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Relevant bibliographies by topics / Electro-optical modulation / Dissertations / Theses

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Dissertations / Theses on the topic 'Electro-optical modulation'

Author: Grafiati

Published: 4 June 2021

Last updated: 4 February 2022

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1

Thorn, Andrew Peter. "Electro-optical modulation in III-V semiconductors." Thesis, Imperial College London, 1990. http://hdl.handle.net/10044/1/46578.

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2

Riedel, Christoph Alexander. "Transparent conductive oxide based hybrid nanostructures for electro-optical modulation." Thesis, University of Southampton, 2018. https://eprints.soton.ac.uk/420940/.

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In the last decades, plasmonic resonant nanoantennas have created interest in a wide range of research fields that deal with light confinement on the nanoscale. One promising new research branch involves electrically switchable optical properties, which are scaled down to sub-μm size using plasmonic structures. In this thesis, samples with antenna structures whose resonances can be electrically modulated were designed, fabricated and characterised both electrically and optically. A comprehensive analytical study on the interaction of carrier modulation and optical antennas showed that shifts o

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3

Chretien, Jacques. "Développement de micro-modulateurs électro-optiques à base de matériaux à coefficients géants." Thesis, Besançon, 2016. http://www.theses.fr/2016BESA2014/document.

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Cette thèse a pour but de développer de nouveaux procédés de fabrication dansle cadre de la réalisation de composants électro-optiques basés sur l’utilisation dematériaux à coefficients géants.A travers le développement de procédés de mises en forme inovants, différentsaspects théoriques et expérimentaux ont été abordés notamment avec la mise enplace d’un procédé de repolarisation dédié au Niobate de Strontium Baryum<br>The objective of this thesis is to develop new manufacturing processes within theframework of the realization of electro-optical components based on specifics materialswith gia

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Allibe, Julie. "Développement et intégration de films minces du multiferroïque BiFeO3 pour la modulation électro-optique et le contrôle électrique d'une aimantation." Thesis, Paris 11, 2011. http://www.theses.fr/2011PA112091.

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5

Jacobsson, Fredrik. "DPSK modulation format for optical communication using FBG demodulator." Thesis, Linköping University, Department of Science and Technology, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-2307.

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<p>The task of the project was to evaluate a differential phase shift keying demodulation technique by replacing a Mach-Zehnder interferometer receiver with an optical filter (Fiber Bragg Grating). Computer simulations were made with single optical transmission, multi channel systems and transmission with combined angle/intensity modulated optical signals. The simulations showed good results at both 10 and 40 Gbit/s. Laboratory experiments were made at 10 Gbit/s to verify the simulation results. It was found that the demodulation technique worked, but not with satisfactory experimental results

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6

Pagano, Carlo [Verfasser], and Christian [Akademischer Betreuer] Boit. "Electro optical frequency modulation on silicon integrated circuits with 1300nm and 1064nm laser sources / Carlo Pagano. Gutachter: Christian Boit." Berlin : Technische Universität Berlin, 2015. http://d-nb.info/1069319317/34.

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7

Nguyen, Giang Thach, and thach nguyen@rmit edu au. "Efficient Resonantly Enhanced Mach-Zehnder Optical Modulator on Lithium Niobate." RMIT University. Electrical and Computer Engineering, 2006. http://adt.lib.rmit.edu.au/adt/public/adt-VIT20070118.162330.

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Photonic links have been proposed to transport radio frequency (RF) signals over optical fiber. External optical modulation is commonly used in high performance RF-photonic links. The practical use of optical fiber to transport RF signals is still limited due to high RF signal loss. In order to reduce the RF signal loss, highly efficient modulators are needed. For many applications, modulators with broad bandwidths are required. However, there are applications that require only a narrow bandwidth. For these narrow-band applications, the modulation efficiency can be improved through the resonan

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8

Gutiérrez, Campo Ana María. "Development of integrated silicon photonics modulation devices for digital and analog applications." Doctoral thesis, Universitat Politècnica de València, 2013. http://hdl.handle.net/10251/33330.

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Silicon photonics is one of the most exciting and fastest growing photonic technologies in recent years. The salient feature of this technology is its compatibility with the mature silicon IC manufacturing based on complementary metal-oxide semiconductor (CMOS) processes widely used in microelectronic industry. Another motivation is the availability of high-quality silicon-on-insulator (SOI) planar waveguide circuits that offer strong optical confinement due to the high index contrast between silicon (n=3.45) and SiO2 (n=1.45). This opens up miniaturization and very large scale int

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9

Giuglea, Alexandru, Guido Belfiore, Mahdi Khafaji, Ronny Henker, Despoina Petousi, Georg Winzer, Lars Zimmermann, and Frank Ellinger. "Comparison of Segmented and Traveling-Wave Electro-Optical Transmitters Based on Silicon Photonics Mach-Zehnder Modulators." Institute of Electrical and Electronics Engineers (IEEE), 2018. https://tud.qucosa.de/id/qucosa%3A35393.

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This paper presents a brief study of the two most commonly used topologies - segmented and traveling-wave - for realizing monolithically integrated electro-optical transmitters consisting of Si-photonics Mach-Zehnder modulators and their electrical drivers. To this end, two new transmitters employing high swing breakdown voltage doubler drivers were designed in the aforementioned topologies and compared with regard to their extinction ratio and DC power consumption at the data rate of 30 Gb/s. It is shown that for the targeted data rate and extinction ratio, a considerably lower power consumpt

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10

Abelard, Clément. "Micro modulateur spatial de lumière transmissif pour modulation de phase et d’amplitude." Thesis, Université Grenoble Alpes (ComUE), 2018. http://www.theses.fr/2018GREAT092/document.

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Le LETI possède un savoir-faire permettant de réaliser des micro modulateurs spatiaux de lumière (Spatial Light Modulators, SLMs) réalisés en technologie microélectronique sur silicium, ayant des très grandes résolutions et de très petits pas de pixels. Le LETI souhaite utiliser une technologie LCD particulière (la technologie IPS) dont d’une part les performances électro-optiques dans le domaine des micro-écrans ne sont pas connues mais d’autre part permet de garder des coûts réduits et de réduire le nombre d’étapes de fabrication. L’objectif de cette thèse est d’évaluer sur la base de simula

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11

Simões, Fábio Donati. "Estudo do impacto do gorjeio (chirp) de transiente sobre o desempenho de sistemas de transmissão óptica com pulsos NRZ." Universidade de São Paulo, 2008. http://www.teses.usp.br/teses/disponiveis/18/18133/tde-04072008-090547/.

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Formatos de modulação com capacidade de ajuste às condições variáveis de propagação são de interesse para uso em redes ópticas reconfiguráveis. Alterações nos níveis de potência e no mapa de dispersão afetam o desempenho de sistemas de transmissão, limitando o alcance e a capacidade de reconfiguração da rede. Fornecer capacidade de ajuste dinâmico ao sinal transmitido, sem usar sistemas complexos de modulação ou de compensação variável de dispersão, é uma solução eficaz para se obter rendimento ótimo nas diversas condições de propagação na rede. Esta característica também é útil na instalação

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12

Roth, Matthias [Verfasser], Klaus [Gutachter] Janschek, and Wolfgang [Gutachter] Osten. "Contributions to the design of Fourier-optical modulation systems based on micro-opto-electro-mechanical tilt-mirror arrays / Matthias Roth ; Gutachter: Klaus Janschek, Wolfgang Osten." Dresden : Technische Universität Dresden, 2020. http://d-nb.info/1227202296/34.

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13

Barbarini, Elisa Signoreto. "Análise óptica de sistemas eletro-ópticos por meio do cálculo da função de transferência de modulação." Universidade de São Paulo, 2012. http://www.teses.usp.br/teses/disponiveis/18/18152/tde-20062012-151937/.

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Um grande número de equipamentos utilizam sistemas ópticos ou eletro-ópticos em suas estruturas, dentre esses equipamentos tem-se os microscópios, telescópios, equipamentos médicos, câmeras de satélites, entre outros. Com isso a necessidade de métodos e ferramentas que auxiliem na determinação do desempenho e da qualidade dos sistemas ópticos é crescente. Um dos métodos mais utilizados para realizar a análise de sistemas ópticos é a determinação da Função de Transferência de Modulação (Modulation Transfer Function - MTF). A MTF representa uma verificação quantitativa e direta da qualidade da

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14

Chaisakul, Papichaya. "Ge/SiGe quantum well devices for light modulation, detection, and emission." Phd thesis, Université Paris Sud - Paris XI, 2012. http://tel.archives-ouvertes.fr/tel-00764154.

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This PhD thesis is devoted to study electro-optic properties of Gemanium/Silicon-Germanium (Ge/SiGe) multiple quantum wells (MQWs) for light modulation, detection, and emission on Si platform. It reports the first development of high speed, low energy Ge/SiGe electro-absorption modulator in a waveguide configuration based on the quantum-confined Stark effect (QCSE), demonstrates the first Ge/SiGe photodiode with high speed performance compatible with 40 Gb/s data transmission, and realizes the first Ge/SiGe light emitting diode based on Ge direct gap transition at room temperature. Extensive D

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15

Neves, Daniel Marchesi de Camargo. "Ressoadores WGM baseados em grafeno como plataforma para moduladores de eletro-absorção." Universidade de São Paulo, 2015. http://www.teses.usp.br/teses/disponiveis/18/18155/tde-07082015-100910/.

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O objetivo deste trabalho é investigar a aplicação ressoadores WGM (Whispering-Gallery Mode) em plataforma SOI (silicon-on-insulator) baseados em grafeno como candidatas potenciais para aplicações como moduladores de eletro-absorção. O grafeno apresenta variação de condutividade considerável quando submetido a uma aplicação de tensão, o que reflete na parte imaginária de seu índice de refração (relacionada às perdas de propagação). Com isso, é possível atribuir estados ligado e desligado (on-off) que conferem ao dispositivo sua característica de modulação óptica. A geometria utilizada é do tip

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16

Leroy, Floriane. "Etude des propriétés électro-optiques des couches minces de Ba1-xSrxTiO3 pour la modulation optique." Phd thesis, Université de Valenciennes et du Hainaut-Cambresis, 2012. http://tel.archives-ouvertes.fr/tel-00749716.

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Le développement de nouveaux matériaux est essentiel dans la réalisation de capteurs de petites dimensions et pour les composants micro-nano-optoélectroniques. Les matériaux à base d'oxydes en sont de bons candidats. Ce travail de thèse a concerné la synthèse de matériaux ferroélectriques tels le BaTiO3 (BTO) et le Ba1-xSrxTiO3 (BST), associés à des électrodes inférieures et supérieures en oxyde d'indium-d'étain (ITO), tous déposés par pulvérisation cathodique RF (radio fréquence). Nous nous sommes concentrés sur la relation existante entre les propriétés optiques et électro-optiques de guide

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17

Trouillet, Alain. "Réalisation de guides optiques plans en polymères non linéaires : application à la modulation électrooptique de plasmons de surface à faibles pertes." Saint-Etienne, 1994. http://www.theses.fr/1994STET4003.

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Ce mémoire présente l'étude des propriétés optiques non linéaires de matériaux polymères et met en évidence l'intérêt d'un plasmon de surface à faibles pertes pour réaliser un modulateur électrooptique en optique intégrée. Après une présentation générale des propriétés optiques non linéaires dans les polymères, nous décrivons la caractérisation de composés nouveaux obtenus par copolymérisation du styrène avec des comonomères non linéaires dérivés du CMS (chlorométhylstyrène) ou bien du HEMA (hydroxyéthylméthacrylate). Des coefficients non linéaires d33 compris entre 1 et 13 pm/v ont été déterm

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18

Gelsen, Olaf Michael. "Electro-modulation spectroscopy of arylene vinylene polymers." Thesis, University of Cambridge, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.283950.

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19

Pascal, Simon. "Conception et étude de chromophores polyméthines pour l'optique non-linéaire dans le proche infrarouge." Thesis, Lyon, École normale supérieure, 2014. http://www.theses.fr/2014ENSL0909.

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L’objectif de cette thèse consistait à développer des colorants de la famille des polyméthines absorbant dans le proche infrarouge et présentant des propriétés d’optique non-linéaire (ONL) prononcées. De nouveaux chromophores ont été préparés et leurs propriétés spectroscopiques ont été systématiquement étudiées afin d’établir des relations structures-propriétés. Cette stratégie a permis l’identification des facteurs permettant d’exalter la réponse ONL des polyméthines et de prédire leur comportement face à de subtiles modifications structurales. Trois familles de colorants ont été préparées :

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20

An, Dechang. "Electro-optic polymer-based monolithic waveguide devices with multi-functions of amplification switching and modulation." Access restricted to users with UT Austin EID Full text (PDF) from UMI/Dissertation Abstracts International, 2001. http://wwwlib.umi.com/cr/utexas/fullcit?p3035933.

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21

Gillespie, William U. "Design and experimental evaluation of an electro-optical, sigma-delta modulator for wideband digital antennas." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2000. http://handle.dtic.mil/100.2/ADA386636.

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Thesis (M.S. in Electrical Engineering) Naval Postgraduate School, Dec. 2000.<br>Thesis advisors, Phillip E. Pace, John P. Powers. Includes bibliographical references (p. 91-92). Alo available online.

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22

Pasquali, González Elisa Co (Elisa Carolina) 1975. "Wideband optical frequency comb generator using a phase velocity-matched lithium tantalate electro-optic modulator." Thesis, Massachusetts Institute of Technology, 1998. http://hdl.handle.net/1721.1/47719.

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Thesis (M.Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1998.<br>Includes bibliographical references (leaves 74-75).<br>A wideband optical frequency comb generator can be built using an electro-optic modulator that is driven at a frequency of several GHz and that is enclosed in an optical cavity. When light is circulated within the optical cavity, multiple passes through the modulator produce a spectrum centered at the carrier frequency with hundreds of sidebands spaced at the modulation frequency, with a comb span limited only by the mater

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23

Chopard, Adrien. "Demonstration of a free-space optical communication link in the 10-meter range using electro-absorption modulator arrays." Thesis, KTH, Tillämpad fysik, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-202613.

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24

Gan, Haiyong. "Electro-optic Polymer Based Fabry-Perot Interferometer Devices for Optoelectronic Applications." Diss., The University of Arizona, 2008. http://hdl.handle.net/10150/195839.

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Fabry-Perot interferometer (FPI) devices are designed based on the electro-optic (EO) activities of nonlinear optical (NLO) polymer materials for tunable optical filters (TOFs) and spatial light modulators (SLMs). The performance of the EO polymer based FPI devices is theoretically modeled with first order approximation on the FPI cavity interface phase dispersion. NLO materials including TCBD coupled hybrid sol-gel, AJL8/amorphous polycarbonate (APC), and AJLS102/APC are incorporated in FPI structures with distributed Bragg reflector mirrors and transparent conducting oxide electrodes for T

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Poggi, Daniele. "Physical modeling of optical modulators for optical link analysis : Optical link analysis in silicon photonics technologies." Thesis, KTH, Skolan för elektroteknik och datavetenskap (EECS), 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-247887.

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According to the 2018 Ethernet Roadmap projections, the requirements for high speed links keep increasing every year, always keeping an eye on the energy per bit consumption of the communication system. The Ethernet requirements are estimated to reach 1Tbps by 2022-2025. Optical links are one of the most concrete solutions to satisfy bandwidth requirements at low energy consumption. An optical link is a communication system that consists of a single end-to-end optical circuit. In contrast with vertical-cavity surface-emitting laser (VCSEL) technology, which is based on a direct laser modulatio

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Wang, Shengjia [Verfasser], Alexander W. [Akademischer Betreuer] Koch, Alexander W. [Gutachter] Koch, and Bloise Felix José [Gutachter] Salazar. "Dual Transverse Electro-Optic Modulator in Optical Interferometric Systems / Shengjia Wang ; Gutachter: Alexander W. Koch, Felix José Salazar Bloise ; Betreuer: Alexander W. Koch." München : Universitätsbibliothek der TU München, 2020. http://d-nb.info/1204200262/34.

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27

Abel, Stefan. "Dispositifs électro-optiques à base de titanate de baryum épitaxié sur silicium pour la photonique intégrée." Thesis, Grenoble, 2014. http://www.theses.fr/2014GRENT004/document.

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En premier lieu, des couches minces épitaxiales ont été obtenues sur des substrats de silicium grâce à l’utilisation de l’épitaxie par jets moléculaire et de couches tampons de titanate de strontium SrTiO3. Une technique de croissance par co-déposition a été développée de manière à obtenir un rapport Ba:Ti proche de la stoechiométrie, et ce afin d’éviter la formation de défauts cristallins dans la couche de BaTiO3. Le matériau déposé cristallise dans une structure de symétrie quadratique, ce qui est unpré-requis pour l’obtention de propriétés électro-optiques. De plus, selon les conditions de

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28

Lu, Xuejun. "High performance thermo-optic switch and electro-optic modulator based on polymeric multi-mode waveguides with high device packing density for optical network applications." Access restricted to users with UT Austin EID Full text (PDF) from UMI/Dissertation Abstracts International, 2001. http://wwwlib.umi.com/cr/utexas/fullcit?p3034934.

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29

Stolz, Arnaud. "Conception, fabrication et caractérisation d'un modulateur optique à commande plasmonique sur nitrure de gallium à une longueur d'onde de 1,55 micron." Phd thesis, Université de Valenciennes et du Hainaut-Cambresis, 2011. http://tel.archives-ouvertes.fr/tel-00677475.

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Les futurs modulateurs optiques doivent satisfaire à des exigences auxquelles les modulateurs électro-optiques actuels ne peuvent plus répondre (tension de commande et dimensionnement faible, fonctionnement dans la gamme 0-40GHz à faibles pertes). Il devient alors nécessaire d'envisager de nouveaux moyens de réaliser une modulation rapide à faible consommation. Ce travail s'inscrit au sein d'un projet amont de la DGA, afin d'évaluer le gain potentiel de la plasmonique sur semiconducteurs pour la modulation optique. Nous avons d'abord sélectionné des couches de GaN sur saphir avec d'excellentes

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Tang, Yongbo. "Study on electroabsorption modulators and grating couplers for optical interconnects." Doctoral thesis, KTH, Mikroelektronik och tillämpad fysik, MAP, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-24178.

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Decades of efforts have pushed the replacement of electrical interconnects by optical links to the interconnects between computers, racks and circuit boards. It may be expected that optical solutions will further be used for inter-chip and intra-chip interconnects with potential benefits in bandwidth, capacity, delay, power consumption and crosstalk. Silicon integration is emerging to be the best candidate nowadays due to not only the dominant status of silicon in microelectronics but also the great advantages brought to the photonic integrated circuits (PICs). Regarding the recent breakthroug

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31

Adams, Mitchell Robert. "Dual-Axis Acousto-Optic/Electro-Optic Deflectors in Lithium Niobate for Full-Parallax Holographic Video Displays." BYU ScholarsArchive, 2021. https://scholarsarchive.byu.edu/etd/9159.

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A major limitation of acousto-optic (AO) leaky-mode modulator based holographic displays is their inability to present full-parallax. We propose that full-parallax capabilities can be bestowed on these displays by integrating an electro-optic (EO) phased array into the architecture. We validated this concept by rendering computational models and by fabricating and testing a basic two-axis AO/EO deflector prototype in lithium niobate. This was, to our knowledge, the first instantiation of an integrated, hybrid AO/EO deflector. The prototype had a 6° deflection range along the AO-axis, and a 3°

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Ngoho, Moungoho Stéphane Samuel. "Contribution à la conception de modules hyperfréquences et optoélectroniques intégrés pour des systèmes optiques à très haut débit." Thesis, Limoges, 2016. http://www.theses.fr/2016LIMO0042.

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L’augmentation des capacités des systèmes de télécommunications optiques passe par le développement des dispositifs optoélectroniques innovants et des technologies clés à hautes performances. Ces dispositifs sont sujets à une forte intégration des composants et les technologies déployées mettent en œuvre des fonctions complexes (PDM – QPSK, PDM – 16 QAM, etc.). Il est donc nécessaire avant toute réalisation d’étudier le comportement électromagnétique de ces composants afin d’envisager des performances en haute fréquence et une bonne intégrité du signal contenant l’information dans la chaîne de

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Mhaouech, Imed. "Étude du transport de charges dans le niobate de lithium massif et réalisation de fonctions électro-optiques dans le niobate de lithium périodiquement polarisé." Thesis, Université de Lorraine, 2017. http://www.theses.fr/2017LORR0032/document.

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Le premier volet de cette thèse est consacré à la modélisation des phénomènes de transport dans le LN. Partant d'une analyse critique des modèles de bande usuels, nous montrons leur inadéquation dans le cas du LN et nous proposons un modèle de saut basé sur la théorie des petits polarons. Nous étudions d'abord par simulation Monte-Carlo la décroissance d'une population de polarons liés NbLi4+ relaxant vers des pièges profonds FeLi3+. Nous montrons que les pièges FeLi3+ ont des rayons effectifs particulièrement grands, rayons qui augmentent encore à température décroissante, et limitent considé

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Sato, Sandra Sayuri. "Simulação multifísica utilizando método dos elementos finitos auxiliando interativamente a fabricação de moduladores eletro-ópticos em substratos de Bi4Ge3O12." Universidade de São Paulo, 2015. http://www.teses.usp.br/teses/disponiveis/3/3143/tde-21072016-091619/.

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Este trabalho apresenta um método desenvolvido pela autora para, através de simulações multifísicas pelo Método dos Elementos Finitos (MEF), servir como ferramenta de apoio ao projeto e fabricação de guias de onda e moduladores eletro-ópticos em óptica integrada, além de possibilitar a análise da performance de moduladores eletro-ópticos. A técnica adotada para a fabricação dos guias de onda ópticos foi a de tensão mecânica. Os parâmetros de geometria (espessura do filme e larguras das trincheiras) e de temperatura de deposição do filme são definidos nas simulações e utilizados no processo de

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Fu, Kuang-Yu, and 傅光宇. "Electro-Optical Modulation of the Liquid Crystal Device." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/92320266974190495014.

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碩士<br>國立彰化師範大學<br>光電工程技術研究所<br>92<br>In this thesis, frequency modulations were demonstrated using a liquid crystal light shutter operated in the electric controlled birefringence mode. When the sinusoidal waves was applied to the LC cell, the output sinusoidal waveforms with double or quadratic frequency of the input signal were generated. Also, the output amplitudes and offsets exhibit periodic oscillations. The applied voltage and the backflow effect contribute to the observed phenomena, and the experimental results were compared and explained qualitatively with the simulation results.

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Hsieh, Chih-Wuei, and 謝志威. "Novel Integrated-Optic Surface-Plasmon-Resonance Biosensor by Electro-Optical Modulation." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/2j99te.

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碩士<br>國立臺北科技大學<br>光電工程系所<br>94<br>In this study, we present a novel integrated-optic surface-plasmon-resonance (SPR) biosensor by electro-optically modulation, which can be used to measure the refractive index of sensing liquid and the concentration of biochemical material. Its device structure consists of a titanium-diffused waveguide, one pair of electrode, and a sensing region. Two kinds of excited layer of surface plasmon, gold film and gold nanoparticle on gold film, are adopted in the sensor, respectively. In order to specifically sense the concentration of biochemical material, human-se

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Li, Tsung-Hsun, and 李宗勳. "Analysis on electro-optical modulation of liquid crystal on a metallic grating structure." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/41295144238068839173.

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碩士<br>國立中山大學<br>光電工程學系研究所<br>104<br>Surface plasmon resonance (SPR) is sensitive to surface structure, metal thickness or refraction index of medium layer. Liquid crystal is anisotropic, and optically, the refraction index of light is related to its direction and polarization. In this research, the birefringent nematic liquid crystal (NLC) with uniaxial crystal structure, E7, was injected to a liquid crystal cell with metallic gratings, and placed on a prism with Kretschmann structure. From the characteristics of electro-optical modulation of liquid crystal, E7 was used to serve as the switc

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Ho, Po-Ching, and 何柏慶. "Localized Surface-Plasmon-Resonance Biosensing System by Electro-Optical Modulation in the ATR Configuration." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/m78v64.

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碩士<br>國立臺北科技大學<br>光電工程系研究所<br>97<br>In this dissertation, we present an electro-optically modulated localized surface plasmon resonance biosensing system in the attenuated-total-reflection configuration, which can be used to measure the concentration of biochemical material. The sensing chip consists of a sensing region and one pair of electrodes on the ridge structure. When the voltage is applied on the electrodes, the electric field produced in lithium niobate electro-optically modulates the refraction index and changes the wave vector of the incidence lightwave. In this study, we use two ki

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Roth, Matthias. "Contributions to the design of Fourier-optical modulation systems based on micro-opto-electro-mechanical tilt-mirror arrays." 2020. https://tud.qucosa.de/id/qucosa%3A72525.

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Spatial Light Modulators (SLMs) based on Micro-Opto-Electro-Mechanical Systems (MOEMS) are increasingly being used in various fields of optics and enable novel functionalities. The technology features frame rates from a few kHz to the MHz range as well as resolutions in the megapixel range. The field continues to make rapid progress, but technological advancements are always associated with high expenditure. Against this background, this dissertation addresses the question: What contribution can optical system design make to the further development of MOEMS-SLM-based modulation? A lens is a si

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Lee, Kun-Yu, and 李堃毓. "Asymmetric Ge/SiGe Quantum Well Applied for Optical Electro Absorption Modulator." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/32721258802910025720.

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碩士<br>國立清華大學<br>光電工程研究所<br>100<br>Optical electroabsorption modulators using quantum confinement Stark effect are important devices in optical commincation. Ge is group IV element that is compatible with Si process. It is possible to integrate Ge/SiGe quantum well devices with integrated circuite. In this thesis, we study the eigen state of carrier and analyze the electroabsorption in an asymmetric quantum well. We find out that if the barrier height of carriers in conduction band and valance band are different, there exists blue shift when electric field is applied. We further suggest a desi

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Lee, Yi-Huan, and 李宜桓. "A Waveguide Electro-Optic Modulator for the Applications of Optical Heterodyne Interferometry." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/51963937677950901197.

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碩士<br>南台科技大學<br>光電工程系<br>98<br>In this thesis, the applications of the homemade Zn-Indiffused electro-optic modulator (ZIEOM) have been evaluated and applied for optical heterodyne interferometry at visible wavelengths (532nm, 632.8nm, and 670nm). The switching voltages and phase stabilities of the proposed waveguide modulator are further compared with the commercial buck-type modulator (EOM). The results show that the ZIEOM has a lower switching voltage and better phase stability than that of the EOM. Moreover, the ZIEOM can be used to modulate the stable heterodyne light sources for various

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Su, Huan-Kuan, and 蘇桓寬. "Fabrication and measurement of asymmetric PN junction silicon microring electro-optical modulator." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/51920429730206810721.

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Chen, Ren-Yu, and 陳人郁. "An investigation of Ta2O5 optical waveguide for electro-optical absorption modulator with a thin InOx absorption layer." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/83yt5n.

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碩士<br>國立中山大學<br>光電工程學系研究所<br>106<br>In the thesis, we fabricated Ta2O5 optical waveguide with a thin InOx layer and investigated the absorption effect of the InOx layer. The Ta2O5 films were prepared using the RF-magnetron sputtering system on silicon substrates with 3-μm thick thermal oxide. The waveguide devices obtained by conventional photolithography to define pattern and dry etching to form the Ta2O5 rib-waveguide. Furthermore, we deposited InOx thin layer upon the Ta2O5 rib to form a thin absorption layer. Finally, the Ta2O5/InOx electro-optical absorption modulator was completed by dep

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Guite, Chinkhanlun. "Experimental Studies Of Electron Spin Dynamics In Semiconductors Using A Novel Radio Frequency Detection Technique." Thesis, 2012. http://etd.iisc.ernet.in/handle/2005/2458.

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A novel experimental setup has been realized to measure weak magnetic moments which can be modulated at radio frequencies (~1–5 MHz). Using an optimized radio-frequency (RF) pickup coil and lock-in amplifier, an experimental sensitivity of 10 -15 Am2 corresponding to 10 -18 emu has been demonstrated with a one second time constant. The detection limit at room temperature is 9.3 10 -16 Am2/√Hz limited by Johnson noise of the coil. In order to demonstrate the sensitivity of this technique it was used to electrically detect the polarized spins in semiconductors in zero applied magnetic fields. F

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Lee, How Chiang, and 李豪強. "Reduction of Nonlinear Distortions and Applications of Optical Bistability with Two-stage Electro-optic Modulator." Thesis, 1996. http://ndltd.ncl.edu.tw/handle/32446854673439840723.

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Lam, Alfred Kan Min. "Wide band electro-optic intensity modulator frequency response measurement using optical heterodyne, Down-conversation Technique." Thesis, 2005. http://hdl.handle.net/2429/16552.

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In this thesis a novel system for measuring the frequency responses of electrooptic intensity modulators in the millimeter-wave regime is described. As the frequency responses of modulators increase, wide band, and cost effective methods to measure these responses need to be developed. The system described in this thesis uses optical heterodyning and a wide band photodiode to generate millimeter-waves to drive the device under test (DUT). The need for a wide band microwave sweeper can therefore be eliminated. Moreover, an inexpensive frequency shifter consisting of a Mach-Zehnder modulator and

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Du, Plessis Jan Harm. "An all-fibre laser distance measurement system utilising figure-eight fibre lasers with electro-optic amplitude modulation." Thesis, 2010. http://hdl.handle.net/10210/3417.

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M.Ing.<br>The aim of this project is to research the feasibility of an all-fibre laser distance measurement device that utilises a figure-eight fibre laser (F8L), in the nonlinear amplifying loop mirror (NALM) configuration, as a light source and implements pulse compression to improve the accuracy and signal-to-noise ratio of the system. A figure-eight fibre laser in the NALM configuration for use in a laser distance measurement device is described. The theory of fibre lasers is discussed, including mode-locking and Qswitching, and the characteristics of a NALM loop are analysed. By varying t

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Shao, Hsiang-Yun, and 邵湘芸. "The Studies for Bidirectional Transmission Systems in ROF-PON Using Electro-Absorption Modulator and Optical Interleaver." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/69779858147934932147.

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碩士<br>明志科技大學<br>電機工程系碩士班<br>102<br>In recent years, technology gradually innovation, breakthroughs, progress, nowadays the Internet has become an internet of life indispensable, these techniques often require high bandwidth capacity in fiber-optic transmission systems. Radio over Fiber-Passive Optical Network (ROF-PON) is a common technology, can supply bandwidth capacity transmission and has low loss, high security and flexibility of the system, provides users with high-quality and diverse wealth of network services. In order to enable the system to diversify, practical, will change the previ

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Chang, Chieh-Po, and 張介柏. "Polychromatic Electro-Optical Pattern Recognition System with Liquid Crystal Spatial Light Modulator Based on Color Human Vision Model." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/42763148924604610483.

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碩士<br>元智大學<br>光電工程研究所<br>96<br>People consider that ATD color model is the most to be close to human eyes. In this thesis, we apply ATD color model to multi-channel nonzero order joint transform correlator and perform pattern recognition. To estimate whether ATD color model is suitable for pattern recognition, we utilize the multi-level quantized reference functions to discuss the effect of pattern recognition. Furthermore, we compare with RGB, which is common used to perform pattern recognition. The terms of estimation contain recognition ability of rotational distortion, brightness performan

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