Global ETD Search

41	A presença dos aparelhos e dispositivos ópticos no Rio de Janeiro do século XIX / The presence of the optical aparatus and the optical devices of the 19th century in Rio de Janeiro Silva, Maria Cristina Miranda da 09 May 2006 (has links) Made available in DSpace on 2016-04-26T18:15:36Z (GMT). No. of bitstreams: 1 MARIA CRISTINA MIRANDA DA SILVA.pdf: 4794309 bytes, checksum: 8dfdb518bb29415945268f68c53f3068 (MD5) Previous issue date: 2006-05-09 / Conselho Nacional de Desenvolvimento Científico e Tecnológico / The study investigates the presence of optical apparatus and optical devices in Brazil of century XIX, in special in the city of Rio de Janeiro, objectifying examining its users and diffusers, as well as the forms of comment and social contexts of the use the same ones The research is based on the studies of the early cinema, especially in Tom Gunning and Charles Musser, and in the workmanship of the historian of the art Jonathan Crary, the authors that help us, respectively, in the process of the recontextualizing of the use of optical devices and the dimensionality of the observer of modernity. The empirical work consists of the analysis of the orders of license to the city council of Rio de Janeiro for the exhibition of the devices in the period of 1830 the1890, and in the systematic study of the announcements published in newspapers in that period like Jornal do Commercio from 1850 to 1870. The organization and the categorization of the findings of the research prove that the popularization of the devices mentioned, over all in the street parties. Special emphasis was conferred on the arrival of the photograph in Brazil and the precocity with that the photographer Revert Henrique Klumb developed the Stereoscopy. Thematic that they had been the reference for the Brazilian visuality had been mapped and the Brazilian photographers who had developed this technique had been inventoried. From the announcements published in the Almanak Laemmert, between 1844 and 1889, we have done a survey of the establishments that imported and commercialized the apparatus and devices in the period in question. Taking into account all the information provided, the study questioned the presence of the optical apparatus and devices in the city of Rio de Janeiro in the 19th century, considering the particularities of them in the historical, economical and social context of the time / O estudo investiga a presença dos aparelhos e dispositivos ópticos no Brasil do século XIX, em especial na cidade do Rio de Janeiro, objetivando examinar os seus usuários e difusores, bem como as formas de observação e os contextos sociais de utilização dos mesmos. A pesquisa é fundamentada nos estudos do primeiro cinema, especialmente em Tom Gunning e Charles Musser, e na obra do historiador da arte Jonathan Crary, autores que nos ajudam a analisar, respectivamente, o processo de recontextualização do uso dos dispositivos ópticos e do redimensionamento do observador da modernidade. O trabalho empírico consiste na análise dos pedidos de licença à Câmara Municipal do Rio de Janeiro para a exibição dos dispositivos, no período de 1830 a 1890, e no estudo sistemático de anúncios publicados nos periódicos do período, em especial no Jornal do Commercio, entre as décadas de 1850 e 1870. A organização e categorização dos achados da pesquisa comprovam a popularização dos referidos dispositivos e aparelhos, sobretudo nas festas de rua. Especial ênfase foi conferida a chegada da fotografia no Brasil e a precocidade com que a estereoscopia foi aqui desenvolvida pelo fotógrafo Revert Henrique Klumb. As temáticas que foram referência para a visualidade brasileira foram mapeadas e os fotógrafos brasileiros que desenvolveram esta técnica em seus trabalhos foram inventariados. A partir dos anúncios publicados no Almanak Laemmert, entre os anos de 1844 e 1889, realizamos um levantamento dos estabelecimentos que importavam e comercializavam os aparelhos e dispositivos no período referido. A partir das informações coligidas, a investigação problematiza a presença dos dispositivos e aparelhos ópticos na cidade do Rio de Janeiro no século XIX, considerando as particularidades dos aparelhos e dispositivos no contexto histórico, econômico e social da época Aparelhos ópticos Dispositivos ópticos Estereoscopia Visualidade Cultura visual Cinematografia -- Historia Fotografia estereoscopica Optical apparatus Optical devices Estereoscopy Visuality Visual culture
42	All-Fiber Sensing Techniques For Structural Health Monitoring And Other Applications Madhav, Kalaga Venu 09 1900 (has links) In this thesis, we explore the four aspects of fiber Bragg grating sensors: mathematical modeling of Fiber Bragg Grating response/spectral characteristics, fabrication using phase mask, application and interrogation. Applications of fiber Bragg gratings, also known as in-fiber gratings, with emphasis on their sensing capabilities, interrogation of an array of sensors and their performance in structural health monitoring scenario are documented. First, we study the process of photosensitivity phenomenon in glasses, in particular GeO2:SiO2 glasses. For mathematical modeling we consider the 1-D refractive index profile along the propagation axis of an optical fiber drawn from the preform of such glasses. These 1-D index structures exhibit a bandgap for propagation along the fiber axis. We show how the bandgap is dependent on the two structural parameters: index periodicity and effective refractive index. The mathematical model provides the characteristics of three sensor parameters -resonance wavelength also known as the Bragg wavelength (λB ), filter bandwidth (ΔλB ), and reflectivity (R). We show that the evolution of the index structure in germanosilicate glasses is dependent on the inscription parameters such as exposure time, intensity of the laser used for inscribing, the interference pattern, and coherence of the laser system. In particular, a phase mask is used as the diﬀffacting element to generate the required interference pattern, that is exposed on the photosensitive fiber. We present a mathematical model of the electromagnetic diffraction pattern behind the phase mask and study the effect of the limited coherence of the writing laser on the interference pattern produced by the diffracting beams from the mask. Next, we demostrate the sensing capabilities of the fiber Bragg gratings for measuring strain, temperature and magnetic fields. We report linearity of 99.7% and sensitivity of 10.35pm/◦C for the grating temperature sensor. An array of gratings assigned with non-overlapping spectral windows is inscribed in a single fiber and applied for distributed sensing of structural health monitoring of an aircraft’s composite air-brake panel. The performance of these sensors is compared with the industry standard resistance foil gauges. We report good agreement between the two gauges (FBG and RSG). In some applications it is more desirable to know the spectral content, rather than the magnitude of perturbation. Fiber Bragg gratings sensors can be used to track events that occur in a very small span of time and contain high frequencies. Such applications demand very high speed wavelength demodulation methods. We present two interrogation techniques: wavelength-shift time-stamping (WSTS) and reflectivity division multiplexing (RDM). WSTS interrogation method employs the multiple threshold-crossing technique to quantize the sensor grating fluctuations and in the process produces the time stamps at every level-cross. The time-stamps are assembled and with the a priori knowledge of the threshold levels, the strain signal is reconstructed. The RDM methodology is an extension of the WSTS model to address multiple sensors. We show that by assigning unique reflectivities to each of the sensors in an array, the time-stamps from each of the sensors can be tagged. The time-stamps are collected by virtue of their corresponding pulse heights, and assembled to reconstruct the strain signal of each of the array sensor. We demonstrate that the two interrogation techniques are self-referencing systems, i.e., the speed at which the signals are reconstructed is instantaneous or as fast as the signal itself. Structural Health Monitoring Optical Devices Fiber Optics Fiber Bragg Gratings (FBG) Optical Fibers - Photosensitivity Fiber Bragg Grating Sensor Photonic Bandgap Fabricated Gratings FBG Fabrication Grating Fiber Sensing Reflectivity Division Multiplexing Instrumentation
43	Extensão do método das diferenças finitas para o projeto e modelagem de dispositivos ópticos utilizando meios com propriedades diversas / Finite difference method extension for the design and modeling of optical devices using materials with diverse properties Licinius Dimitri Sá de Alcantara 25 March 2004 (has links) Este trabalho tem por objetivo a extensão de métodos numéricos baseados em diferenças finitas no domínio do tempo (FDTD) e no domínio da freqüência (FD-BPM) para a simulação da propagação de ondas eletromagnéticas em materiais com propriedades ópticas diversas, por exemplo, isotrópicos, anisotrópicos, lineares, não-lineares, bem como a combinação destes em uma mesma estrutura. Inicialmente foram elaborados formalismos bidimensionais (FDTD e FD-BPM), dos quais foram investigados modos com polarização TM (Magnético Transversal) que se propagam em estruturas planares magnetoópticas/não-lineares/lineares. Esta polarização foi escolhida tendo em vista o campo magnetostático dc adotado, o qual possibilitou a observação do fenômeno não-recíproco associado ao não-linear simultaneamente. Por outro lado, é bem sabido que o método FDTD é computacionalmente muito intensivo. Portanto, um grande esforço foi dedicado aos formalismos no domínio da freqüência, os quais foram implementados em duas e três dimensões. Este último foi estendido para um formalismo totalmente vetorial, capaz de simular modos híbridos ou até mesmo a transferência de energia entre modos de polarizações ortogonais. Isto nos permitiu investigar geometrias ainda mais complexas, tais como um isolador óptico baseado em um guia de onda tip rib utilizando material magnetooptico. Adicionalmente, fenômenos de natureza complexa, tais como a dinâmica dos condensados de luz em materiais com não-lineares do tipo Kerr com saturação, também conhecidos como meios não-lineares cúbico-qüínticos, foram investigados pela primeira vez com um formalismo vetorial. Finalmente, métodos numéricos capazes de considerar qualquer combinação de materiais com propriedades ópticas distintas (linear e/ou não-linear e/ou magnetoóptico) são uma ferramenta extraordinária para a comunidade científica para o projeto de novos dispositivos ópticos, bem como a investigação de novos efeitos físicos com vistas à aplicações em computação óptica, que podem resultar em um menor e mais eficiente número de componentes para sistemas de comunicações ópticos. / This work introduces three improved formalisms for the analysis of electromagnetic wave propagation through materials with distinct optical properties, i.e., isotropic, anisotropic, linear, nonlinear, or any combination of them. Two finite difference approaches were extensively investigated in this work for this purpose, namely the finite difference in time domain (FDTD), and the finite difference beam propagation method (2D and 3D FD-BPM), these in frequency domain. Initially, a TM (transverse magnetic) mode propagating through a planar magnetooptic/nonlinear/linear waveguide was investigated by way of a two-dimensional formalism (FDTD and FD-BPM). This mode polarization was chosen based on the orientation of the external magnetostatic field adopted, which favored the observation of non-reciprocal and nonlinear effects simultaneously. On the other hand, it is well known that FDTD formalisms are computationally intensives. Therefore, a great effort was dedicated to its frequency domain counterpart (FD-BPM), which was implemented in two and three dimensions. The later was further extended to a fully vectorial formalism, which is capable of simulating hybrid modes or even the energy transfer between orthogonal modes. This enabled us to investigate more complex geometries, such as an optical isolator based on magnetooptic rib waveguide. Additionally, complex phenomena, such as the dynamic of light condensates in bulk nonlinear Kerr media with saturation, also known as cubic-quintic nonlinear media, were investigated for the first time with a 3D vectorial formalism. Finally, numerical methods capable of handling any combination of materials with distinct optical properties (linear and/or nonlinear and/or magnetooptic) are an extraordinary tool for the scientific community for the design of new optical devices, as well as the investigation of new physical effects aimed for optical computing, that may result in fewer and more efficient components for optical communication systems. Dispositivos ópticos integrados Meios anisotrópicos Meios não-lineares Método FD-BPM Método FDTD Óptica guiada Anisotropic materials FD-BPM method FDTD method Guided optics Integrated optical devices Nonlinear materials
44	Guides d’ondes dans un cristal de niobate de lithium périodiquement polarisé : fabrication et étude par des techniques de microscopie à sonde locale / Creation of optical waveguides with periodical domain structures in lithium niobate single crystals and their study by scanning probe microscopy methods Neradovskiy, Maxim 17 June 2016 (has links) Nous avons étudié l'influence de la fabrication de guides d'ondes optiques par échange protonique doux(SPE) sur les cristaux de niobate de lithium (LN) polarisé périodiquement et nous avons montré que,dans certains cas, ce processus conduit à la création de nanodomaines en surface. Ces nanodomaines enforme d'aiguille peuvent être responsables de la réduction de l'efficacité de conversion non linéaireobservée dans les guides qui sont affectés. Nous avons également étudié l'influence de différents typesd'échange protonique sur la formation, par application d'un champ électrique, de domaines dans le LNcongruent. Cette étude montre que le seuil de nucléation peut être fortement réduit par la présence duguide d'onde et que l'apparition et le développement des domaines en forme de traits est fortementmodifiée. Elle montre également que la fusion des nanodomaines existants au voisinage des parois dedomaine aboutit à la formation de parois élargies et de domaines en forme de dendrites. En irradiantavec un faisceau d'électrons la surface Z- d'un échantillon de LN préalablement soumis à un échangeprotonique doux et recouvert d'une couche de résine électronique, nous avons réussi à former desdomaines avec des formes arbitraires. Par cette technique, nous avons fabriqué des domainespériodiques d'excellente qualité dans des cristaux présentant des guides canaux SPE. Des expériences degénération de deuxième harmonique dans ces guides nous ont permis d'obtenir des efficacités deconversion de 48%/W.cm2 ce qui est conforme aux prédictions ainsi que la forme des spectres d'accordde phase que nous avons observés. Ceci démontre tout l'intérêt de ce processus / The investigation of influence of the soft proton exchange (SPE) optical waveguide (WG) creation onperiodically poled lithium niobate (PPLN) has been done. It has been shown that the WG fabricationprocess can induce the formation of needle like nanodomains, which can be responsible for thedegradation of the nonlinear response of the WG created in PPLN crystals. The domain structure (DS)evolution has been studied in congruent lithium niobate (LN) crystals with surface layers modified bythree different proton exchange techniques. The significant decrease of the nucleation threshold fieldand qualitative change of domain rays nucleation and growth have been revealed. The formation of abroad domain boundary and dendrite domain structure as a result of nanodomains merging in front ofthe moving rays has been demonstrated. The formation of DS in LN with SPE by irradiation of coveredby electron resist polar surface of LN has been investigated. Formation of domains with arbitrary shapesas a result of discrete switching has been revealed. Finally, it has been demonstrated that electron beamirradiation of lithium niobate crystals with surface resist layer can produce high quality periodical domainpatterns after channel waveguide fabrication. Nonlinear characterizations show that the conversionefficiencies and the phase matching spectra conform to theoretical predictions, indicating that thiscombination presents a great interest for device fabrication. Second harmonic generation withnormalized nonlinear conversion efficiency up to 48%/(W cm2) has been achieved in such waveguides Optique intégrée Optique non linéaire Composants optiques Guides d'ondes optiques Microscopie à force piézoélectrique Microscopie Raman Confocale Design assisté par canon à électrons Integrated optics Nonlinear optics Optical devices Optical waveguides Lithium niobate Piezoresponse force microscopy Confocal Raman microscopy Electron beam pattering
45	Hybrid Silicon and Lithium Niobate Integrated Photonics Chen, Li 19 May 2015 (has links) No description available. Optics Electrical Engineering Nanotechnology Electromagnetics silicon photonics integrated optics devices electro-optical devices sensors waveguides resonators optical modulators optical interconnects microwave photonics hybrid photonics integrated optics materials lithium niobate micro-fabrication
46	Análise de sistemas CDMA ópticos / Analysis of optical CDMA systems Santos Filho, Rivail Vilas Boas dos 01 September 2006 (has links) A evolução das redes ópticas para atender o crescimento da demanda por largura de banda tem estimulado a busca por uma maior eficiência na utilização da largura de faixa disponível. O sucesso da implementação prática da técnica de acesso múltiplo por divisão de código (CDMA) em sistemas de comunicações móveis também despertou o interesse por aplicações em redes ópticas (OCDMA). Atributos únicos tais como capacidade flexível sob demanda, segurança na comunicação e alta escalabilidade, incentivaram significativamente as pesquisas. Neste contexto, este trabalho apresenta, primeiramente, uma revisão de várias configurações OCDMA propostas na literatura para qualificar e quantificar códigos válidos, com ênfase nas propriedades de correlação. Em seguida, realiza uma modelagem de sistema óptico abrangendo os subsistemas principais de geração, transmissão e recepção de sinal. O impacto das degradações, referentes à fibra óptica e aos diversos dispositivos que constituem o sistema, é então avaliado e sua influência sobre o desempenho de algumas configurações de codificação é investigado. O conhecimento da forma e das condições de manifestação destas degradações poderá servir de base ao processamento de sinal óptico à luz dos esquemas de codificação. Uma discussão sobre qualidade de serviço (QoS) e sobre flexibilização da aplicação OCDMA em sistemas de comunicação óptica também são também abordadas. / The evolution of optical networks verified in the last few years has been characterized by the search for better bandwidth utilization efficiency. The successful implementation of practical code division for multiple access techniques (CDMA) in mobile communications systems has stimulated new investigations on this topic, particularly in the optical domain (optical CDMA). This is justified due to some remarkable attributes of this technology, such flexibility in code design, capacity on demand, safety, and high scalability. In this context, this dissertation presents, initially, a comprehensive review of several code configurations for OCDMA proposed in the literature, with emphasis particularly on the correlation and users availability properties. Next, it describes the modeling of an optical system consisting of the following three subsystems: generation, transmission, and signal detection. The penalties imposed to the optical codes by the propagating medium, as well as by the devices employed in the system, are accounted for and their influence on the performance of some coding configurations is investigated. The knowledge of how and when these penalties will affect the system is crucial in optical signal processing based on codification schemes. Finally, this work also addresses some aspects related to quality of service (QoS) and flexibility of the OCDMA technology in optical communications systems. code in optical domain códigos ópticos dispositivos ópticos impairments in fiber optic and devices optical communication systems optical devices sistema de comunicações ópticas
47	Análise de sistemas CDMA ópticos / Analysis of optical CDMA systems Rivail Vilas Boas dos Santos Filho 01 September 2006 (has links) A evolução das redes ópticas para atender o crescimento da demanda por largura de banda tem estimulado a busca por uma maior eficiência na utilização da largura de faixa disponível. O sucesso da implementação prática da técnica de acesso múltiplo por divisão de código (CDMA) em sistemas de comunicações móveis também despertou o interesse por aplicações em redes ópticas (OCDMA). Atributos únicos tais como capacidade flexível sob demanda, segurança na comunicação e alta escalabilidade, incentivaram significativamente as pesquisas. Neste contexto, este trabalho apresenta, primeiramente, uma revisão de várias configurações OCDMA propostas na literatura para qualificar e quantificar códigos válidos, com ênfase nas propriedades de correlação. Em seguida, realiza uma modelagem de sistema óptico abrangendo os subsistemas principais de geração, transmissão e recepção de sinal. O impacto das degradações, referentes à fibra óptica e aos diversos dispositivos que constituem o sistema, é então avaliado e sua influência sobre o desempenho de algumas configurações de codificação é investigado. O conhecimento da forma e das condições de manifestação destas degradações poderá servir de base ao processamento de sinal óptico à luz dos esquemas de codificação. Uma discussão sobre qualidade de serviço (QoS) e sobre flexibilização da aplicação OCDMA em sistemas de comunicação óptica também são também abordadas. / The evolution of optical networks verified in the last few years has been characterized by the search for better bandwidth utilization efficiency. The successful implementation of practical code division for multiple access techniques (CDMA) in mobile communications systems has stimulated new investigations on this topic, particularly in the optical domain (optical CDMA). This is justified due to some remarkable attributes of this technology, such flexibility in code design, capacity on demand, safety, and high scalability. In this context, this dissertation presents, initially, a comprehensive review of several code configurations for OCDMA proposed in the literature, with emphasis particularly on the correlation and users availability properties. Next, it describes the modeling of an optical system consisting of the following three subsystems: generation, transmission, and signal detection. The penalties imposed to the optical codes by the propagating medium, as well as by the devices employed in the system, are accounted for and their influence on the performance of some coding configurations is investigated. The knowledge of how and when these penalties will affect the system is crucial in optical signal processing based on codification schemes. Finally, this work also addresses some aspects related to quality of service (QoS) and flexibility of the OCDMA technology in optical communications systems. códigos ópticos dispositivos ópticos sistema de comunicações ópticas code in optical domain impairments in fiber optic and devices optical communication systems optical devices
48	Design of microlaser in medium infrarer wavelengnth range for biomedicine and environmental monitoring / Design de microlaser moyen infrarouge pour la biomédecine et la surveillance environnementale Palma, Giuseppe 20 April 2017 (has links) Les micro-résonateurs optiques comptent parmi les dispositifs les plus importants en photonique. Les résonateurs WGM sont assez particuliers. Il s'agit de composant présentant une symétrie circulaire comme c'est le cas des sphères, des anneaux, des disques et des tores. Les résonateurs WGM présentent un facteur de qualité exceptionnel et un volume modal très faible. Ces appareils peuvent être utilisés dans plusieurs domaines, notamment la télédétection, le filtrage optique et l'optique non linéaire. D'autres applications sont possibles en biologie, médecine, spectroscopie moléculaire, surveillance environnementale, astronomie et astrophysique grâce à l'exploitation du rayonnement moyen infrarouge. Les micro-résonateurs optiques comportent un grand nombre de transitions vibrationnelles qui agissent comme des «empreintes» pour de nombreuses molécules organiques permettant le développement d'applications spectroscopiques innovantes et de nouveaux capteurs. Il convient de noter que l'atmosphère de la terre est transparente au niveau des deux fenêtres de transmission atmosphérique. La première est comprise entre 3 et 5 μm et la seconde entre 8 et 13 μm, ce qui rend possible des applications telles que la détection d'explosifs à distance ainsi que le brouillage de communication confidentielles. La large fenêtre de transparence en verres de chalcogénures dans le domaine spectral infrarouge rend envisageable le développement de nombreuses applications. Les verres de chalcogénure sont caractérisés par une bonne résistance mécanique et une durabilité chimique suffisante dans l'eau et l'atmosphère. Par ailleurs, l'indice de réfraction élevé, le rendement quantique élevé, l'énergie de phonon faible et la solubilité importante des terres rares permettent des émissions dans le domaine spectral du moyen IR. Dans cette thèse, la conception de dispositifs innovants en chalcogénure pour des applications utilisant le moyen infrarouge est étudiée en utilisant un code d'ordinateur personnel formé de façon aléatoire. Les appareils reposent sur des trois types de micro-résonateurs : les microsphères, les micro-disques et les microbulles. Les résonateurs WGM sont efficacement excités à l'aide de fibres nervurées et de guides d'ondes optiques de forme conique. Le nouveau procédé de conception est développé en utilisant la méthode d'optimisation par essaims particulaires (PSO). Elle permet de maximiser le gain d'un amplificateur reposant sur une microsphère d'émission laser dopée à l'erbium à 4,5 μm. Une technique innovante permettant de caractériser les propriétés spectroscopiques de la terre rare intégrant la recherche électromagnétique en mode WGM grâce à l'algorithme PSO a été développée. Les valeurs récupérées sont entachées d’une erreur inférieure à celle prévue par les instruments de mesure ayant un coût élevé. Des applications intéressantes peuvent être obtenues en excitant le micro-résonateur avec une fibre conique présentant deux LPG identiques sur les côtés. En effet, les FLP peuvent sélectionner le couplage de modes de fibre avec le résonateur WGM. En utilisant différentes paires de FLP identiques, opérant dans différentes bandes de longueurs d'onde, il est possible de coupler de façon sélective différents résonateurs à l'aide de la même fibre optique. Un code informatique aléatoire a été développé et validé. Il a démontré la faisabilité d'un capteur de microbulles de glucose. Un microdisque en terre rare dopé est étudié pour obtenir une source de lumière compacte et économique dans l'infrarouge moyen. Un code informatique est développé afin de simuler un micro-disque de terre rare dopé et associé à deux guides d'ondes nervurés, un pour le signal et l'autre pour la pompe. Le modèle est validé à l'aide d'un micro-disque dopée à l'erbium émettant à 4,5 μm. Ce dispositif très prometteur pour des applications dans le moyen infrarouge est obtenu en utilisant un micro-disque de praséodyme dopé émettant à 4,7 μm. / Optical micro-resonators represent one of the most important devices in photonics. A special kind is constituted by the WGM resonators, i.e. devices with circular symmetry such as spheres, rings, disks and toroids. They are characterized by very small dimensions, exceptionally quality factor and very low modal volume becoming a valuable alternative to the traditional optical micro-resonators, such as Fabry-Pérot cavities. These devices allow applications in several fields, such as sensing, optical filtering and nonlinear optics. In particular, different applications in biology and medicine, molecular spectroscopy, environmental monitoring, astronomy and astrophysics are feasible in Mid-Infrared wavelength range. For example, it includes a lot of strong vibrational transitions that act as “fingerprints” of many bio-molecules and organic species allowing the develop of innovative spectroscopic applications and novel sensors. In addition, the earth's atmosphere is transparent in two atmospheric transmission windows at 3–5 μm and 8–13 μm and then applications such as remote explosive detection, e.g. in airports and for border control, and covert communication systems are feasible. The wide transparency window of chalcogenide glasses in Mid-Infrared makes possible the development of several devices. Chalcogenide glasses are characterized by good mechanical strength and chemically durability in water and atmosphere. Furthermore, the high refractive index, high quantum efficiency, the low phonon energy and high rare-earth solubility enables the emissions at long wavelengths.In this thesis, the design of innovative chalcogenide devices for applications in Mid-Infrared is investigated using an ad-hoc home-made computer code. The devices are based on three kinds of micro-resonators: microspheres, micro-disks and microbubbles. The WGM resonators are efficiently excited by using tapered fiber and ridge waveguides. A novel design procedure is developed using the particle swarm optimization approach (PSO). It allows to maximize the gain of an amplifier based on an erbium-doped microsphere lasing at 2.7 μm.An innovative technique in order to characterize the spectroscopic properties of rare-earth is developed integrating the WGM electromagnetic investigation with PSO algorithm. The method is based on two subsequent steps: in the first one, the geometrical parameters are recovered, in the second one, the spectroscopic parameters. The recovered values are affected by an error less than that provided by high-cost measurement instruments. Furthermore, the procedure is very versatile and could be applied to develop innovative sensing systems.Interesting applications could be obtained exciting the micro-resonator by a tapered fiber with two identical LPGs on the sides. Indeed the LPGs can select the fiber modes coupling with the WGM resonator. Using different pairs of identical LPGs operating in different wavelength bands, it is possible to selective couple different micro-resonators by using the same optical fiber. An ad-hoc computer code is developed and validated and it demonstrated the feasibility of a microbubble glucose sensor.In order to obtain a compact and cost-saving light source in Mid-Infrared, rare-earth doped micro-disk are investigated. A computer code is developed in order to simulate a rare-earth doped micro-disk coupled to two ridge waveguide, one at signal wavelength and the other one at pump wavelength. The model is validated using an erbium-doped micro-disk emitting at 4.5 μm. A very promising device for application in Mid-Infrared is obtained using a praseodymium-doped micro-disk emitting at 4.7 μm. Fibre optique Microcavités optique Amplificateur optique Laser Infrarouge Capteurs Terre rare Optimisation globale Verres de chalcogénure Praséodyme Erbium Glass waveguides Laser resonators Microcavities Micro-Optical devices Optical amplifiers Optical resonators Rare-Earth-Doped materials Fiber Optics Infrared Sensors Erbium Praseodymium Optical Spectroscopy Global Optimization
49	Johann Friedrich von Uffenbach. Sammler – Stifter – Wissenschaftler / Johann Friedrich von Uffenbach. Collector - Donor - Scientist Meyerhöfer, Dietrich 28 January 2020 (has links) No description available. 700 Sammeln Uffenbach Frankfurt am Main Wissenschaftliche Gesellschaft Zeichnung Optische Geräte Instrumente zur Gnomonik Astronomische Instrumente 18. Jahrhundert Druckgraphik Sammlungsgeschichte Privatgelehrter Kavaliersreise Bildungsreise Tagebücher Reisetagebücher Auktionswesen Auktionen Auktion Florsheim Geschichte des Sammelns Inventare von Druckgraphik Auktionskatalog Auktionskataloge Gegenschreiberbuch Monogrammistenlexikon Künstlermonogramme Stiftung Göttingen Georg-August-Universität Göttingen Kupferstich Holzschnitt Radierung Sammler Kunstmarkt im 18. Jahrhundert Grand Tour Frankfurter Patrizier Malerakademie Akademie der Wissenschaften Alte Mainbrücke Architekt Architektur Astronomie Bibliothek Bibliotheken Bibliothekswesen Buchhandel Buchhändler Diarien Diarium Direktdruck Drechseln Drechsler Drehbank Druckzustand Enkaustik Fehldruck Fernrohr Fernrohre Festungsbau Feuerwerk Feuerwerkerei Findbuch Findbücher Firnis Firniß Fontäne Fortifikation Geografie Geographie Geometrie Goethehaus Hobelbank Kartographie Klebeband Korrespondenz Kunsthandel Kunsthändler Kunstsammlung Landkarte Landkarten Ludwig XIV. Materialist Mikroskop Mikroskope Mineralienkabinett Naturdruck Oper Optik Prinzmetall Protokoll Pumpenanlage Reisebericht Sammelmappe Schildpatt Sonnenuhr Sonnenuhren Teleskop Teleskope Topographie Vakuumpumpe Vergantung Wassermaschine Wasserspiele Repertorium Protokollband Protokollbände Protokolle Georgia-Augusta Atzenheim Friedrich Philipp von Behaghel Philipp Jacob Benson William Bérain Jean Bernstorff Johann Hartwig Ernst Graf von Bignon Jean–Paul Böhm Johann Christian Breitkopf Bernhard Christoph Buttieri Carlo Antonio Campani Giuseppe Chiarelli Antonio Christ Johann Friedrich Heumann Christoph August Culpeper Edward d’Osangis Jean Pigeon Daimant Le Maire Pierre Dathan Johann Georg Dietzsch Johann Israel Diesterweg Albert Adolf Eberhard Conrad Hieronymus, gen. Schwind Egell Paul Ettling Johann Friedrich Fasch Johann Friedrich Fer Nicolas de Geysel Johann Daniel Goethe Johann Caspar Gottsched Johann Christoph Graupner Christoph Grünewald Gottfried Häckel Heinrich Jakob von Leth Hendrick de Heß Peter Heyne Christian Gottlob Hotteterre Jacques-Martin Hugo Friedrich Ludolph von Marshall John Kaller Johann Christian Kinet Johann Melchior Kniphof Johann Hieronymus Kißner Johann Georg Largillière Nicolas Leth Andries de Mariette Pierre Jean Marolles Michel de Mascow Gottfried Metz Conrad Michu Benoit Moritz Johann Friedrich Münchhausen Gerlach Adolf von Muth Heinrich Ludwig Musschenbroeck Pieter van Pütter Johann Stephan Richter Georg Gottlob Rigaud Hyacinthe Schelhorn Johann Georg Schürmann Georg Caspar Schütz d.Ä. Christian Georg Scotin Gerard Senckenberg Heinrich Christian von Stanislaus I. Leszynski Telemann Georg Philipp Ucheln Heinrich von Uffenbach Johann Friedrich von Uffenbach Wilhelm von Uffenbach Zacharias Conrad von Visscher Nicolaes Wagner Joseph Wolf Johann Christoph Zeller Franz Frauenstein Patriziergesellschaft Collecting Uffenbach Frankfurt am Main Scientific society Drawing optical devices gnomonic instruments Astronomical instruments 18. century Prints history of collection private scholar grand tour diary travel diaries Auctioning Auctions auction Florsheim History of collecting Print graphic inventories Auction catalog Auction catalogs Counter-writing book Monogrammist encyclopedia Artist monograms donation Goettingen Georg-August-University of Goettingen engraving woodcut etching collector Art market in the 18th century Frankfurt patrician Academy of painters Academy of Science Old Main Bridge architect architecture astronomy Library Libraries Librarianship Book trade Bookseller Diaries Diarium Direct printing Turning Turner Lathe Print condition Encaustic Misprint Telescope Telescopes Fortress construction Fireworks pyrotechnics repertory repertories varnish fountain fortification geography geometry Goethe House carpenter’s bench cartography Correspondence Art trade Art dealer Art collection map maps Louis XIV microscope microscopes Mineral cabinet Natural print Opera Optics minutes Pump system Account of a journey file Tortoiseshell sundial sundials topography Vacuum pump waterworks Atzenheim Friedrich Philipp von Behaghel Philipp Jacob Benson William Bérain Jean Bernstorff Johann Hartwig Ernst Graf von Bignon Jean–Paul Böhm Johann Christian Breitkopf Bernhard Christoph Buttieri Carlo Antonio Campani Giuseppe Chiarelli Antonio Christ Johann Friedrich Heumann Christoph August Culpeper Edward d’Osangis Jean Pigeon Daimant Le Maire Pierre Dathan Johann Georg Diesterweg Albert Adolf Dietzsch Johann Israel Eberhard Conrad Hieronymus, gen. Schwind Egell Paul Ettling Johann Friedrich Fasch Johann Friedrich Fer Nicolas de Geysel Johann Daniel Goethe Johann Caspar Gottsched Johann Christoph Graupner Christoph Grünewald Gottfried Häckel Heinrich Jakob von Leth Hendrick de Heß Peter Heyne Christian Gottlob Hotteterre Jacques-Martin Hugo Friedrich Ludolph von Marshall John Kaller Johann Christian Kinet Johann Melchior Kißner Johann Georg Kniphof Johann Hieronymus Largillière Nicolas Leth Andries de Mariette Pierre Jean Marolles Michel de Mascow Gottfried Metz Conrad Michu Benoit Moritz Johann Friedrich Münchhausen Gerlach Adolf von Muth Heinrich Ludwig Musschenbroeck Pieter van Pütter Johann Stephan Richter Georg Gottlob Rigaud Hyacinthe Schelhorn Johann Georg Schürmann Georg Caspar Schütz d.Ä. Christian Georg Scotin Gerard Senckenberg Heinrich Christian von Stanislaus I. Leszynski Telemann Georg Philipp Ucheln Heinrich von Uffenbach Johann Friedrich von Uffenbach Wilhelm von Uffenbach Zacharias Conrad von Visscher Nicolaes Wagner Joseph Wolf Johann Christoph Zeller Franz Georgia-Augusta Frauenstein Kunst (PPN613163508)

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