Dissertations / Theses on the topic 'Michelson interferometer'
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Shiefman, Joseph 1947. "An achromatic Michelson stellar interferometer." Diss., The University of Arizona, 1997. http://hdl.handle.net/10150/288742.
Full textKafle, Rudra Prasad. "Theoretical Study of Bose-Einstein Condensate-Based Atom Michelson Interferometers." Digital WPI, 2012. https://digitalcommons.wpi.edu/etd-dissertations/184.
Full textOliveira, Jillian M. "MICA optical : a low-cost, educational Michelson interferometer." Thesis, Massachusetts Institute of Technology, 2013. http://hdl.handle.net/1721.1/83733.
Full textCataloged from PDF version of thesis.
Includes bibliographical references (pages 45-46).
Current initiatives that provide widespread access to online educational tools, such as edX and Coursera, are transforming education. The MICA (Measurement, Instrumentation, Control, and Analysis) Project, developed by MIT's BioInstrumentation Lab, is a similar initiative that aims to provide students with affordable, modular, and practical experimental tools. This thesis outlines the development of a MICA optical project, the Michelson interferometer. In this classic experiment, by correctly assembling and aligning the optical components, two different interference patterns can be obtained and observed. Other potential experiments include the measurement of light wavelengths, coherence length, as well as thermal expansion coefficients with the addition of a few simple parts. The initial benchmarking, the design process, and the final manufacturing methods for this module are discussed. The result of this project is a modular kit that can accompany a student's online course materials for about the cost of a textbook.
by Jillian M. Oliveira.
S.B.
Risley, Allan David. "Developmental testing of a prototype all-reflection Michelson interferometer." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1993. http://handle.dtic.mil/100.2/ADA269064.
Full textMulye, Apoorva. "Power Spectrum Density Estimation Methods for Michelson Interferometer Wavemeters." Thesis, Université d'Ottawa / University of Ottawa, 2016. http://hdl.handle.net/10393/35500.
Full textKaufer, Henning [Verfasser]. "Opto-mechanics in a Michelson-Sagnac interferometer / Henning Kaufer." Hannover : Technische Informationsbibliothek und Universitätsbibliothek Hannover (TIB), 2014. http://d-nb.info/1051038162/34.
Full textSaha, Partha. "Noise analysis of a suspended high power Michelson interferometer." Thesis, Massachusetts Institute of Technology, 1997. http://hdl.handle.net/1721.1/10256.
Full textVémola, Tomáš. "Soustava Fabry-Perotova a Michelsonova interferometru pro měření délek s femtosekundovým laserem." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2011. http://www.nusl.cz/ntk/nusl-229934.
Full textMirando, Dinesh Amal. "Millimeter – Wave/Terahertz Chirped Michelson Interferometer Techniques for Sub Surface Sensing." Wright State University / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=wright1484698597373738.
Full textKalamatianos, Dimitrios. "Control and signal processing for a new FT-NIR Michelson interferometer." Thesis, University of Manchester, 2005. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.528522.
Full textStancil, Maurice Marcus. "Creation and Experimental Validation of a Numerical Model of a Michelson Interferometer." Thesis, Virginia Tech, 2017. http://hdl.handle.net/10919/74957.
Full textMaster of Science
Pedrazzani, Janet Renee. "High-Temperature Displacement Sensor Using a White-Light Scanning Fiber Michelson Interferometer." Thesis, Virginia Tech, 1996. http://hdl.handle.net/10919/30795.
Full textThe primary development of a white-light Michelson interferometer that utilizes a sapphire fiber sensing head is presented in this thesis. Development includes efforts to combat the poor optical quality of the sapphire fiber, minimize polarization mode fading, and preferentially excite the fundamental mode of the sapphire fiber. This thesis demonstrates the feasibility of fabricating a Michelson white-light interferometer capable of measuring displacements in environments ranging from room temperature to 800 degrees Celsius. The sensor developed in this work is capable of measuring displacements exceeding 6.4 millimeters at room temperature, and exceeding 1 millimeter at 800 degrees Celsius.
This thesis also presents the application of this sensor to the alignment of a sapphire-fiber based Fabry-Perot sensor. This technique allows the Fabry-Perot sensor to be aligned so that usable fringes are always obtained. Alignment of the sapphire-fiber based Fabry-Perot sensors has been considered prohibitively difficult.
Master of Science
Diot, Quentin. "Study of coherence properties of Bose-Einstein condensate in an wave-guide Michelson interferometer." Connect to online resource, 2008. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:3337086.
Full textDelker, Thomas. "Demonstration of a prototype dual-recycled cavity-enhanced Michelson interferometer for gravitational wave detection." [Gainesville, Fla.] : University of Florida, 2001. http://etd.fcla.edu/etd/uf/2001/ank7103/DelkerThesis.v5.pdf.
Full textTitle from first page of PDF file. Document formatted into pages; contains x, 163 p.; also contains graphics. Vita. Includes bibliographical references (p. 160-162).
Maňka, Tadeáš. "Konstrukce odměřovacího systému pro systém reaktivního iontového leptání." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2016. http://www.nusl.cz/ntk/nusl-254215.
Full textCarlson, Scott M. "Validation of the design of a high resolution all-reflection Michelson interferometer for atmospheric spectroscopy." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1993. http://handle.dtic.mil/100.2/ADA272505.
Full textHicks, Jeffrey D. "Design, development and testing of the All-Reflection Michelson Interferometer (AMI) for use in the mid-ultraviolet region." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1995. http://handle.dtic.mil/100.2/ADA305949.
Full text"December 1995." Thesis advisor(s): David D. Cleary, Oscar Biblarz. Bibliography: p. 77-78. Also available online.
Beukers, James. "Characterization of an E2V Charge-Coupled Device for the Michelson Interferometer for Global High-Resolution Thermospheric Imaging Instrument." DigitalCommons@USU, 2015. https://digitalcommons.usu.edu/etd/4448.
Full textGartland, Peter Lanier. "Fiber-Optic Michelson Interferometer with Faraday Mirrors for Acoustic Sensing using a 3 x 3 Coupler and Symmetric Demodulation Scheme." Thesis, Virginia Tech, 2016. http://hdl.handle.net/10919/73370.
Full textMaster of Science
Leandro, Silvana Castro. "Síntese e caracterização óptica de vidros da família TeO2 -B2O3 -(Bi2O3 ou WO3) /." Ilha Solteira, 2018. http://hdl.handle.net/11449/157392.
Full textResumo: Vidros a base de óxidos de metais pesados (TeO2, WO3, Bi2O3) apresentam alto índice de refração, altos valores de não-linearidade óptica e alta constante dielétrica. Essas propriedades físicas possibilitam diversas aplicações, como, por exemplo, para comutação ultrarrápida em dispositivos ópticos e, exibem, quando dopados com terras raras, importantes propriedades de luminescência [1]. Vidros dos sistemas ternários xTeO2 – yB2O3 – zWO3 e xTeO2 – yB2O3 – kBi2O3 foram preparados pelo método “melt-quenching” com x de 70 a 45%mol, y de 40 a 10%mol, z de 30 a 15%mol e k com variação de 20 a 10%mol. Introduzimos o óxido de Boro para dar maior viscosidade ao material e aumentar a estabilidade térmica. Foram obtidas amostras homogêneas e transparentes para as seguintes composições: 70TeO2–10B2O3–20WO3, 70TeO2–20B2O3–10Bi2O3 e 55TeO2 –30B2O3–15Bi2O3. Dados de espectroscopia de IR revelaram que a rede dos vidros consiste basicamente das seguintes unidades estruturais: [TeO4], [WO4], [WO6], [BO4], [BO3] e Te-O-W para o sistema TeO2 – B2O3 – WO3 e de [TeO4], [BiO3], [BiO6], [BO4], [BO3] para o sistema TeO2 – B2O3 – Bi2O3. Medidas de absorção óptica das amostras foram realizadas antes e após a exposição a irradiação gama em doses de 10Gy, 1kGy, 10kGy e 50kGy e forneceram valores das bordas de absorção no intervalo de 378 a 449 nm. Obtiveram-se índices de refração da ordem de n > 2 em 633 nm através do equipamento Interferômetro de Michelson e método do ângulo de Brewster. As energias do g... (Resumo completo, clicar acesso eletrônico abaixo)
Abstract: Glasses based on heavy metal oxides (TeO2, WO3, Bi2O3) have high refractive index, high values of optical nonlinearity and high dielectric constant. These physical properties enable a variety of applications, such as for ultrafast switching in optical devices and, when doped with rare earths, exhibit important luminescence [1]. Glasses in the ternary systems xTeO2–yB2O3–zWO3 and xTeO2–yB2O3–kBi2O3 were prepared from melt quenching method with x from 70 to 45 mol%, y from 40 to 10 mol%, z from 30 to 15 mol% and k with variation from 20 to 10 mol%. We introduce the Boron oxide to give a higher viscosity to the material, ie, higher thermal stability. Homogeneous and transparent samples were obtained for the following compositions: 70TeO2–10B2O3–20WO3, 70TeO2–20B2O3–10Bi2O3 and 55TeO2 –30B2O3–15Bi2O3. FTIR spectroscopy data revealed that the glass basically consists of the following structural units: [TeO4], [WO4], [WO6], [BO4], [BO3] and Te-O-W to the system TeO2–B2O3–WO3 and [TeO4], [BiO3], [BiO6], [BO4], [BO3] to the system TeO2–B2O3–Bi2O3. Optical absorption measurements of the samples were performed before and after exposure to gamma irradiation at doses of 10Gy, 1kGy, 10kGy and 50kGy and provided absorption edge values in the range of 378 to 449 nm. Were obtained refractive index of the order of n> 2 at 633 nm through the equipment Michelson´s Interferometer and Brewster's angle method. The optical gap energies obtained from these glasses are of the order of ≈ 2 to 3 eV.
Doutor
Freiberger, Manuel. "A time domain optical coherence tomograph for laboratory investigations on phantoms and human skin." Thesis, Linköping University, Department of Biomedical Engineering, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-3852.
Full textOptical coherence tomography is an imaging modality with an outstanding resolution. During the project, a time domain OCT system based on a Michelson fibre interferometer was implemented and put into operation. A super-luminescent diode with a centre wavelength of 1295nm and a bandwidth of 45nm was selected as light source and a linear variable delay line as reference. Basic tests were made on phantoms constructed of filter foils and on gel-like agar slices with optical properties similar to human tissue. It was shown that the achievable resolution was at least 36um and can be increased. The system can easily be enhanced to create two-dimensional images.
Optische Kohärenztomographie ist ein bildgebendes Verfahren mit einer hervorragenden räumlichen Auflösung. Im Laufe des Projekts wurde ein OCT-System basierend auf einem faseroptischen Michelson-Interferometer implementiert und in Betrieb genommen. Als Lichtquelle wurde eine Superlumineszenzdiode mit einer Mittenwellenlänge von 1295nm und einer Bandbreite von 45nm gewählt. Eine variable optische Verzögerungsleitung diente als Referenz. Erste Messungen an Filterfolien und gelähnlichen Agarphantomen, die die optischen Eigenschaften von menschlichem Gewebe nachbildeten, lieferten eine räumliche Auflösung von mindestens 36um. Durch die modulare Bauweise ist das System leicht für zweidimensionale Aufnahmen erweiterbar.
Sikora, Vojtěch. "Zpracování signálů z optovláknových senzorů." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2018. http://www.nusl.cz/ntk/nusl-377123.
Full textFattaccioli, Dominique. "Etudes theoriques sur les interferometres pour la detection des ondes de gravitation." Paris 6, 1987. http://www.theses.fr/1987PA066366.
Full textBroberg, Marina. "FTIR method for analysis of synthesis gas." Thesis, Linköpings universitet, Institutionen för fysik, kemi och biologi, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-94539.
Full textMalak, Karam Maurine. "A contribution to photonic MEMS : study of optical resonators and interferometers based on all-silicon Bragg reflectors." Phd thesis, Université Paris-Est, 2011. http://tel.archives-ouvertes.fr/tel-00769408.
Full textShaddock, Daniel Anthony, and Daniel Shaddock@jpl nasa gov. "Advanced Interferometry for Gravitational Wave Detection." The Australian National University. Faculty of Science, 2001. http://thesis.anu.edu.au./public/adt-ANU20020227.171850.
Full textGill, Michael W. "Design, validation and prototype testing of a high resolution all-reflection Michelson interferometer for solar occultation measurements of the OI 1304-Å triplet emission /." Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1994. http://handle.dtic.mil/100.2/ADA283705.
Full textGill, Michael W. "Design, validation and prototype testing of a high resolution all-reflection Michelson interferometer for solar occultation measurements of the OI 1304-ΩA triplet emission." Thesis, Monterey, California. Naval Postgraduate School, 1994. http://hdl.handle.net/10945/30815.
Full textDěcká, Klára. "Interferometrické měření fázových změn optického svazku v turbulenci." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2018. http://www.nusl.cz/ntk/nusl-377040.
Full textRozsypal, Filip. "Senzor na bázi optovláknového interferometru." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2019. http://www.nusl.cz/ntk/nusl-400895.
Full textKovaľová, Soňa. "Interferometrické měření optického signálu v turbulenci." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2019. http://www.nusl.cz/ntk/nusl-401960.
Full textFriederich, Felix [Verfasser], and J. [Akademischer Betreuer] Orphal. "Auswirkungen präzipitierender Teilchen auf NO und NO2 der oberen Stratosphäre und unteren Mesosphäre: Messungen des Michelson Interferometer for Passive Atmospheric Sounding (MIPAS) / Felix Friederich. Betreuer: J. Orphal." Karlsruhe : KIT-Bibliothek, 2014. http://d-nb.info/1052263615/34.
Full textKováč, Petr. "Využítí Michelsonova interferometru pro detekci optického signálu a měření malých odchylek polohy." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2008. http://www.nusl.cz/ntk/nusl-217659.
Full textRýc, Jan. "Michelsonův interferometr." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2011. http://www.nusl.cz/ntk/nusl-218901.
Full textMiché, Pierre. "Automatisation d'un spectromètre intégral à étalon de Fabry-Perot : développement d'un capteur d'indice à haute résolution, commandé par ordinateur." Rouen, 1987. http://www.theses.fr/1987ROUES012.
Full textFilho, Antonio Francisco Gomes Furtado. "Estudo do desempenho do Multiplexador/Demultiplexador add/dropbaseado na configuraÃÃo do InterferÃmetro de Michelson de fibras Ãpticas para aplicaÃÃes em sistemas OTDMA e OCDMA." Universidade Federal do CearÃ, 2012. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=7784.
Full textCoordenaÃÃo de AperfeiÃoamento de Pessoal de NÃvel Superior
Neste trabalho, alÃm dos capÃtulos que envolvem a teoria e definiÃÃes, foi basicamente divido em trÃs estudos: Primeiro (capÃtulo 4), apresentamos uma investigaÃÃo numÃrica do desempenho de um filtro passa-banda totalmente Ãptico composto por um acoplador direcional duplo seguido de duas grades de Bragg simetricamente iguais gravadas nos seus braÃos de saÃda. Esta configuraÃÃo caracteriza um InterferÃmetro de Michelson com caracterÃsticas de um filtro add/drop. As caracterÃsticas de transmissÃo (T), taxa de extinÃÃo (XR) e âcrosstalkâ (XT) foram estudadas a partir da aplicaÃÃo de um sinal CW (onda contÃnua) na entrada do dispositivo. A teoria de modos acoplados e o mÃtodo de Runge Kutta de 4a ordem foram aplicados, respectivamente para resolver as equaÃÃes diferenciais acopladas. Este à o primeiro estudo feito considerando a nÃo linearidade do acoplador e a linearidade das grades de Bragg. O dispositivo apresenta um comportamento altamente nÃo-linear em funÃÃo do defasamento entre as amplitudes dos feixes refletidos e em funÃÃo da potÃncia de entrada. Num segundo momento (capÃtulo 5) apresentamos a propagaÃÃo e chaveamento de pulsos ultracurto (~2ps) usando um interferÃmetro de Michelson de Fibras Ãpticas. Neste estudo o desempenho do interferÃmetro à estudado como uma funÃÃo das caracterÃsticas nÃo lineares do acoplador e das grades de Bragg. Os estudos numÃricos foram feitos a partir das equaÃÃes de modos acoplados resolvidas usando o mÃtodo de Runge-Kutta de 4 ordem. As caracterÃsticas de chaveamento do pulso foram analisadas em funÃÃo da potÃncia de entrada e do defasamento aplicado em uma das grades de Bragg. As caracterÃsticas de transmissÃo (T), coeficiente de ExtinÃÃo (XR), âcrosstalkâ (XT), fator de compressÃo (FC). Utilizamos trÃs valores de potÃncia de entrada: abaixo da potÃncia critica (P0=1W), igual a potÃncia crÃtica (P0=1,73W) e acima da potÃncia crÃtica (P0=1,95W). AtravÃs deste estudo, pode-se verificar que a transmissÃo, taxa de extinÃÃo, âcrosstalkâ e fator de compressÃo dependem da potÃncia da bombeio inserida no dispositivo e da defasagem aplicada. O interferÃmetro de Michelson em fibras implementa componente de grande importÃncia para aplicaÃÃes em redes Ãpticas, como os demultiplexadores add/drop. Este dispositivo tem atraÃdo bastante interesse no campo das telecomunicaÃÃes devido a sua alta capacidade de taxas de transmissÃo. Num terceiro momento foi apresentado um estudo de simulaÃÃo numÃrica do desempenho da codificaÃÃo e decodificaÃÃo de pulsos Ãpticos curtos (ps) em sistemas OCDMA (Optical Code Division Multiple Access â acesso VIII mÃltiplo por divisÃo de cÃdigo no domÃnio Ãptico) baseado em FBG (Fiber Bragg Grating â grade de Bragg em fibra Ãptica) onde os cÃdigos sÃo inseridos atravÃs de saltos discretos na fase Ãptica (Âπ). Para geraÃÃo de pulsos codificados foram utilizados cÃdigos de Gold obtidos analiticamente. Analisamos como a inserÃÃo de cÃdigos adicionais afetam a autocorrelaÃÃo e correlaÃÃo cruzada. O interferÃmetro de Michelson inicialmente estudado no capÃtulo 4 foi utilizado para propagaÃÃo e chaveamento de sinais codificados. Baseados nas caracterÃsticas de TransmissÃo (T) e Taxa de extinÃÃo (XR) fizemos um estudo do dispositivo como multiplexador /demultiplexador add/drop na recuperaÃÃo de pulsos codificados.
This work, in addition the chapters which involves both theory and definitions, was basically divided three studies: First (chapter 4),we present a numerical investigation of the performance of a bandpass filter composed of an all-optical directional coupler, followed by two double bars Bragg recorded symmetrically equal outputs in their arms. This configuration features a Michelson interferometer with characteristics of an add/ drop filter. The transmission characteristics (T), extinction rate (XR) and "crosstalk" (XT) were studied based on the application of a CW signal (continuous wave) into the device. Theory of coupled modes and the Runge Kutta fourth order were applied respectively to solve the coupled differential equations. This is the first study considering the nonlinearity of the coupler and the linearity of Bragg gratings. The device features a highly nonlinear behavior as a function of dephasing between the amplitudes of the reflected beams and depending on the input power. In a second step (section 5), the propagation and switching of ultrashort pulse (~ 2PS) Michelson interferometer using an optical fiber. In this study the performance of the interferometer is studied as a function of the nonlinear characteristics of the coupler and Bragg gratings. The numerical studies were made from the coupled mode equations solved using the Runge-Kutta 4th order. The pulse switching characteristics were analyzed as a function of input power and applied to one dephasing Bragg gratings. The transmission characteristics (T), extinction coefficient (XR), "crosstalk" (XT), the compression factor (CF)and shape of the pulses were analyzed for different values of phase and different input powers. We use three values of input power: below the critical power (1W = P0), equal to the critical power (P0 = 1.73W) and above the critical power (P0 = 1.95W). Through this study, it is found that the transmission rate of extinction, "crosstalk" and compression factor depends on the power of the pump device inserted into the gap and applied The Michelson interferometer fiber implement major component with applications in optical networks, such as demultiplexers add/drop. This device has attracted considerable interest in the field of telecommunications due to its ability of high transmission rates. In the third place was presented a numerical simulation study of the performance of encoding and decoding of short optical pulses (ps) systems OCDMA (Optical Code Division Multiple Access based on FBG (Fiber Bragg Grating ) where codes are inserted through discrete jumps in the optical phase (Â π). For generation of coded pulses were used Gold codes obtained analytically. We look at how the inclusion of additional codes affect the autocorrelation and cross correlation.The Michelson interferometer initially studied Chapters 4 was used for propagation and switching of encrypted signals. Based on the characteristics of transmission (T) and extinction rate (XR) did a study of the device as multiplexer/demultiplexer add / drop in the recovery of coded pulses.
Seaman, Shane Thomas. "Material Related Effects on the Structural Thermal Optical Performance of a Thermally Tunable Narrowband Interferometric Spectral Filter." Diss., Virginia Tech, 2019. http://hdl.handle.net/10919/90799.
Full textDoctor of Philosophy
LiDAR (an acronym for Light Detection and Ranging) is a technology that can be used to measure properties of the atmosphere. It is similar to radar, but uses much smaller light waves rather than larger radio waves, enabling more detailed information to be obtained. High Spectral Resolution Lidar (HSRL) is a lidar technique that uses a high precision optical filter to distinguish between light that scatters from particulates (such as dust, smoke, or fog) and light that scatters from molecules (such as oxygen, nitrogen, or carbon dioxide) in the atmosphere. By separating the two types of backscattered light, higher accuracy measurements are possible that will enable improvements in climate models, air quality measurements, and climate forecasting. A spaceborne HSRL instrument can provide great impact in these areas by enabling near-continuous measurements across the Earth; however, the optical filter technology has typically been too complex for reliable long-duration spaceflight due to the need for complicated and expensive additional hardware. In this research, a high-performance HSRL optical filter that can be reliably operated by simply monitoring and adjusting the temperature has been designed, built, and tested. The greatly-reduced operational complexity has been made possible through a new process that enables more accurate prediction of the complicated interactions between the materials of the optical filter. This process is based on a combination of high-accuracy characterization of the materials and detailed structural-thermal-optical-performance (STOP) modeling. The overall design process, fabrication procedures, and characterization of the optical filter are presented.
Wylde, Clarissa Eileen Kenney, and Clarissa Eileen Kenney Wylde. "The Art of Optical Aberrations." Thesis, The University of Arizona, 2017. http://hdl.handle.net/10150/624090.
Full textŠevčík, Michal. "Nanometrologická vibrometrie." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2013. http://www.nusl.cz/ntk/nusl-220217.
Full textHUBERT, SEBASTIEN. "Interferometrie de plasmas denses utilisant un laser x-uv. Developpement d'un interferometre de michelson x-uv a 13,9 nm." Paris 11, 2001. http://www.theses.fr/2001PA112073.
Full textKedia, Sunny. "Optical Communication Using Hybrid Micro Electro Mechanical Structures (MEMS) and Commercial Corner Cube Retroreflector (CCR)." Scholar Commons, 2015. http://scholarcommons.usf.edu/etd/5969.
Full textGálvez, Límaco Ángel Manuel. "Demodulação digital usando sinais em quadratura e controle de fase óptica aplicada a um vibrômetro baseado em um interferômetro de Michelson modificado /." Ilha Solteira, 2020. http://hdl.handle.net/11449/192101.
Full textResumo: Nesta dissertação de mestrado é apresentado um vibrômetro para a medição de deslocamentos nanométricos. O vibrômetro proposto está baseado em um interferômetro de Michelson modificado, homódino e em malha fechada. A demodulação em tempo real é executada inteiramente em modo digital, utilizando uma plataforma embarcada que realiza a aquisição de dados, processamento dos sinais, controle PI (proporcional-integral) e a geração dos sinais que acionam o modulador de fase óptica (baseado em uma célula Pockels) e o atuador piezoelétrico sob estudo. Dois sinais em quadratura de fase são obtidos a partir de um único sinal interferométrico utilizando uma tensão de modulação principal e, em seguida, a conhecida técnica de multiplicação cruzada é aplicada para calcular a variação da fase óptica de interesse. A condição de quadratura é atingida pelo próprio controlador PI por meio da análise da figura de Lissajous dos sinais fora de fase. O novo vibrômetro óptico é capaz de medir deslocamentos nanométricos, e é simples, barato, exato, imune ao desvanecimento e auto-consistente. O controlador PI é robusto, uma vez que o método de demodulação é capaz de trabalhar com elevado ruído eletrônico, variações indesejáveis no ganho do amplificador e na tensão de meia-onda da célula Pockels com a temperatura e outras perturbações externas. O novo sistema foi utilizado para determinar a magnitude da resposta em frequência de dois protótipos de atuadores piezoelétricos flextensionais multiatuados. As ... (Resumo completo, clicar acesso eletrônico abaixo)
Abstract: A vibrometer to measure nanometric displacements is presented in this work. The proposed vibrometer is based on a modified closed loop homodyne Michelson interferometer. Real-time phase demodulation is carried out entirely in a digital mode, using an embedded platform that performs data acquisition, signal processing, PI (proportional-integral) control and the generation of signals that drive the electrooptic Pockels cell phase shifter and the piezoelectric actuator under test. Two phase quadrature signals are generated from a single interferometric output, using the interleaving action, in alternation, of a digitally generated principal modulating signal, and then the well-known cross-multiplication technique is applied to perform the computation of the phase shift of interest. The quadrature condition is reached by the PI control itself, using the length difference between the major axis and the minor axis of the ellipse formed by the Lissajous figure associated with the out of phase signals as the controller error signal. The new optical vibrometer is capable of measuring nanometric displacements, and is simple, inexpensive, accurate, immune to fading and self-consistent. The PI controller is robust, since the demodulation method is able to work under high electronic noise, undesirable variations in Pockels cell half-wave voltage with temperature, amplifier gain and other external entrances. The new method was used to determine the displacement frequency response curves of... (Complete abstract click electronic access below)
Mestre
Brož, Petr. "Zpracování a analýza oftalmologických obrazů a dat." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2012. http://www.nusl.cz/ntk/nusl-219730.
Full textHan, Chen, and 陳翰. "A Homemade Optoelectronic Michelson Interferometer." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/35986955547731537525.
Full text輔仁大學
物理學系碩士班
102
Using a low-cost and commercially available phototransistor and a Schmitt trigger with immunity to false triggering as the light sensor and the waveform converter respectively, as well as a homemade counter, we successfully designed and constructed a simple reliable optoelectronic Michelson interferometer for an undergraduate optics laboratory. The results of experiments for measuring the wavelengths of red helium-neon laser light, blue Argon-ion laser light, and home-made infra-red Nd:YVO4 laser light achieve better than 0.1% accuracy using a bar made of memory foam material as a lever to rotate the micrometer to move a linear translation stage. Due to the deficiency of an effective approach to focus low -intensity yellow light emitted from sodium lamps, we cannot measure the wavelength and coherence length of yellow sodium light, and the visibility of interference fringes for the time being.
Babcock, David D. "Mesospheric Imaging Michelson Interferometer instrument development and observations /." 2006. http://proquest.umi.com/pqdweb?index=1&did=1251892871&SrchMode=1&sid=3&Fmt=2&VInst=PROD&VType=PQD&RQT=309&VName=PQD&TS=1195659544&clientId=5220.
Full textTypescript. Includes bibliographical references (leaves 144-148). Also available on the Internet. MODE OF ACCESS via web browser by entering the following URL: http://proquest.umi.com/pqdweb?index=1&did=1251892871&SrchMode=1&sid=3&Fmt=2&VInst=PROD&VType=PQD&RQT=309&VName=PQD&TS=1195659544&clientId=5220
Nußhardt, Michael [Verfasser]. "Ein Michelson-Interferometer für Röntgenstrahlen / vorgelegt von Michael Nußhardt." 1999. http://d-nb.info/960515607/34.
Full textLi, Guo-Wei, and 李國威. "Michelson Interferometer for Phase Lock of an Optical Lattice." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/61741391701676294652.
Full textLin, Fu-Jeng, and 林福正. "Quadrature Phase Michelson Interferometer and Compensation of Nonlinear Errors." Thesis, 1994. http://ndltd.ncl.edu.tw/handle/87674505198934333453.
Full textshie, Yilin, and 謝易霖. "The Fabrication and Investigation of White-Light Michelson Interferometer." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/82503116013905115544.
Full text明新科技大學
電子工程研究所
96
A white-light Michelson interferometer with a green band-pass filter is built, that is mainly used for measuring surface profiles on large regions with large varieties of height. A laser alignment is used to approach the lengths of both optical paths. The three dimension surface profiles are reconstructed by the white-light vertical scanning interference interferometry and zero order interference fringe identification. The experimental results show that the surface profiles, with the height of adjacent pixels more than a quarter wavelength, are successfully measured with same errors by the white-light interferometry. The relationship between applied voltages and displacement of piezoelectric transducer devices is also accurately measured in this research by both using analyses of phase shifting interferometry algorithms and setting up a Twyman-Green interferometer. This relationship is applied in the white-light Michelson interferometer for automation measurement and improves the resolution and repeatability of experimental measurements.
JHAN, RU-PING, and 詹汝平. "The Digital PGC Demodulation System of Michelson Interferometer Sensor." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/dgxp66.
Full text國立虎尾科技大學
光電工程系光電與材料科技碩士班
107
In this thesis, the Michelson Interferometer sensor combined with an optical switch is used to form a parallel time-division multiplexed Michelson interferometer interference sensing system. The optical switch is used as a component of the switching sensor to generate different vibration signals and phase modulation with the reference arm. The Faraday Rotating Mirror (FRM) element produces a non-polarization architecture by replacing the fiber optic mirror with a change in the polarization state caused by the fiber. The use of an optical switch as a component for switching users enhances the practical functions of this time-multiplexed system. Field Programmable Gate Array (FPGA) is used for data observation and acquisition and digital signal processing. In terms of phase demodulation, we propose two techniques for PGC demodulation: first, Differentiate-and-cross-multiplication (DCM) and second, arctangent algorithm. The MATLAB program was used to simulate and analyze the two technologies. By recording and analyzing the interference signals of these sensors through the FPGA module, the Michelson Interferometer (MI) phase modulation fiber sensor can be realized, which can overcome the shortcomings of many conventional systems. And for its practical application problems, it proposes effective and practical optimization and improvement techniques.