Дисертації з теми "Interferometric detector"
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Casanueva, Diaz Julia. "Control of the gravitational wave interferometric detector Advanced Virgo." Thesis, Université Paris-Saclay (ComUE), 2017. http://www.theses.fr/2017SACLS209/document.
Повний текст джерелаThe first detection of a Gravitational Wave (GW) was done on September 14 th of 2015 by the LIGO-Virgo collaboration with the two LIGO detectors. It was emitted by the merger of a Binary Black Hole, providing the first direct proof of the existence of Black Holes. Advanced Virgo is the upgraded version of the Virgo interferometer and it will join the LIGO detectors in the next months. The passage of a GW on Earth induces a change on the distance between test masses (experiencing only the gravitational interaction) in a differential way. This distance variation is proportional to the amplitude of the GW however the largest displacement observable on Earth will be of the order of 10⁻¹⁹ m/sqrt(Hz). Taking this in account, a Michelson interferometer is the ideal instrument to detect this differential effect. GWs detectors will use suspended mirrors to behave as test masses. The passage of a GW will cause a change on the distance between the mirrors that will spoil the interference condition, allowing some light to leak to the detection photodiode. However, a simple Michelson interferometer does not provide enough sensitivity. For this reason the first generation of detectors added Fabry-Perot cavities in the arms, in order to increase the optical path. A second change was the addition of an extra mirror in order to recycle the light that comes back towards the laser, to increase the effective power, creating a new cavity also known as Power Recycling Cavity (PRC). Its effect is more important when the Michelson is tuned in an optimal way in a dark fringe. All the mirrors of the detector are affected by the seismic noise and so their distance is continuously changing. It is necessary to control the longitudinal and angular position of the cavities in order to keep them at resonance. During my thesis I have studied the control of Advanced Virgo using simulation and during the commissioning itself. First of all I have simulated the control strategy used in Virgo using modal simulations. The aim was to check if the same strategy could be applied to Advanced Virgo or if it needs adaptation. In Advanced Virgo the Fabry-Perot cavities have a higher finesse, which arises new dynamical problems and requires a special control strategy that I have modified to match the commissioning needs. Regarding the PRC, we have studied the impact of its stability on the performance of the interferometer. As it is very close from the instability region, the electrical field inside will be very sensitive to alignment and matching of the laser beam. We have checked using simulations its impact on the longitudinal controls, which can become unstable, and a solution has been validated. Then I have used this information during the commissioning of the Advanced Virgo detector. In this thesis the details of the commissioning of the longitudinal and angular control of the interferometer will be presented. It includes the frequency stabilization, which has a key role in the control of the interferometer, since it is the dominant noise
Nishizawa, Atsushi, Seiji Kawamura, Tomotada Akutsu, Koji Arai, Kazuhiro Yamamoto, Daisuke Tatsumi, Erina Nishida, et al. "Laser-interferometric detectors for gravitational wave backgrounds at 100 MHz: Detector design and sensitivity." American Physical Society, 2008. http://hdl.handle.net/2237/11308.
Повний текст джерелаTripp, Everett. "Interferometric Optical Readout System for a MEMS Infrared Imaging Detector." Digital WPI, 2012. https://digitalcommons.wpi.edu/etd-theses/222.
Повний текст джерелаRegehr, Martin W. Drever Ronald W. P. Drever Ronald W. P. Yariv Amnon Raab Frederick J. "Signal extraction and control for an interferometric gravitational wave detector /." Diss., Pasadena, Calif. : California Institute of Technology, 1995. http://resolver.caltech.edu/CaltechETD:etd-10192007-092215.
Повний текст джерелаGossler, Stefan. "The suspension systems of the interferometric gravitational-wave detector GEO 600." [S.l. : s.n.], 2004. http://deposit.ddb.de/cgi-bin/dokserv?idn=972116710.
Повний текст джерелаKerr, G. A. "Experimental developments towards a long-baseline laser interferometric gravitational radiation detector." Thesis, University of Glasgow, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.378181.
Повний текст джерелаTröbs, Michael. "Laser development and stabilization for the spaceborne interferometric gravitational wave detector LISA." [S.l. : s.n.], 2005. http://deposit.ddb.de/cgi-bin/dokserv?idn=974983705.
Повний текст джерелаHughes, Roy John. "The application of array detector technology to interferometric spectroscopy : design, analysis and development." Thesis, Queensland University of Technology, 1994.
Знайти повний текст джерелаGras, Slawomir M. "Opto-acoustic interactions in high power interferometric gravitational wave detectors." University of Western Australia. School of Physics, 2009. http://theses.library.uwa.edu.au/adt-WU2010.0093.
Повний текст джерелаBADARACCO, FRANCESCA. "Newtonian Noise studies in 2nd and 3rd generation gravitational-wave interferometric detectors." Doctoral thesis, Gran Sasso Science Institute, 2021. http://hdl.handle.net/20.500.12571/16065.
Повний текст джерелаAshraf, Shakeel. "Evolution of IR Absorber for Integration in an IR Sensitive CO2 Detector." Thesis, Mittuniversitetet, Institutionen för informationsteknologi och medier, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:miun:diva-14088.
Повний текст джерелаRogan, Aaron Matthew. "Gravitational wave detection, detector characterization, and parameter estimation using a network of interferometer detectors." Online access for everyone, 2006. http://www.dissertations.wsu.edu/Dissertations/Fall2006/a_rogan_121406.pdf.
Повний текст джерелаBoulanger, Jean-Luc. "Detection interferometrique des ondes de gravitation : dynamique des fabry-perot pendulaires, evaluation des reseaux d'antennes." Paris 6, 1988. http://www.theses.fr/1988PA066099.
Повний текст джерелаKitano, Cláudio. "Métodos inéditos de interrogação óptica e suas aplicações na medição de grandezas físicas." Ilha Solteira, 2016. http://hdl.handle.net/11449/149249.
Повний текст джерелаBanca: Josemir Coelho Santos
Banca: Marco Isaías Alayo Chávez
Banca: Aparecido Augusto de Carvalho
Banca: Ricardo Tokio Higuti
Resumo: Neste Texto Sistematizado, o candidato a Livre Docente expõe os principais resultados alcançados em sua trajetória após o doutorado, em termos de atividades de ensino, extensão, administrativas e de pesquisa. Ênfase especial é destinada à análise crítica das atividades de pesquisa e orientação de dissertações e teses junto ao Programa de Pós-Graduação em Engenharia Elétrica - PPGEE, da FE-IS UNESP. O enfoque principal da pesquisa refere-se à proposição teórica e experimental de novas técnicas de detecção de fase óptica empregando-se interferometria laser, e suas aplicações na medição de deslocamentos microscópicos, na caracterização de atuadores piezoelétricos flextensionais e em medições de tensões elétricas elevadas. A motivação para a realização da pesquisa, a exposição dos desafios e as soluções propostas são discutidas. Inserções em outras áreas, que envolvam sensores e sistemas ópticos, bem como, a cooperação com grupos de pesquisas afins, internos e externos à FE-IS UNESP, são apresentadas. No final, discutem-se as pesquisas atuais e as perspectivas futuras
Goltsman, Alexander Mark. "Three Dimensional Interferometric Imaging at Terahertz Frequency for Concealed Object Detection." Thesis, Virginia Tech, 2011. http://hdl.handle.net/10919/36351.
Повний текст джерелаMaster of Science
Menezes, Jacson Weber de. "Fabricação e caracterização de estruturas periódicas utilizando superposição de padrões de interferência para aplicações em fotônica e plasmônica." [s.n.], 2010. http://repositorio.unicamp.br/jspui/handle/REPOSIP/260707.
Повний текст джерелаTese (doutorado) - Universidade Estadual de Campinas, Faculdade de Engenharia Elétrica e de Computação
Made available in DSpace on 2018-08-16T22:14:56Z (GMT). No. of bitstreams: 1 Menezes_JacsonWeberde_D.pdf: 5102435 bytes, checksum: 8671ed8cf6b070b06a3270b5e81fde66 (MD5) Previous issue date: 2010
Resumo: Esta tese tem como objetivo demonstrar a viabilidade e o potencial da técnica de superposição de padrões de interferência para fabricação de estruturas periódicas 2D e 3D para aplicações em cristais fotônicos e estruturas plasmônicas. A superposição de padrões consiste em expor a mesma amostra a padrões de interferência, produzidos por duas ondas planas, girando-se a amostra apropriadamente entre as exposições. A simulação do padrão de intensidade resultante, em função do número de exposições e do ângulo de rotação entre elas, foi feita utilizando o software MATHEMATICA. Estas simulações demonstraram que com apenas 3 exposições, girando-se apropriadamente a amostra, é possível obtermos padrões com periodicidade tridimensional. As estruturas gravadas na fotorresina positiva SC 1827, utilizando esta técnica, mostraram uma excelente concordância com os padrões simulados. Embora estas estruturas não apresentem um gap fotônico completo devido ao baixo índice de refração da fotorresina, foi possível medir o gap fotônico para determinadas direções de simetria da estrutura. Camadas Finas de Cristais Fotônicos 2D com simetria triangular foram fabricadas em vidros calcogenetos a base de antimônio. As medidas da transmitância espectral em função do ângulo de incidência da luz nas diferentes direções de simetria permitiram a medida experimental do diagrama de bandas. Para os modos mais baixos as medidas experimentais mostraram uma excelente concordância com os diagramas de bandas calculados utilizando o Método dos elementos finitos (FEM). Estruturas plasmônicas, compostas por arranjos quadrados de furos em filmes de ouro foram fabricadas e caracterizadas através de medidas de transmitância à incidência normal. Devido à grande sensibilidade da posição dos picos de ressonância de plasmons com o meio, foi realizado um estudo visando a otimização dos parâmetros destas estruturas para uso como sensores de índice de refração
Abstract: The purpose of this thesis is to demonstrate the feasibility and the potential of the technique of superposition of interference patterns to generate 2D and 3D periodic structures for applications in photonic crystals and plasmonic structures. This technique consists in to expose the same sample to interference patterns produced by two plane waves, rotating properly the sample between exposures. The simulation of the resulting intensity pattern, as a function of the number of exposures and rotation angle between them, is done using the software MATHEMATICA. These simulations showed that only 3 exposures are enough to obtain three-dimensional periodic patterns. The structures recorded in SC 1827 positive photoresist, using this technique, showed excellent agreement with the simulated patterns. Although these structures do not show a complete photonic band gap because of the low refractive index of the photoresist, it was possible to measure the photonic band gap photonic for certain directions of symmetry of the structure. Thin layers of 2D Photonic Crystals with triangular symmetry were fabricated in chalcogenide glasses based on antimony. Measurements of spectral transmittance, at different incident angles in the directions of symmetry of the 2D crystal, allow obtaining the experimental band diagrams. For the lowest modes the experimental measurements agree very well with the diagrams calculated using the FEM. Plasmonic structures, composed of squared arrays of holes in gold films were fabricated and characterized through transmittance measurements at normal incidence. Due to the high sensitivity of the peak wavelength positions of plasmon resonances with the surrounding media, a study was conducted in order to optimize the parameters of these structures for refractive index sensing
Doutorado
Eletrônica, Microeletrônica e Optoeletrônica
Doutor em Engenharia Elétrica
Zeakes, Jason S. "Extrinsic Fabry-Perot Interferometric hydrogen gas sensor." Thesis, This resource online, 1994. http://scholar.lib.vt.edu/theses/available/etd-06162009-063525/.
Повний текст джерелаTaylor, John R. "Interferometric experiments towards advanced gravitational wave detectors." Thesis, University of Glasgow, 2009. http://theses.gla.ac.uk/727/.
Повний текст джерелаKillbourn, Stuart Duncan. "Double pendulums for terrestrial interferometric gravitational wave detectors." Thesis, University of Glasgow, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.362943.
Повний текст джерелаHusman, Matthew Edward. "Suspension and control for interferometric gravitational wave detectors." Thesis, University of Glasgow, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.312701.
Повний текст джерелаMavalvala, Nergis. "Alignment issues in laser interferometric gravitational-wave detectors." Thesis, Massachusetts Institute of Technology, 1997. http://hdl.handle.net/1721.1/10769.
Повний текст джерелаBuikema, Aaron. "High-power operation of interferometric gravitational-wave detectors." Thesis, Massachusetts Institute of Technology, 2020. https://hdl.handle.net/1721.1/128328.
Повний текст джерелаThesis: Ph. D., Massachusetts Institute of Technology, Department of Physics, February, 2020
Cataloged from PDF version of thesis.
Includes bibliographical references (pages 157-172).
With the conclusion of the first two observing runs of the Advanced LIGO detectors, which saw the first direct detection of gravitational waves, we are firmly in the era of gravitational-wave astronomy. To reach the highest sensitivities, current interferometric gravitational-wave detectors are designed for hundreds of kilowatts of circulating optical power. At these high circulating powers, the sensitivity of the detectors to gravitational waves will be limited by the quantum properties of the light: shot noise at frequencies above ~ 100 Hz, and quantum radiation pressure noise at lower frequencies. To reach the high powers necessary for achieving the quantum noise limits imposed by the light, it is essential to solve the control problems and understand the additional noise introduced by high power operation. Additionally, development of high-power laser sources that reach the stringent noise and reliability requirements is crucial. This work comprises three experiments aimed at reaching the radiation-pressure-dominated regime of interferometric gravitational-wave detectors. The first part presents results from a high-power, meter-long Fabry-Prot Michelson interferometer to probe classical and quantum radiation pressure effects using a gram-scale mechanical oscillator. The second part is an exploration of the effects of electric fields and charging of test masses on the sensitivity of the LIGO detectors, which may limit the ability to observe radiation-pressure effects. Finally, we describe the development and characterization of a high-power, narrow-linewidth ytterbium-doped fiber amplifier for use in future gravitational-wave detectors.
by Aaron Buikema.
Ph. D.
Ph.D. Massachusetts Institute of Technology, Department of Physics
Rao, Shanti Raja Libbrecht Kenneth George. "Mirror thermal noise in interferometric gravitational wave detectors /." Diss., Pasadena, Calif. : California Institute of Technology, 2003. http://resolver.caltech.edu/CaltechETD:etd-05092003-153759.
Повний текст джерелаWise, Stacy M. "Sensitivity enhancement in future interferometric gravitational wave detectors." [Gainesville, Fla.] : University of Florida, 2006. http://purl.fcla.edu/fcla/etd/UFE0013804.
Повний текст джерелаNightingale, Nicholas Simon. "Stellar interferometry : detectors and the atmosphere." Thesis, University of Cambridge, 1991. https://www.repository.cam.ac.uk/handle/1810/265401.
Повний текст джерелаMenezes, João Paulo Crivellaro de [UNESP]. "Análise teórica e experimental de um método interferométrico de detecção de fase óptica, auto-consistente e com elevada faixa dinâmica, aplicado à caracterização de atuadores piezoelétricos flextensionais." Universidade Estadual Paulista (UNESP), 2009. http://hdl.handle.net/11449/87033.
Повний текст джерелаConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
Atuadores piezoelétricos convertem energia elétrica em energia mecânica, sendo amplamente utilizados como transdutores de deslocamento micrométricos ou sub-micrométricos de elevada precisão. Neste trabalho, atuadores piezoelétricos flextensionais (APFs), projetados pelo método de otimização topológica, são caracterizados em termos de linearidade entre a tensão de excitação e o deslocamento gerado, bem como em termos de resposta em frequência, utilizando-se um interferômetro de Michelson homódino e em malha aberta. Interferômetros homódinos não realimentados têm seu desempenho prejudicado pelo fenômeno de desvanecimento, causado por perturbações ambientais espúrias que incidem aleatoriamente entre seus braços. Nesta dissertação, enfatizam-se métodos de demodulação de fase óptica baseados em relações envolvendo as componentes espectrais do sinal de saída do interferômetro que são imunes ao problema do desvanescimento. Dentre estes, destacam-se métodos clássicos como J1... J4, J1... J4 modificado, J1... J6 neg e J1... J6 pos. Estes métodos permitem a medição direta de deslocamentos microscópicos, sem a necessidade de qualquer procedimento de calibração. Além disso, não são afetados por instabilidades da fonte óptica, da responsividade do fotodiodo e da visibilidade das franjas de interferência. Contudo, apresentam reduzidas faixas dinâmicas de demodulação de fase. A fim de superar esta deficiência, investiga-se um método adicional de detecção direta, baseado na análise do espectro do sinal fotodetectado, exibindo todas as vantagens dos demais métodos, mas que é capaz de estender a faixa dinâmica de demodulação a valores tão elevados quanto 100 rad. Simulações computacionais são executadas com este método, levando-se em consideração o efeito do desvanecimento e tensões de ruído eletrônico do tipo 1/f, evidenciando...
Piezoelectric actuators convert electrical energy into mechanical energy, being widely used as micrometric or sub-micrometric displacement transducer of high accuracy. In this work, piezoelectric flextensional actuators (PFA’s), designed by the topology optimization method, are characterized in terms of linearity between the drive voltage and the corresponding displacement, as well as in terms of frequency response, using a homodyne, open-loop, Michelson interferometer. Homodyne interferometers without feedback have their performance spoiled by signal fading, caused by spurious environmental disturbances that occur randomly between their arms. This thesis emphasizes methods of optical phase demodulation, based on relations involving the spectral components of the interferometer output signal, which are immune to signal fading. Among these methods, it is detailed here the classical ones, such as J1... J4, modified J1... J4, J1... J6 neg e J1... J6 pos. These methods allow direct measurements of microscopic displacements, free of calibration procedures. Besides, they are not affected by optical source oscillations, photodiode responsivity and interferometric fringe visibility. However, they have reduced dynamic range for phase demodulation. In order to overcome this, this work investigates an additional method for direct detection, based on spectral analysis drawback of the photodetected signal. The method has all the advantages of the others, but it is able to span its demodulation dynamic range to values as high as 100 rad. Numerical simulations are done using this method (considering the signal fading and the 1/f electronic noise voltage), showing its viability to characterize PFA’s. Experiments are performed in laboratory, involving tests with different PFA’s. The method validation is carried out with the aid of an electrooptic intensity modulator, whose phase characteristics can... (Complete abstract click electronic access below)
Heinzel, Gerhard. "Advanced optical techniques for laser interferometric gravitational wave detectors." [S.l. : s.n.], 1999. http://deposit.ddb.de/cgi-bin/dokserv?idn=956318886.
Повний текст джерелаLawrence, Ryan Christopher 1975. "Active wavefront correction in laser interferometric gravitational wave detectors." Thesis, Massachusetts Institute of Technology, 2003. http://hdl.handle.net/1721.1/29308.
Повний текст джерелаIncludes bibliographical references (p. 239-243).
As the first generation of laser interferometric gravitational wave detectors near operation, research and development has begun on increasing the instrument's sensitivity while utilizing existing infrastructure. In the Laser Interferometer Gravitational Wave Observatory (LIGO), significant improvements are being planned for installation in 2007 to increase the sensitivity to test mass displacement, hence sensitivity to gravitational wave strain, by improved suspensions and test mass substrates, active seismic isolation, and higher input laser power. Even with the highest quality optics available today, however, finite absorption of laser power within transmissive optics, coupled with the tremendous amount of optical power circulating in various parts of the interferometer, result in critical wavefront deformations which will cripple the performance of the instrument. Discussed is a method of active wavefront correction via direct thermal actuation on optical elements of the interferometer; or, "thermally adaptive optics". A simple nichrome heating element suspended off the face of an affected optic will, through radiative heating, remove the gross axisymmetric part of the original thermal distortion. A scanning heating laser- will then be used to remove any remaining non-axisymmetric wavefront distortion, generated by inhomogeneities in the substrate's absorption, thermal conductivity, etc. This work includes a quantitative analysis of both techniques of thermal compensation, as well as the results of a proof-of-principle experiment which verified the technical feasibility of each technique.
by Ryan Christopher Lawrence.
Ph.D.
George, A. V. "Optical detectors and stellar observations in interferometry." Thesis, University of Cambridge, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.599357.
Повний текст джерелаKillow, Christian J. "Interferometry developments for spaceborne gravitational wave detectors." Thesis, University of Glasgow, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.426535.
Повний текст джерелаRýc, Jan. "Michelsonův interferometr." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2011. http://www.nusl.cz/ntk/nusl-218901.
Повний текст джерелаCasey, Morag Margaret. "Developments towards autonomous operation of laser interferometric gravitational wave detectors." Thesis, University of Glasgow, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.300656.
Повний текст джерелаFotopoulos, Nickolas. "Searching for stochastic gravitational waves using co-located interferometric detectors." Thesis, Massachusetts Institute of Technology, 2006. http://hdl.handle.net/1721.1/39567.
Повний текст джерелаIncludes bibliographical references (p. 83-85).
Despite their intrinsic advantages due to co-location, the two LIGO (Laser Interferometer Gravitational Wave Observatory) Hanford interferometers have not been used in the search for the stochastic gravitational wave background due to their coupling to a shared environment, which may be comparable to or exceed any gravitational signal. In this thesis, using data from LIGO's fourth science run, we demonstrate a technique to relate the H1-H2 coherence to coupling with physical environmental channels. We show that the correspondence is tight enough to correctly identify regions of high and low coupling and the nature of the coupling in the data set. A simple thresholding provides frequency vetoes, which we can use to derive a significantly cleaner coherence spectrum. Next, using this frequency veto technique and data from the first epoch of LIGO's fifth, currently running science run, we design, implement, and perform a search for astrophysical populations of gravitational wave emitters, which emit predominantly in the kilohertz region of the spectrum, a region totally inaccessible to detectors separated by thousands of kilometers. As well as providing us with a proof-of-concept, the results provide an advanced look at the physical results to come from H1-H2 by the end of S5.
by Nickolas Fotopoulos.
S.M.
Leavey, Sean Stephan. "Enhancing the sensitivity of future laser-interferometric gravitational wave detectors." Thesis, University of Glasgow, 2017. http://theses.gla.ac.uk/7902/.
Повний текст джерелаShaddock, 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.
Повний текст джерелаDennis, Karla Ann. "Characterization of HFAPNB and PHOST as a polymer sensing layer in an interferometric evanescent wave sensor." Thesis, Atlanta, Ga. : Georgia Institute of Technology, 2009. http://hdl.handle.net/1853/29682.
Повний текст джерелаCommittee Chair: Henderson, Clifford L.; Committee Member: Ludovice, Pete; Committee Member: Ralph, Stephen E.. Part of the SMARTech Electronic Thesis and Dissertation Collection.
STAHL, HARLOW PHILIP. "INFRARED PHASE-SHIFTING INTERFEROMETRY USING A PYROELECTRIC VIDICON (TESTING, FABRICATION)." Diss., The University of Arizona, 1985. http://hdl.handle.net/10150/187965.
Повний текст джерелаFattaccioli, Dominique. "Etudes theoriques sur les interferometres pour la detection des ondes de gravitation." Paris 6, 1987. http://www.theses.fr/1987PA066366.
Повний текст джерелаDegallaix, Jerome. "Compensation of strong thermal lensing in advanced interferometric gravitational waves detectors." University of Western Australia. School of Physics, 2006. http://theses.library.uwa.edu.au/adt-WU2006.0060.
Повний текст джерелаMartin, Iain William. "Studies of materials for use in future interferometric gravitational wave detectors." Thesis, University of Glasgow, 2009. http://theses.gla.ac.uk/1517/.
Повний текст джерелаRowan, Sheila. "Aspects of lasers for the illumination of interferometric gravitational wave detectors." Thesis, University of Glasgow, 1995. http://theses.gla.ac.uk/3422/.
Повний текст джерелаTwyford, Sharon Melanie. "Developments towards low mass suspension for laser interferometric gravitational wave detectors." Thesis, University of Glasgow, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.285038.
Повний текст джерелаGoda, Keisuke. "Development of techniques for quantum-enhanced laser-interferometric gravitational-wave detectors." Thesis, Massachusetts Institute of Technology, 2007. http://hdl.handle.net/1721.1/45405.
Повний текст джерелаIncludes bibliographical references (p. 213-225).
A detailed theoretical and experimental study of techniques necessary for quantum-enhanced laser- interferometric gravitational wave (GW) detectors was carried out. The basic theory of GWs and laser-interferometric GW detectors, quantum noise in GW detectors, the theory of squeezed states including generation, degradation, detection, and control of squeezed states using sub-threshold optical parametric oscillators (OPOs) and homodyne detectors, experimental characterization of these techniques (using periodically poled KTiOPO4 in an OPO at 1064 nm for the first time), key requirements for quantum-enhanced GW detectors, and the propagation of a squeezed state in a complex interferometer and its interaction with the interferometer field were studied. Finally, the experimental demonstration of quantum-enhancement in a prototype GW detector was performed. By injecting a squeezed vacuum field of 9.3 dB (inferred) or 7.4 ± 0.1 dB (measured) at frequencies above 3 kHz and a cutoff frequency for squeezing at 700 Hz into the antisymmetric port of the prototype GW detector in a signal-recycled Michelson interferometer configuration, the shot noise floor of the detector was reduced broadband from 7.0 x 10-7 m/viH- to 5.0 x 10-17 m/V/H while the strength of a simulated GW signal was retained, resulting in a 40% increase in signal-to-noise ratio or detector sensitivity, which is equivalent to a factor of 1.43 = 2.7 increase in GW detection rate for isotropically distributed GW sources that are confined to the frequency band in which squeezing was effective. This is the first implementation of quantum-enhancement in a prototype GW detector with suspended optics and readout and control schemes similar to those used in LIGO and Advanced LIGO. It is, therefore, a critical step toward implementation of quantum-enhancement in long baseline GW detectors.
by Keisuke Goda.
Ph.D.
Carolan, Thomas Andrew. "Acoustic emission detection by fibre optic interferometry." Thesis, Heriot-Watt University, 1994. http://hdl.handle.net/10399/1419.
Повний текст джерелаZhu, Yunlong. "Exploration of Interferometric Detection Methods based on Continuous Phase Modulation." Thesis, Troyes, 2018. http://www.theses.fr/2018TROY0024.
Повний текст джерелаIn this thesis, interference signals with continuous phase modulations are theoretically and experimentally analyzed in order to develop cost-efficient solutions for sensing application in mechanics and optics.Several common phase modulation functions and phase retrieval algorithms are presented. We mainly focus on sinusoidal phase modulation (SPM), which is especially attractive for the most accessible modulators (e.g. electro-optical or piezoelectrical modulators). In such case, the demodulation process must handle synchronization issue as well as a possible intensity modulation induced by the SPM. Mathematical solutions are proposed in this context. These demodulation techniques are then applied to three experimental devices developed during this thesis. First of all, a lens-less co-axis digital holography setup has been built, and SPM has been applied for imaging and displacement measurement. Then we use a dual-frequency modulation technique to perform two-dimensional deformation field measurements using an original ESPI (Electronic Speckle Pattern Interferometry) device. This approach allows for simultaneous measurement of the displacement along two different axes using a single laser and a single camera. Finally, we present a compact SPR (Surface Plasmon Resonance) instrument implementing SPM interferometric detection through wavelength modulation, where the amplitude modulation is successfully taken into account
Nuñez, P. D., N. J. Scott, B. Mennesson, O. Absil, J. C. Augereau, G. Bryden, Brummelaar T. ten, et al. "A near-infrared interferometric survey of debris-disc stars." EDP SCIENCES S A, 2017. http://hdl.handle.net/10150/626407.
Повний текст джерелаMcNamara, Paul William. "Development of optical techniques for space-borne laser interferometric gravitational wave detectors." Thesis, University of Glasgow, 1998. http://theses.gla.ac.uk/8477/.
Повний текст джерелаSchütte, Dirk [Verfasser]. "Modern control approaches for next-generation interferometric gravitational wave detectors / Dirk Schütte." Hannover : Technische Informationsbibliothek (TIB), 2016. http://d-nb.info/1118739361/34.
Повний текст джерелаPalmer, David Andrew. "Modelling and control of suspensions as used in interferometric gravitational wave detectors." Thesis, University of Glasgow, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.394956.
Повний текст джерелаGreen, Anna Catriona. "When light gets pushy : radiation pressure effects in interferometric gravitational wave detectors." Thesis, University of Birmingham, 2018. http://etheses.bham.ac.uk//id/eprint/8512/.
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