émetteurs fluorescents (en l’occurrence des nanostructures semi-conductrices colloïdales) à leur environnement optique. Il se décompose en deux parties : dans la première, des structures photoniques (modes de Tamm optiques) sont caractérisées par le biais de la fluorescence de nanocristaux insérés dans ces structures. Dans la seconde, des nanoplaquettes individuelles de CdSe/CdS sont caractérisées par des études de microphotoluminescence sur différents types de substrats. Dans ces deux études, la mesure du diagramme de rayonnement par imagerie dans l

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26

Yurdanur, Tasel Elif. "Elemental Analysis Of Materials Including Silicon (100) And (111) Crystals With Single And Double Pulsed Libs." Phd thesis, METU, 2011. http://etd.lib.metu.edu.tr/upload/12614304/index.pdf.

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Laser Induced Breakdown Spectroscopy (LIBS) which is used to determine the elemental content of various samples, inspects the emission spectroscopy of samples of interest for searching certain elements or identifying the unknown content. In this study, spectroscopic analyses of various kinds of metals, namely, Cu, Fe, Mo, Ti, W, some compounds such as CuBe, ZnSe, ZnS, GaSe, some semimetals like Si, Ge and even gases were investigated by means of a compact-commercial portable LIBS system and an independently constructed experimental set-up consisting of a single pulse system and various kinds o

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27

Koehler, Jana [Verfasser]. "Studying large-scale structures and polarization of the Northern sky facilitating single-station data of the Low Frequency Array (LOFAR) / Jana Koehler." Bonn : Universitäts- und Landesbibliothek Bonn, 2016. http://d-nb.info/1113688378/34.

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28

Schäfer, Philip Sudadyo. "Tuning of color and polarization of the fluorescence of nano-ribbons using laser microscopy and controlled self-assembly." Thesis, Bordeaux, 2016. http://www.theses.fr/2016BORD0435/document.

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Des matériaux ayant des propriétés émissives spécifiques peuvent être obtenus par l'organisation contrôlée de fluorophores aux échelles moléculaire, nano- et micro-métrique. Dans ce travail, l'émission de lumière bleue polarisée est obtenue par l'auto-assemblage hautement anisotrope de n-acènes alcoxylés en nano-rubans. Des techniques de microscopie de fluorescence ont été utilisées pour déterminer le mécanisme de leur croissance et ont été combinées à la cristallographie aux rayons X pour déterminer l'empilement moléculaire dans les nano-objets. L'étude a révélé que la formation des nano-ruba

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29

Kaassamani, Shatha. "Polarization Spectroscopy of High Order Harmonic Generation in Semiconductors Orbital angular momentum from semiconductor high-order harmonics All semiconductor enhanced highharmonic generation from a single nanostructured cone." Thesis, université Paris-Saclay, 2020. http://www.theses.fr/2020UPASP091.

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Depuis sa première observation, la génération d'harmonique d'ordre élevé (HHG) dans les cristaux s'est avérée d'être une source efficace, contrôlable et compacte de rayonnement XUV cohérent. Dans cette thèse, nous étudions la génération d'harmonique d'ordre élevé (HHG) dans le graphène, et dans différents semi-conducteurs principalement oxyde de zinc, silicium, arséniure de gallium et oxyde de magnésium. Nous observons que les propriétés du laser, notamment l'intensité, polarisation et ellipticité ainsi que les propriétés du cristal impactent de manière corrélée au processus de génération d'ha

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30

Luo, Yun. "Crystal Chemistry of U and Th in Apatite." Miami University / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=miami1272635731.

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31

Almeida, Álvaro José Caseiro de. "Quantum communications in optical fibers." Doctoral thesis, Universidade de Aveiro, 2016. http://hdl.handle.net/10773/16306.

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Doutoramento em Engenharia Física<br>This thesis begins by proposing the implementation of a probabilistic photon source based on the stimulated four-wave mixing (FWM) process. This source was implemented experimentally and characterized in terms of its statistical distribution. Next, the impact of the stimulated FWM process in a co-propagating quantum signal was studied experimentally. Finally, the violation of Clauser-Horne-Shimony-Holt (CHSH) inequality was experimentally veriﬁed using polarization-entangled photon pairs, which were obtained from the spontaneous FWM process in a Sagnac loop

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Sarabia, Francisco J. "Interfacial studies of Pt and Cu single-crystal electrodes modified by transition metal deposition." Doctoral thesis, Universidad de Alicante, 2021. http://hdl.handle.net/10045/118535.

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El conocimiento de las características interfaciales es de suma importancia para poder desarrollar materiales que sean capaces de dar lugar a reacciones electrocatalíticas eficientes. Por esta razón, en esta tesis se muestran diferentes estudios interfaciales sobre superficies monocristalinas de platino y cobre en diferentes electrolitos. Además se estudian las características de la interfase electrodoldisolución con superficies de platino modificadas con adátomos de hierro, cobalto y níquel. Para ello, se han empleado las técnicas de voltametría cíclica, espectroscopía infrarroja con transfor

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33

Tomba, Caterina. "Primary brain cells in in vitro controlled microenvironments : single cell behaviors for collective functions." Thesis, Grenoble, 2014. http://www.theses.fr/2014GRENY039/document.

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Du fait de sa complexité, le fonctionnement du cerveau est exploré par des méthodes très diverses, telles que la neurophysiologie et les neurosciences cognitives, et à des échelles variées, allant de l'observation de l'organe dans son ensemble jusqu'aux molécules impliquées dans les processus biologiques. Ici, nous proposons une étude à l'échelle cellulaire qui s'intéresse à deux briques élémentaires du cerveau : les neurones et les cellules gliales. L'approche choisie est la biophysique, de part les outils utilisés et les questions abordées sous l'angle de la physique. L'originalité de ce tra

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Romagnoli, Priscila. "Modelamento, fabricação e caracterização de seções polarizadoras em fibras de cristal fotônico altamente birrefringentes." Universidade Presbiteriana Mackenzie, 2013. http://tede.mackenzie.br/jspui/handle/tede/1426.

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Made available in DSpace on 2016-03-15T19:37:43Z (GMT). No. of bitstreams: 1 Priscila Romagnoli.pdf: 2103605 bytes, checksum: 61f6314f8d7400988a432b7a4793d4be (MD5) Previous issue date: 2013-01-24<br>Photonic crystal fibers have been proposed as single-polarization (or polarizing) fibers with important applications being demonstrated, for example, in telecommunications, sensing and georeferencing. Although the vast majority of reported studies have focused on the numerical analysis of the performance of PCFs with specific and unconventional designs, post-processing PCFs also allows for great

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Shakya, Mahendra Man. "Generation of intense high harmonics : i) to test and improve resolution of accumulative x-ray streak camera ii) to study the effects of carrier envelope phase on XUV super continuum generation by polarization gating." Diss., Manhattan, Kan. : Kansas State University, 2007. http://hdl.handle.net/2097/408.

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大智, 東., та Daichi Higashi. "リフレクトアレーアンテナの広帯域化および偏波特性制御のための高性能共振素子形状に関する研究". Thesis, https://doors.doshisha.ac.jp/opac/opac_link/bibid/BB13128124/?lang=0, 2019. https://doors.doshisha.ac.jp/opac/opac_link/bibid/BB13128124/?lang=0.

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本研究は, 広帯域直交偏波共用低交差偏波特性, 偏波変換特性および任意の反射位相差を有する高性能・高機能リフレクトアレー共振素子の開発を行い, 設計・試作したリフレクトアレーアンテナの放射特性の数値的及び実験的検討の研究成果をまとめたものである.<br>博士(工学)<br>Doctor of Philosophy in Engineering<br>同志社大学<br>Doshisha University

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Ahmed, Haitham Ahmed Shaban. "Quantitative molecular orientation imaging of biological structures by polarized super-resolution fluorescence microscopy." Thesis, Aix-Marseille, 2015. http://www.theses.fr/2015AIXM4323.

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Dans cette thèse, nous avons construit et optimisé des méthodes de microscopie de fluorescence super-résolue stochastique, polarisée et quantitative qui nous permettent d'imager l'orientation moléculaire dans des environnements dynamiques et statiques a l’échelle de la molécule unique et avec une résolution nanoscopique. En utilisant un montage de microscopie super-résolue à lecture stochastique en combinaison avec une détection polarisée, nous avons pu reconstruire des images d'anisotropie de fluorescence avec une résolution spatiale de 40 nm. En particulier, nous avons pu imager l'ordre orie

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Ferrage, Fabien. "Spectroscopie du proton en RMN hétéronucléaire des biomolécules : la polarisation croisée de transitions uniques et les échos stimulés hétéronucléaires." Paris 6, 2002. http://www.theses.fr/2002PA066139.

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39

Hase, Michal. "Návrh antény s kruhovou polarizací pro kmitočtové pásmo 2,4 GHz." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2008. http://www.nusl.cz/ntk/nusl-217597.

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In this thesis, I introduce two types of circularly polarized rectangular microstrip antennas at 2.44 GHz. First type has direct fed and the second has two inputs for fed. In first case is used a stub to make the frequency with minimum return loss and equal to the frequency with minimum axial ratio. In second case is use the power splitter to divide the wave in to two lines with phase shift 90° for feeding the patch. In this thesis is described, how to get the best results of Axial Ratio.

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Sulaiman, Mohamad Ismail. "Design and analysis of singly-fed dielectric resonator antennas with a wideband circular polarization." Thesis, University of Sheffield, 2012. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.578033.

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The proliferation of mobile communications technology increases the demands for faster and more robust services, in addition to the ever decreasing sizes of antennas. These demands can be satisfied using circularly polarized (CP) dielectric resonator antennas (DRAs) exhibiting wide operational bandwidth capability. By utilizing such antennas, the probability of linking the transmitted and received signals is higher, and the system is more reliable since the CP wave is transmitted in all planes and less susceptible to unwanted reflections and absorptions. As CP system is insensitive to the tran

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Darwich, Dia. "Gestion des effets thermiques dans des fibres actives à très grande aire modale pour la montée en puissance des sources laser à 2μm". Thesis, Limoges, 2017. http://www.theses.fr/2017LIMO0085/document.

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Ce travail concerne le développement d’une fibre optique à structure originale permettant la montée en puissance moyenne et crête dans les systèmes lasers à 2μm. La gestion des effets thermiques est devenue aujourd’hui un enjeu primordial notamment pour essayer de repousser le seuil d’apparition des instabilités modales transverses. Le principe mis en avant ici est basé sur la rupture de symétrie de la gaine microstructurée de la fibre afin d’améliorer la délocalisation des modes d’ordre supérieur vers l’extérieur du milieu à gain. Ainsi une propagation quasi-monomode est obtenue dans une fibr

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Bin, Ngah Lufti Arif. "Synchronisation toute optique d’un réseau de communication quantique." Thesis, Nice, 2015. http://www.theses.fr/2015NICE4141/document.

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Ce manuscrit expose le développement de ressources fondamentales pour les communications quantiques à longues distances basées sur les technologies des fibres optiques télécoms et des guides d'onde optiques non linéaires. Après une introduction générale sur les communications quantiques, cette thèse est structurée en trois parties principales. La première partie illustre le développement de deux sources pour la génération de paires de photons intriqués en polarisation et émis à une longueur d'onde télécom via conversion paramétrique spontanée (SPDC) dans des guides d'ondes non linéaires intégr

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Czerwińska, Urszula. "Unsupervised deconvolution of bulk omics profiles : methodology and application to characterize the immune landscape in tumors Determining the optimal number of independent components for reproducible transcriptomic data analysis Application of independent component analysis to tumor transcriptomes reveals specific and reproducible immune-related signals A multiscale signalling network map of innate immune response in cancer reveals signatures of cell heterogeneity and functional polarization." Thesis, Sorbonne Paris Cité, 2018. http://www.theses.fr/2018USPCB075.

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Les tumeurs sont entourées d'un microenvironnement complexe comprenant des cellules tumorales, des fibroblastes et une diversité de cellules immunitaires. Avec le développement actuel des immunothérapies, la compréhension de la composition du microenvironnement tumoral est d'une importance critique pour effectuer un pronostic sur la progression tumorale et sa réponse au traitement. Cependant, nous manquons d'approches quantitatives fiables et validées pour caractériser le microenvironnement tumoral, facilitant ainsi le choix de la meilleure thérapie. Une partie de ce défi consiste à quantifier

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Panascí, Marco. "Vliv dlouhých optovláknových tras na polarizační stav světla a jejich využití pro napájení polarizačních senzorů." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2021. http://www.nusl.cz/ntk/nusl-442367.

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This diploma thesis deals with the influence of long fiber optic paths on the polarization state of light and their use for powering polarization sensors. The aim of the diploma thesis was to design the arrangement of optical fiber components so that the polarization properties of light at the end of the path are further usable for sensory purposes. Four partial measurements with a long path (in a laboratory setting, laying in the ground, on a curtain, under the influence of external influence) and one measurement without a path under the influence of external influence were designed. The over

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Martinod, Marc-Antoine. "Développement et exploitation scientifique d’un nouvel instrument interférométrique visible en optique guidée." Thesis, Université Côte d'Azur (ComUE), 2018. http://www.theses.fr/2018AZUR4215/document.

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L'interférométrie visible longue base est une technique d'observation en astronomie permettant de sonder les objets avec une résolution spatiale qu'il est impossible d'atteindre avec un télescope seul. La mise en œuvre au sol de cette méthode est limitée en sensibilité et précision de mesure à cause de la turbulence atmosphérique. Or les nouveaux besoins scientifiques, tels que la détermination des paramètres fondamentaux, l'étude de l'environnement proche ou de la surface des étoiles, requièrent la capacité d'observer des objets de moins en moins brillants et de faire des mesures de plus en p

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Prade, Bernard. "Quelques aspects theoriques et experimentaux de la propagation des ondes electromagnetiques dans l'atmosphere et dans une fibre optique monomode." Paris 6, 1987. http://www.theses.fr/1987PA066061.

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Cette these, menee dans le cadre d'un travail sur la transmission d'informations par voie optique, comporte deux parties; la premiere traite du bruit de polarisation introduit par l'atmosphere au repos ou en ecoulement; la seconde partie traite du couplage par champ evanescent dans les fibres monomodes

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Kirik, Mustafa Sancay. "Design, Analysis, And Implementation Of Circular Disk - Annular Ring (cdar) Antenna." Master's thesis, METU, 2007. http://etd.lib.metu.edu.tr/upload/12609156/index.pdf.

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In satellite applications, a circularly polarized satellite antenna is desirable with a pattern that results in constant received power while the distance between the transmitter and the receiver is changing. The Circular Disk - Annular Ring (CDAR) antenna satisfies these requirements along with other requirements for the satellite antenna. The CDAR antenna is a combination of a Circular Disk and an Annular Ring patch antennas. In this thesis, a circularly polarized CDAR antenna that is fed from a single point is designed at the center frequency of 8.2 GHz. This antenna is investigated and opt

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Yu-Chia, Chang. "The Single-molecule Fluorescence Polarization Detecting System." 2004. http://www.cetd.com.tw/ec/thesisdetail.aspx?etdun=U0001-2806200417144200.

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LI, ZHENG-LI, and 李政立. "The polarization in single-mode optical fibers." Thesis, 1987. http://ndltd.ncl.edu.tw/handle/11218916274704203445.

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Chang, Yu-Chia, and 張瑜家. "The Single-molecule Fluorescence Polarization Detecting System." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/96600796697395987965.

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碩士<br>國立臺灣大學<br>物理研究所<br>92<br>A single-molecule fluorescence polarization (SMFP) detecting system enables us to investigate the time evolution of the dipole orientation of a chromophore. It has applications for a variety of studies such as determine the protein structure, detecting the rotational motion of a protein, characterizing the properties of a membrane, and so on. Within the framework of this thesis, we have successfully developed a SMFP detecting system by employing a polarization beamsplitter cube into a double-port scanning confocal microscope. The intensity ratio of the two linear

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