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Dissertations / Theses on the topic 'Optical bands'

Author: Grafiati

Published: 4 June 2025

Last updated: 1 August 2025

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1

Gelsin, Alexander [Verfasser], and Matthias [Akademischer Betreuer] Bartelmann. "Galaxy Cluster Detection using Optimal Matched Filtering in Optical Bands / Alexander Gelsin ; Betreuer: Matthias Bartelmann." Heidelberg : Universitätsbibliothek Heidelberg, 2015. http://d-nb.info/1180499514/34.

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2

Wirth, Georg [Verfasser]. "Orbital Superfluidity in Excited Bands of an Optical Lattice / Georg Wirth." München : Verlag Dr. Hut, 2013. http://d-nb.info/1042878196/34.

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3

Ölschläger, Christoph [Verfasser]. "Floquet Engineering of Bloch Bands in Shaken Optical Lattices / Christoph Ölschläger." München : Verlag Dr. Hut, 2017. http://d-nb.info/1135595089/34.

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4

TopalovicÌ, Radmila. "Infrared and optical emission bands of the Red Rectangle and other objects." Thesis, University of Nottingham, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.438417.

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5

Meldau, James. "Spectroscopic studies of atomic and molecular species relevant to the optical fibre transmission bands." Thesis, University of Strathclyde, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.249813.

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6

Klafka, Tobias [Verfasser]. "Bose-Einstein condensation in higher Bloch bands of the optical honeycomb lattice / Tobias Klafka." Hamburg : Staats- und Universitätsbibliothek Hamburg Carl von Ossietzky, 2021. http://d-nb.info/1241249202/34.

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7

Fortin, Pascal. "Observations of the Crab Nebula and pulsar in the optical and [gamma]-ray bands with STACEE." Thesis, McGill University, 2005. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=85908.

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The Solar Tower Atmospheric Cherenkov Effect Experiment (STACEE) is an atmospheric Cherenkov telescope that detects cosmic gamma-rays using the wavefront-sampling technique. STACEE uses the large mirror area of the National Solar Thermal Test Facility (NSTTF) to achieve an energy threshold below 200 GeV. This telescope was used to search for high-energy gamma-ray emission from the Crab Nebula and pulsar. A statistical excess of 4.07sigma in the number of on-source events compared to off-source events was detected in 15 hours of on-source observing time, corresponding to an integral flux

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8

Pinheiro, Fernanda. "Multi-species systems in optical lattices : From orbital physics in excited bands to effects of disorder." Doctoral thesis, Stockholms universitet, Fysikum, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-116436.

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In this thesis we explore different aspects of the physics of multi-species atomic systems in optical lattices. In the first part we will study cold gases in the first and second excited bands of optical lattices - the p and d bands. The multi-species character of the physics in excited bands lies in the existence of an additional orbital degree of freedom, which gives rise to qualitative properties that are different from what is known for the systems in the ground band. We will introduce the orbital degree of freedom in the context of optical lattices and we will study the many-body systems

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Duca, Lucia [Verfasser], and Immanuel [Akademischer Betreuer] Bloch. "Probing topological properties of Bloch bands with ultracold atoms in a honeycomb optical lattice / Lucia Duca. Betreuer: Immanuel Bloch." München : Universitätsbibliothek der Ludwig-Maximilians-Universität, 2015. http://d-nb.info/1079140212/34.

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10

Mothe, Emilien. "Spectroscopie de plasma induit par laser appliquée à la détection de résidus d'explosifs." Thesis, Aix-Marseille 2, 2011. http://www.theses.fr/2011AIX22134.

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La menace d’attaques terroristes reste omniprésente dans de nombreux lieux à forte fréquentation. Une technique capable de détecter les substances explosives est donc nécessaire pour traiter au mieux cette menace. Initié par le Ministère de la Défense et la Direction générale de l’Armement, le projet REI ExploLIBS a pour but d’étudier le potentiel de la spectroscopie de plasma induit par laser à détecter les résidus d’explosifs. Des études expérimentales et théoriques sont menées par Bertin Technologies en collaboration avec le laboratoire LP3 – UMR 6182. L’ablation de polymères sous différent

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11

Pässler, Roland. "Alternative Way for Detecting Franck-Condon Shifts from Thermally Broadened Photoneutralization Cross-Section Bands of Deep Traps in Semiconductors." Universitätsbibliothek Chemnitz, 2010. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-201000270.

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12

Meeker, Michael A. "Spin and Carrier Relaxation Dynamics in InAsP Ternary Alloys, the Spin-orbit-split Hole Bands in Ferromagnetic InMnSb and InMnAs, and Reflectrometry Measurements of Valent Doped Barium Titanate." Diss., Virginia Tech, 2016. http://hdl.handle.net/10919/83494.

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This dissertation focuses on projects where optical techniques were employed to characterize novel materials, developing concepts toward next generation of devices. The materials that I studied included InAsP, InMnSb and InMnAs, and BT-BCN. I have employed several advanced time resolved and magneto-optical techniques to explore unexplored properties of these structures. The first class of the materials were the ternary alloys InAsP. The electron g-factor of InAsP can be tuned, even allowing for g=0, making InAsP an ideal candidate for quantum communication devices. Furthermore, InAsP shows

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13

Wood, Michael G. "Active Silicon Photonic Devices Based on Degenerate Band Edge Resonances." The Ohio State University, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=osu1480432902683812.

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14

PENNA, STEFANO. "Design processing and characterization of organic devices for optical communications." Doctoral thesis, Università degli Studi di Roma "Tor Vergata", 2009. http://hdl.handle.net/2108/991.

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La recente esplosione dei servizi a larga banda e i limiti imposti dalla legge di Moore hanno spinto la ricerca verso il concetto di chip ottico integrato, inteso come un dispositivo che implementa le principali funzioni ottiche, tipicamente nella banda C, su di un'unica piattaforma. In questi dispositivi l'integrazione e la compattezza giocano un ruolo fondamentale. Tra i diversi materiali disponibili, i composti semiconduttori organici sono particolarmente attraenti perchè a basso costo di fabbricazione e particolarmente predisposti all'integrazione per via della loro struttura amorfa. Tra

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15

Chan, Yung. "Optical functions of wide band gap semiconductors /." View the Table of Contents & Abstract, 2004. http://sunzi.lib.hku.hk/hkuto/record/B32021264.

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Chan, Yung, and 陳勇. "Optical functions of wide band gap semiconductors." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2004. http://hub.hku.hk/bib/B45015338.

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17

Childress, Michael J. "Narrow frequency-band laser with optical feedback." Thesis, Massachusetts Institute of Technology, 2005. http://hdl.handle.net/1721.1/32841.

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Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Physics, 2005.<br>Includes bibliographical references (p. 24).<br>In this paper we discuss the construction of a narrow frequency-band laser with optical feedback. We use a distributed Bragg reflector (DBR) laser diode centered at the cesium D₂ transition wavelength, [gamma] = 852 nm. The linewidth of this diode is reduced by several orders of magnitude by means of optical feedback from an external cavity. The system is further stabilized by locking the path length between diode and cavity to optimize coupling between them. The abs

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18

Cha, Cheolung. "Broad-band and scalable circuit-level model of MSM PD for co-design with preamplifier in front-end receiver applications." Diss., Available online, Georgia Institute of Technology, 2004:, 2004. http://etd.gatech.edu/theses/available/etd-04122004-115331/unrestricted/cha%5Fcheolung%5F200405%5Fphd.pdf.

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Thesis (Ph. D.)--Electrical and Computer Engineering, Georgia Institute of Technology, 2004.<br>Rhodes, William, Committee Member ; Brooke, Martin, Committee Chair ; Chang, G.K., Committee Member ; Hasler, Paul, Committee Member ; Kohl, Paul, Committee Member. Includes bibliographical references (leaves 133-139).

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Gamble, Robin. "A study of narrow-band spectral reflection filters." Thesis, Queen's University Belfast, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.335958.

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20

Bhuvanendran, Nilesh. "SUB-OPTIMAL ULTRA-WIDE BAND RECEIVERS." Master's thesis, University of Central Florida, 2004. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/4469.

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Ultra-wide Band (UWB) has sparked a lot of interest lately from the industry and academia. The growing capacity of the wireless industry is requires a new communication system that satisfies the high data rate which does not interfere with existing RF systems. UWB promises to be this new technology. UWB also promises low power, low cost and fexibility. The UWB Channel opens up a huge new wireless channel with Giga Hertz Capacities as well as the highest spatial capacities measured in bits per hertz per square meter. When properly implemented UWB channel can share spectrum with traditional radi

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21

Hjørungnes, Are. "Optimal Bit and Power Constrained Filter Banks." Doctoral thesis, Norwegian University of Science and Technology, Faculty of Information Technology, Mathematics and Electrical Engineering, 2000. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-450.

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<p>In this dissertation, two filter banks optimization problems are studied. The first problem is the optimization of filter banks used in a subband coder under a bit constraint. In the second problem, a multiple input multiple output communication system is optimized under a power constraint. Three different cases on the filter lengths are considered: unconstrained length filter banks, transforms, and finite impulse response filter banks with arbitrary given filter lengths. </p><p>In source coding and multiple input multiple output communication systems, transforms and filter banks are used t

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22

Mesquita, Odair dos Santos 1957. "Perspectivas de solução tecno econômico para projetos de rede em banda larga." [s.n.], 2013. http://repositorio.unicamp.br/jspui/handle/REPOSIP/260049.

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Orientador: Yuzo Iano<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Elétrica e de Computação<br>Made available in DSpace on 2018-08-24T09:55:18Z (GMT). No. of bitstreams: 1 Mesquita_OdairdosSantos_M.pdf: 8376051 bytes, checksum: 11a0307915c4b7e7e94393ba4f65c532 (MD5) Previous issue date: 2013<br>Resumo: Nos últimos anos houve uma evolução das redes de telecomunicações no Brasil. A implantação de redes de fibra óptica tornou-se uma realidade dos centros urbanos bem como nas áreas rurais. Com a expansão dessas redes observa-se o surgimento e a necessida

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Carbó, Meseguer Alexis. "Semiconductor optical amplifiers for ultra-wideband optical systems." Electronic Thesis or Diss., Evry, Institut national des télécommunications, 2018. http://www.theses.fr/2018TELE0010.

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Au cours des dernières décennies, le monde a subi une révolution majeure qui a profondément affecté comment on utilise les réseaux de communication. De nouveaux services et applications ont été apparus, tels que les réseaux sociaux, les jeux en ligne ou le streaming en direct, qui exigent une augmentation constante de la capacité des systèmes optiques. La motivation de ce travail est donc d'étudier la mise en œuvre d'un nouvel amplificateur SOA à très large bande avec une bande passante de plus de 100 nm afin d’étendre la capacité du système. L'utilisation de l'amplification SOA change complèt

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24

Louot, Christophe. "Sources de supercontinuum pour la microspectroscopie Raman cohérente large-bande." Thesis, Limoges, 2018. http://www.theses.fr/2018LIMO0015/document.

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La microspectroscopie Raman cohérente (CARS) est une méthode d'analyse optique sans marqueur qui permet d'identifier des liaisons moléculaires dans un milieu d'intérêt (échantillon) pour permettre de déterminer la composition chimique de ce milieu. Elle nécessite l'excitation concomitante de l'échantillon par deux ondes spectralement décalées (onde pompe et onde Stokes) afin de faire entrer en résonance les liaisons à détecter. Pour la détection de plusieurs liaisons simultanément (microspectroscopie Raman cohérente large-bande ou Multiplex-CARS), la source Stokes monochromatique est remplacée

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25

Aközbek, Neset. "Optical solitary waves in a photonic band gap material." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape15/PQDD_0007/NQ35096.pdf.

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26

Priest, Andrew Nicholas. "Inter-band magneto-optical studies of III-V semiconductors." Thesis, University of Oxford, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.299229.

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27

Benhamiche, Amal. "Designing optical multi-band networks : polyhedral analysis and algorithms." Thesis, Paris 9, 2013. http://www.theses.fr/2013PA090075/document.

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Dans cette thèse, on s'intéresse à deux problèmes de conception de réseaux, utilisant la technologie OFDM multi-bandes. Le premier problème concerne la conception d'un réseau mono-couche avec contraintes spécifiques. Nous donnons une formulation en PLNE pour ce problème et étudions le polyèdre associé à sa restriction sur un arc. Nous introduisons deux familles d'inégalités valides définissant des facettes et développons un algorithme de coupes et branchements pour le problème. Nous étudions la variante multicouche du problème précédent et proposons plusieurs PLNE pour le modéliser. Nous ident

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28

Shawley, Charles Richard. "Optical and defect studies of wide band gap materials." Pullman, Wash. : Washington State University, 2008. http://www.dissertations.wsu.edu/Dissertations/Fall2008/c_shawley_012708.pdf.

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Thesis (Ph. D.)--Washington State University, December 2008.<br>Title from PDF title page (viewed on Apr. 13, 2009). "School of Mechanical and Materials Engineering." Includes bibliographical references.

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29

Yamashita, Tsuyoshi. "Unraveling photonic bands : characterization of self-collimation in two-dimensional photonic crystals." Diss., Available online, Georgia Institute of Technology, 2005, 2005. http://etd.gatech.edu/theses/available/etd-06072005-104606/.

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Thesis (Ph. D.)--School of Materials Science and Engineering, Georgia Institute of Technology, 2006.<br>Summers, Christopher, Committee Chair ; Chang, Gee-Kung, Committee Member ; Carter, Brent, Committee Member ; Wang, Zhong Lin, Committee Member ; Meindl, James, Committee Member ; Li, Mo, Committee Member.

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Carbó, Meseguer Alexis. "Semiconductor optical amplifiers for ultra-wideband optical systems." Thesis, Evry, Institut national des télécommunications, 2018. http://www.theses.fr/2018TELE0010/document.

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Au cours des dernières décennies, le monde a subi une révolution majeure qui a profondément affecté comment on utilise les réseaux de communication. De nouveaux services et applications ont été apparus, tels que les réseaux sociaux, les jeux en ligne ou le streaming en direct, qui exigent une augmentation constante de la capacité des systèmes optiques. La motivation de ce travail est donc d'étudier la mise en œuvre d'un nouvel amplificateur SOA à très large bande avec une bande passante de plus de 100 nm afin d’étendre la capacité du système. L'utilisation de l'amplification SOA change complèt

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31

Zacharias, Marios. "Optical properties of semiconductors at finite temperatures from first principles." Thesis, University of Oxford, 2017. https://ora.ox.ac.uk/objects/uuid:4fad686d-c675-44e6-85c7-2725e6598ca5.

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In this thesis we develop a new first-principles method for the calculation of optical absorption spectra and band structures in semiconductors and insulators at finite tem- peratures. The theoretical framework of our methodology originates back to 1950s in two pivotal research papers by F. Williams and M. Lax. Here, we expand the scope of the pioneering works by Williams and Lax, and we present a new theory of phonon- assisted optical absorption and temperature-dependent band structures. We demon- strate that our technique is highly efficient and simple to the point that a single calcu- latio

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Sipahi, Guilherme Matos. "Teoria do Confinamento de Buracos em Heteroestruturas Semicondutoras do Tipo Delta-doping." Universidade de São Paulo, 1997. http://www.teses.usp.br/teses/disponiveis/43/43133/tde-31082012-132038/.

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Poços e super-redes delta-doping tipo são sistemas semicondutores de interesse considerável tanto para a pesquisa básica como para aplicações em dispositivos. Neste trabalho desenvolvemos um novo método para o cálculo de potenciais e estruturas de bandas deste tipo de sistemas. O método baseia-se na expansão em ondas planas da equação da massa efetiva multibandas, usa matrizes de energia cinética de qualquer tamanho e leva em conta o potencial de troca e correlação de uma maneira mais rigorosa do que em trabalhos anteriores. São calculados perfis de potencial e estrutura de minibandas e subban

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Mirshafiei, Mehrdad. "Ultra-wideband Indoor Communications Using Optical Technology." Thesis, Université Laval, 2013. http://www.theses.ulaval.ca/2013/29408/29408.pdf.

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La communication ultra large bande (UWB) a attiré une énorme quantité de recherches ces dernières années, surtout après la présentation du masque spectral de US Federal Communications Commission (FCC). Les impulsions ultra-courtes permettent de très hauts débits de faible puissance tout en éliminant les interférences avec les systèmes existants à bande étroite. La faible puissance, cependant, limite la portée de propaga- tion des radios UWB à quelques mètres pour la transmission sans fil à l’intérieur d’une pièce. En outre, des signaux UWB reçu sont étendus dans le temps en raison de la pro

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34

Delin, Anna. "Density functional calculations of optical spectra and narrow band systems /." Uppsala : Acta Universitatis Upsaliensis, 1998. http://www.gbv.de/dms/goettingen/244104581.pdf.

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35

Rodgers, D. C. "Inter-band optical spectroscopy of III-V semiconductor quantum wells." Thesis, University of Oxford, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.382680.

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36

Molina, Moreno Rocío Gabriela. "Design of optical systems for W-Band astronomical heterodyne cameras." Tesis, Universidad de Chile, 2017. http://repositorio.uchile.cl/handle/2250/145310.

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Magíster en Ciencias de la Ingeniería, Mención Eléctrica. Ingeniera Civil Eléctrica<br>The new generation of telescopes that will be installed in the world and particularly in Chile is focused on the search of high-impact scientific objectives. For this, the technology used must be cutting edge, in order to achieve a better performance than currently achieved. This challenge falls into the hands of engineering and this thesis is developed in that context. The general objective is to develop intermediate optical systems to allow the existence of heterodyne cameras in the range of 85 - 115 GHz

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Favorskiy, Igor. "Optical pumping in Silicon thin films." Phd thesis, Ecole Polytechnique X, 2013. http://pastel.archives-ouvertes.fr/pastel-00950979.

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Grâce à un long temps de vie de spin, le silicium est un matériau prometteur pour l'électronique de spin. Mais les approches classiques d'étude de la dynamique de spin basées sur la luminescence polarisée ne peuvent pas être utilisées dans ce matériau à cause du faible couplage spin-orbite et du gap indirect. Dans ce travail, nous avons étudié la polarisation de spin des électrons de conduction créée en condition de pompage optique par spectroscopie de photoémission. La surface du silicium est activée en affinité négative par dépôt de césium et d'oxygène de sorte que les électrons photoexcités

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Aktuna, Nuri. "Mach bands, Hermann grid, and lateral inhibition in the retina." Thesis, This resource online, 1990. http://scholar.lib.vt.edu/theses/available/etd-11012008-063717/.

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Hokazono, Kenzo. "Eletrorretinograma de padrão reverso (PERG) de campo total na esclerose múltipla e na neuromielite óptica e PERG multifocal na atrofia em banda do nervo óptico: correlação com os achados da tomografia de coerência óptica e da perimetria c." Universidade de São Paulo, 2014. http://www.teses.usp.br/teses/disponiveis/5/5149/tde-09062014-101946/.

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OBJETIVO: avaliar a capacidade do eletrorretinograma de padrão reverso de campo total (PERG) e multifocal (PERGmf) de detectar alterações funcionais da retina em pacientes com afecções desmielinizantes e compressivas da via óptica anterior; estudar a correlação entre as amplitudes do PERG e PERGmf com as espessuras das camadas internas da retina obtidas pela tomografia de coerência óptica (TCO) e com a perda de campo visual avaliada pela perimetria computadorizada padrão (PCP). MÉTODOS: cento e cinquenta e dois olhos de 28 pacientes com esclerose múltipla (EM), 38 com espectro da neuromielite

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Berg, Peter. "Optimal-velocity models of motorway traffic." Thesis, University of Bristol, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.367664.

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Cuenot, Benjamin. "Contribution to engineering of WDM Nx160 Gbit/s optical transmission systems : Analysis of optical signal degradation induced by propagation impairments." Université Louis Pasteur (Strasbourg) (1971-2008), 2004. https://publication-theses.unistra.fr/public/theses_doctorat/2004/CUENOT_Benjamin_2004.pdf.

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Almeida, Bárbara Salomé Ribeiro de. "Advanced passive optical networks and of extended coverage." Master's thesis, Universidade de Aveiro, 2012. http://hdl.handle.net/10773/8701.

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Mestrado em Engenharia Electrónica e Telecomunicações<br>A grande procura por largura de banda acompanhada pelas preocupações económicas tornaram as Redes Ópticas Passivas o foco das operadoras de telecomunicações. A intensificação dos trabalhos nesta área levou à criação de vários standards e intensificou a investigação na área. Ao longo deste trabalho os requisitos definidos na norma EPON e GPON foram analisados bem como algumas das futuras alternativas. Seguiu-se a caracterização dos sistemas EPON e GPON existentes no laboratório. Finalmente um protótipo para um Reach Extender previamente

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Hakl, Michael. "Infrared magneto-spectroscopy of relativistic-like electrons in three-dimensional solids." Thesis, Université Grenoble Alpes (ComUE), 2017. http://www.theses.fr/2017GREAY085/document.

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L'utilisation de l'équation de Dirac/Weyl conduit à une simplification conceptuelle dans une description de la structure de la bande dans les solides à faible échelle d'énergie. En particulier, les excitations d'électrons-trous peuvent être considérées comme analogues au cas relativiste tel que conductivité optique linéaire, le suppression de backscattering ou la manifestation des arcs de Fermi et la chiralité des particules. En outre, la phase semi-métallique est également un élément crucial pour la classification des matériaux. La taille de le gap est affectée qualitativement par le type de

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Doctor, Katarina Zsoldos. "Spectral bands necessary to describe the directional reflective properties of beach sands." Thesis, George Mason University, 2017. http://pqdtopen.proquest.com/#viewpdf?dispub=10192107.

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<p> A common method to identify or model the dominant directional reflective properties of a surface is the bidirectional reflectance distribution function (BRDF). BRDF describes the angular behavior by which light interacts with surfaces. Remote sensing technology has advanced to the stage where hyperspectral sensors, with hundreds of separate wavelength bands, are fairly common. This necessitates examining BRDF in the hyperspectral regime, which implies examining the directional reflective properties of hundreds of narrowly spaced wavelength bands. </p><p> In this dissertation I hypothesiz

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Andrieu, de Levis Jean-Charles. "De la ligne claire à la ligne « pas claire » : émancipations esthétiques de la bande dessinée en France et aux États-Unis à l’orée des années 70." Thesis, Sorbonne université, 2019. http://www.theses.fr/2019SORUL103.

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Déployant une esthétique tournée vers la claire lisibilité des images garantissant leur performativité narrative, la ligne claire s’est naturellement constituée comme un style graphique idéel pour la bande dessinée. Mais en bâtissant un univers orienté vers la neutralisation de l’empreinte plastique de l’auteur, elle restreint singulièrement les ressources expressives de la représentation. À l’orée des années 70, de nombreux auteurs américains et français participent à redéfinir de façon radicale les canons du neuvième art et explorent le potentiel figural de l’image et du récit : l’icône et l

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Schwartz, Brian T. "Ultralow refractive index metamaterials and band gap structures at optical wavelengths." Diss., Connect to online resource, 2005. http://wwwlib.umi.com/cr/colorado/fullcit?p3190383.

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Liudi-Mulyo, Andreas. "Characterisation of quantum dot-intermediate band solar cells with optical spectroscopy." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for fysikk, 2013. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-23616.

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This report describes the development of a photoreflectance (PR) technique in order to study InAs/GaAs quantum dots-based intermediate band solar cells (QD-IBSC). The motivation for this study, is that PR has previously been applied to detect the optical transitions involving the intermediate band as well as the excited states of the quantum dots (QDs). Such excited states are detrimental for the QD-IBSC performance, and they are not readily detected by photoluminescence (PL).The PR signals show several unique peaks for all samples, related to their properties. The Franz-Keldysh oscillations (

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Pretorius, Theunis Wilhelm. "An investigation of dry band arcing on optical fibre / T.W. Pretorius." Thesis, North-West University, 2004. http://hdl.handle.net/10394/318.

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Communication companies are spending millions of Rands on installing optic fibre cables and links, with the purpose of increasing network bandwidth, reliability and stability. Several utilities, that combine power supply and telecommunication over the same servitudes, are confronted with quite a serious problem. The cables are being subjected to extreme electromagnetic (EM) force fields, which cause certain phenomena, damaging the fibres. The fibres that cause problems are usually installed in polluted areas or in salt rich air areas (e.g. along the coast). The purpose of this study is to dete

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Kaufer, Steffen [Verfasser]. "Optical AC coupling in the gravitational wave detection band / Steffen Kaufer." Hannover : Gottfried Wilhelm Leibniz Universität, 2018. http://d-nb.info/1158670540/34.

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Cross, Rachel Elizabeth. "Optical spectroscopy instrumentation for the characterisation of wide band gap materials." Thesis, Aberystwyth University, 2015. http://hdl.handle.net/2160/c30df606-68fb-4add-ad67-dffbcf0965d2.

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This thesis presents work undertaken in the design, build, characterisation and first results of a new instrument for the optical characterisation of wide band gap materials by their luminescence. Optical spectroscopy is a promising method for investigating material properties due to its non-destructive nature and high sensitivity. The ability to relate to a material's optical properties to its structure and composition is highly desirable in Materials Physics applications. Spatial information is lost when measuring heterogeneous samples due to the convolution of spectral information from diff

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