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Tesi sul tema "Beam optics"

Autore: Grafiati

Pubblicato: 4 giugno 2021

Ultima modifica: 1 agosto 2024

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1

McLaughlin, Lisa. "Optical beam control using adaptive optics." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2005. http://library.nps.navy.mil/uhtbin/hyperion/05Dec%5FMcLaughlin.pdf.

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Thesis (M.S. in Astronautical Engineering)--Naval Postgraduate School, December 2005.<br>Thesis Advisor(s): Brij Agrawal, Ty Martinez. Includes bibliographical references (p. 75-76). Also available online.

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2

Corley, Melissa S. "Maritime adaptive optics beam control." Monterey, California. Naval Postgraduate School, 2010. http://hdl.handle.net/10945/10559.

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The Navy is interested in developing systems for horizontal, near ocean surface, high-energy laser propagation through the atmosphere. Laser propagation in the maritime environment requires adaptive optics control of aberrations caused by atmospheric distortion. In this research, a multichannel transverse adaptive filter is formulated in Matlab's Simulink environment and compared to a complex lattice filter that has previously been implemented in large system simulations. The adaptive filters are used to augment a classical adaptive optics controller and are also compared to a Kalman filt

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3

Münnich, Matthias. "Beam Deflection." Master's thesis, University of Central Florida, 2013. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/5823.

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In order to fully understand the third order nonlinear optical response of materials under high irradiance excitation it is necessary to study the temporal and polarization dependence of nonlinear refraction and absorption. There are several existing approaches such as Z-scan and pump-probe techniques to determine those responses. As part of this work, these approaches will be briefly outlined before presenting beam deflection, applied from photothermal beam deflection, as an alternative experimental technique to determine the nonlinear refraction with its temporal and polarization dynam

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4

Evans, Jonathan W. "Beam Switching of an Nd:YAG Laser Using Domain Engineered Prisms in Magnesium Oxide Doped Congruent Lithium Niobate." University of Dayton / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1281366442.

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5

Eckhardt, Stephen Karl. "Beam propagation and shift-variant optics." Diss., The University of Arizona, 1990. http://hdl.handle.net/10150/185110.

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The goal of the research described in this dissertation is to be able to model propagation of light through shift-variant optics. Shift-variant optical elements have a point spread function which is a function of the transverse coordinates. This shift-variance can be caused by aberration or by the first order properties of the optical system. In this work the latter is emphasized. Specifically, this dissertation discusses propagation through lenses and prisms and between tilted planes or a plane and a spherical surface. Extension to other types of shift-variant optical elements is possible. Tw

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6

李銘 and Ming Li. "Optical studies of a slow-position beam." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1995. http://hub.hku.hk/bib/B31213364.

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7

Li, Ming. "Optical studies of a slow-position beam /." Hong Kong : University of Hong Kong, 1995. http://sunzi.lib.hku.hk/hkuto/record.jsp?B17310970.

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8

Penner, Robert Scott. "Focusing, wavelength tuning, beam steering and beam shaping of circular grating surface emitting distributed Bragg reflector lasers." Diss., The University of Arizona, 1999. http://hdl.handle.net/10150/284042.

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Over the past decade, circular grating surface emitting DBR lasers (CGSELs) have progressed from theory to reality. These devices possess several properties that make them attractive options for such applications as optical interconnects and laser arrays. These advantages include low divergence angles, circular beam profiles, and high power output. In this dissertation, the addition of new functionality to these lasers including wavelength tunability, focusing, beam steering and beam shaping is investigated. The theory governing device operation is presented. Pertinent discussions include the

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9

Porembski, Joseph Paul. "Optical Beam Steering using a MEMS-driven White Cell." The Ohio State University, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=osu1267553518.

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10

Mourka, Areti. "Probing the modal characteristics of novel beam shapes." Thesis, University of St Andrews, 2014. http://hdl.handle.net/10023/4287.

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In this thesis, an investigation into the modal characteristics of novel beam shapes is presented. Sculpting the phase profile of a Gaussian beam can result in the generation of a beam with unique properties. Described in this thesis are Laguerre-Gaussian (LG), Hermite-Gaussian (HG) and Bessel beams (BBs). The diffraction of LG beam modes from a triangular aperture is explored and this effect can be used for the efficient measurement of the azimuthal mode index l that indicates the number of multiples of 2π of phase changes that the field displays around one circumference of the optical axis.

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11

Mokhov, Sergiy V. "Theoretical study of beam transformations by volume diffraction." Doctoral diss., University of Central Florida, 2011. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/4986.

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Laser beams can be manipulated by volume diffractive elements in addition to conventional optical elements like mirrors, lenses, and beam splitters. Conventional optical elements can be described by applying the basic laws of reflection and refraction at the surfaces of the elements. Even diffraction by surface gratings utilizes relatively simple mathematics. This is to be contrasted with the volume diffraction, which requires coupled wave theory in the slowly varying envelope approximation (SVEA) to obtain accurate results. Efficient spatially distributed diffraction of laser beams is possibl

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12

Zhang, Shuyan. "Spatial beam shaping of high-power ultrashort laser pulses." W&M ScholarWorks, 2007. https://scholarworks.wm.edu/etd/1539623522.

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This thesis presents both theoretical and experimental studies of a diffractive beam shaping system for ultrashort high-power laser pulses.;A theoretical model is developed to simulate the reshaped intensity profiles for a 100-fs pulse with various energy levels. Both temporal evolution and spatial intensity distribution of the pulse at the target plane of the beam shaping system are calculated. Numerical simulation shows that after passing through the beam shaping system, the pulse front is significantly curved due to the propagation time delay, and the pulse duration time through the target

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13

Tovar, Anthony A. "Beam Modes of Lasers with Misaligned Complex Optical Elements." PDXScholar, 1995. https://pdxscholar.library.pdx.edu/open_access_etds/1363.

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A recurring theme in my research is that mathematical matrix methods may be used in a wide variety of physics and engineering applications. Transfer matrix techniques are conceptually and mathematically simple, and they encourage a systems approach. Once one is familiar with one transfer matrix method, it is straightforward to learn another, even if it is from a completely different branch of science. Thus it is useful to overview these methods, and this has been done here. Of special interest are the applications of these methods to laser optics, and matrix theorems concerning multipass optic

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14

Chen, Hongwei. "Optical Beam Scanning Using Potassium Tantalate Niobate." University of Dayton / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1444868170.

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15

Blanco, Sonia GarciÌa. "Electron-beam modification of silica for integrated optics." Thesis, University of Glasgow, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.272890.

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16

Rafayelyan, Mushegh. "Singular beam shaping from spin-orbit flat optics." Thesis, Bordeaux, 2017. http://www.theses.fr/2017BORD0583/document.

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Dans ce travail nous avons résolu deux problèmes principaux de la mise en forme topologique de faisceau paraxial pour les composants plans : la modalité et le polychromatisme.Nous les résolvons en introduisant de nouveaux concepts d’éléments optiques à interaction spin orbite,à savoir la “q-plate modale” et la “q-plate Bragg-Berry”. D’un côté, la q-plate modale convertit un faisceau gaussien incident en un faisceau de Laguerre-Gauss pour un indice radial et un indice d’azimut donnés, ce qui par conséquent dépasse les capacités des q-plates conventionnelles qui ne modifient que le degré de libe

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17

Morris, Jill E. "Studies of novel beam shapes and applications to optical manipulation." Thesis, University of St Andrews, 2010. http://hdl.handle.net/10023/1699.

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In this thesis an investigation into novel beams and optical manipulation is presented. Sculpting the phase profile of a Gaussian beam can result in the generation of a beam with unusual properties. Described in this thesis are optical vortices, Bessel beams and Airy beams. Additionally, optical manipulation was investigated using both novel beams and Gaussian beams with an emphasis on the use of a broad bandwidth laser source. The generation of multiple broadband optical trap sites was explored, and the transfer of orbital angular momentum from a broadband optical vortex to trapped microspher

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18

Sudradjat, Faisal. "50%-50% Beam Splitters Using Transparent Substrates Coated by Single- or Double-Layer Quarter-Wave Thin Films." ScholarWorks@UNO, 2006. http://scholarworks.uno.edu/td/376.

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A pair of light beams that have orthogonal polarizations and equal intensity can be generated through reflection and refraction of a monochromatic light at a dielectric surface. Sytematic procedures to design beam splitters which can produce such output light beams are described in this thesis. Two designs that are of particular interest are prismatic substrates coated by a single layer and a double layer of thin films. Specific examples of each beam splitter in the visible and infrared are included. The performance of each beam splitter as a function of incidence angle, film thicknes

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19

Barcík, Peter. "Rozložení relativní variance optické intenzity ve svazcích." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2012. http://www.nusl.cz/ntk/nusl-219880.

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This master´s thesis provides basic properties and measurement of optical beams. In the first chapter is shown division of light on ray, wave and beam optics. Atmospheric optics and properties associated with propagation of light through the earth's atmosphere is presented in the second chapter. In the third part are shown basic techniques for Gaussian beam shaping. The last chapter deals with measurement of optical beam after propagating through a turbulent medium. In this section is shown distribution of relative variance of optical intensity in Gaussian and Top-Hat beam. There is also measu

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20

Mart, Cody W. "Characterization and Power Scaling of Beam-Combinable Ytterbium-Doped Microstructured Fiber Amplifier." Thesis, The University of Arizona, 2017. http://pqdtopen.proquest.com/#viewpdf?dispub=10621184.

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<p> In this dissertation, high-power ytterbium-doped fiber amplifiers designed with advanced waveguide concepts are characterized and power scaled. Fiber waveguides utilizing cladding microstructures to achieve wave guidance via the photonic bandgap (PBG) effect and a combination of PBG and modified total internal reflection (MTIR) have been proposed as viable single-mode waveguides. Such novel structures allow larger core diameters (>35 ?m diameters) than conventional step-index fibers while still maintaining near-diffraction limited beam quality. These microstructured fibers are demonstrated

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21

Rosenbusch, Peter. "Atom optics with an adaptable magnetic reflector." Thesis, University of Sussex, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.341516.

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22

Watkins, R. Joseph. "The adaptive control of optical beam jitter." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2004. http://library.nps.navy.mil/uhtbin/hyperion/04Dec%5FWatkins%5FPhD.pdf.

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Thesis (Ph. D. in Mechanical Engineering)--Naval Postgraduate School, December 2004.<br>Thesis advisor(s): Brij N. Agrawal, Young S. Shin. Includes bibliographical references (p. 163-165). Also available online.

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23

RIOS, PAULO B. "Linha de transporte de feixe do acelerador microtron do IFUSP." reponame:Repositório Institucional do IPEN, 2002. http://repositorio.ipen.br:8080/xmlui/handle/123456789/11064.

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Made available in DSpace on 2014-10-09T12:47:43Z (GMT). No. of bitstreams: 0<br>Made available in DSpace on 2014-10-09T14:10:27Z (GMT). No. of bitstreams: 1 08347.pdf: 3195632 bytes, checksum: 315dd33e8ef379364634f9993e972f7d (MD5)<br>Dissertacao (Mestrado)<br>IPEN/D<br>Instituto de Pesquisas Energeticas e Nucleares - IPEN/CNEN-SP

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24

Tsampoula, Xanthi. "Femtosecond cellular transfection using novel laser beam geometries." Thesis, St Andrews, 2009. http://hdl.handle.net/10023/909.

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25

Shaklan, Stuart Bruce. "Multiple beam correlation using single-mode fiber optics with application to interferometric imaging." Diss., The University of Arizona, 1989. http://hdl.handle.net/10150/184827.

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Abstract (sommario):

A study of the application of single-mode fiber optics to the multiple-beam interferometric recombination problem is presented. In the laboratory, the fibers have been used in wide bandwidth, two-arm, Mach-Zehnder test interferometers as well as a 5-telescope imaging interferometer connected to an all-fiber beam combiner. Based upon these experiments and some theoretical studies it is shown that fiber optics and fiber optic components such as directional couplers provide an excellent alternative to conventional optics such as mirrors, beamsplitters, and relay lenses. The equations describing t

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26

Horger, John. "Multiple plane wave analysis of acousto-optic diffraction of Gaussian shaped light beams." Thesis, Virginia Tech, 1987. http://hdl.handle.net/10919/44053.

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A short history of acousto-optics research is presented along with a general description of how light and sound interact. <p>The Multiple Scattering model is derived and used with a Gaussian light beam to observe the distortion in light beam profile within the sound field. Numerical results are presented for comparison to previous studies using thick holograms and two orders of light. The results from using two light orders are compared to four light order results. <p>A Hamming sound amplitude distribution is introduced as a possible way to reduce the amount of light beam profile di

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27

Sparkes, Martin. "Automatic COâ†2 laser beam alignment systems." Thesis, University of Liverpool, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.263766.

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28

Rivera, Michael 1968. "Bent waveguide analysis with a modified version of the beam propagation method." Diss., The University of Arizona, 1996. http://hdl.handle.net/10150/282158.

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To study propagation in bent waveguides numerically the most common technique used is the Beam Propagation Method (BPM), with either the split-step procedure and Fast Fourier Transform algorithm, or a finite difference approach. Most versions are based on a first order modification of the permittivity profile for scalar or full vector wave equations. Others are based on a longitudinally variant index profile and wide angle beam propagation techniques. New device applications are well beyond the limitations of the present numerical approaches. An example of these applications are polymer and se

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29

Victor, Brian M. "Custom Beam Shaping for High-Power Fiber Laser Welding." The Ohio State University, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=osu1238014676.

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30

Zhao, Hongyan. "A theoretical and experimental study of the optical forces from a laser beam /." Thesis, McGill University, 1991. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=61216.

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A practical geometric optics method for derivation of the optical forces from light rays was described. By this method, the forces from a G.P.W. (Gaussian Plane Wave) and a general TEM$ sb infty$ laser beam were calculated and studied. For a G.P.W. beam, there were two forces which acted on small particles located inside the electromagnetic field; one, called the scattering force, directed in the beam propagation direction, pushed particles axially. The other, called the gradient force, due to the non-uniformity of the electromagnetic field, acted like an optical well and confined the particle

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31

Hastings, Jeffrey Todd 1975. "Nanometer-precision electron-beam lithography with applications in integrated optics." Thesis, Massachusetts Institute of Technology, 2003. http://hdl.handle.net/1721.1/29949.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2003.<br>Includes bibliographical references (p. 179-185).<br>Scanning electron-beam lithography (SEBL) provides sub-10-nm resolution and arbitrary-pattern generation; however, SEBL's pattern-placement accuracy remains inadequate for future integrated-circuits and integrated-optical devices. Environmental disturbances, system imperfections, charging, and a variety of other factors contribute to pattern-placement inaccuracy. To overcome these limitations, spatial-phase locked electron-b

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32

Cheng, Wen. "Optical Vortex Beams: Generation, Propagation and Applications." University of Dayton / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1375370902.

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33

LaPean, James William. "Beam scanning offset Casegrain reflector antennas by subreflector movement." Thesis, This resource online, 1993. http://scholar.lib.vt.edu/theses/available/etd-06302009-040304/.

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34

Dicaire, Marie-Claude. "Generation of Vortex Beam Superpositions Using Angular Gratings." Thesis, Université d'Ottawa / University of Ottawa, 2017. http://hdl.handle.net/10393/35999.

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Beams of light carrying orbital angular momentum, such as vortex beams, have many applications in imaging and micromanipulation. We focus on applications in communication, in particular for quantum key distribution, where the security of communication channels is enhanced with the laws of quantum mechanics. However, this procedure requires superpositions of vortex beams. We want to generate such beams using integrated optics components due to their small size and their advantages in scalability and stability. Angular gratings, which are ring resonators with an embedded Bragg grating, are inte

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35

胡一帆 and Yifan Hu. "Improvement in positron beam optics and some positron beam studies of GaN and Amorphous-si:H thin films." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2000. http://hub.hku.hk/bib/B4257559X.

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36

Hu, Yifan. "Improvement in positron beam optics and some positron beam studies of GaN and Amorphous-si:H thin films." Click to view the E-thesis via HKUTO, 2000. http://sunzi.lib.hku.hk/hkuto/record/B4257559X.

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37

Petersson, L. E. Rickard. "Analysis of two problems related to a focused beam measurement system." Diss., Georgia Institute of Technology, 2002. http://hdl.handle.net/1853/13545.

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38

Fisher, Shari Powell. "Fabrication of advanced optical devices by molecular beam deposition." Thesis, Heriot-Watt University, 1992. http://hdl.handle.net/10399/808.

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39

McClelland, Toby Edward. "Beam coupling and space-charge waves in photorefractive materials." Thesis, University of Kent, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.309780.

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40

Said, Ali A. (Ali Ahmad). "Development and Application of a Nonlinear Optical Characterization Technique." Thesis, University of North Texas, 1991. https://digital.library.unt.edu/ark:/67531/metadc332709/.

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This dissertation reports a sensitive single beam experimental technique for measuring nonlinear refraction and nonlinear absorption in a wide variety of materials. The experimental setup is described and a comprehensive theoretical analysis including cases where nonlinear refraction and nonlinear absorption are also presented.

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41

Han, Wei. "Transmissive beam steering through Electrowetting Microprism arrays." University of Dayton / OhioLINK, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1262130475.

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42

Ament, Craig A. "High numerical aperture axial and transverse beam shaping using diffractive optics." Honors in the Major Thesis, University of Central Florida, 2010. http://digital.library.ucf.edu/cdm/ref/collection/ETH/id/1348.

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This item is only available in print in the UCF Libraries. If this is your Honors Thesis, you can help us make it available online for use by researchers around the world by following the instructions on the distribution consent form at http://library.ucf.edu/Systems/DigitalInitiatives/DigitalCollections/InternetDistributionConsentAgreementForm.pdf You may also contact the project coordinator, Kerri Bottorff, at kerri.bottorff@ucf.edu for more information.<br>Bachelors<br>Sciences<br>Physics

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43

Taylor, Laurence Charles. "A beam tracing model for electromagnetic scattering by atmospheric ice crystals." Thesis, University of Hertfordshire, 2016. http://hdl.handle.net/2299/17645.

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While exact methods, such as DDA or T-matrix, can be applied to particles withsizes comparable to the wavelength, computational demands mean that they are size limited. For particles much larger than the wavelength, the Geometric Optics approximation can be employed, but in doing so wave effects, such as interference and diffraction, are ignored. In between these two size extremes there exists a need for computational techniques which are capable of handling the wide array of ice crystal shapes and sizes that are observed in cirrus clouds. The Beam Tracing model developed within this project m

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44

Morgan, Rhonda Michelle. "Achromatic nulling beam combiner for the detection of extrasolar planets." Diss., The University of Arizona, 2001. http://hdl.handle.net/10150/279844.

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Nulling stellar interferometry may enable the discovery of earth-like planets around other stars. In nulling mode, the zero order fringe is destructive and on axis, thus canceling light from a bright source and detecting dimer off-axis features. To create deep on-axis nulls, the phase must be shifted half a wave achromatically over a broad band. The phase shift is created by adding optical path thickness with dielectric plates. Plates of different materials can balance dispersion. The nulling solutions found for TPF (infrared) and for SIM (visible) are promising. This dissertation describes th

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45

Werntz, Paul C. "A high gain tri-reflector antenna configuration for beam scanning." Diss., This resource online, 1993. http://scholar.lib.vt.edu/theses/available/etd-07112007-092852/.

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46

Jiang, Miao. "DESIGNS AND APPLICATIONS OF PLASMONIC METAMASKS FOR TOPOLOGICAL DEFECT ENGINEERING AND MANUFACTURING OF PANCHARATNAM FLAT OPTICAL ELEMENTS." Kent State University / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=kent1533742796947775.

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47

Kudjoe, John. "Design and development of field emission electron columns with variable beam energy." Thesis, University of York, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.259834.

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48

Furness, Charles Zachary. "Parameter identification of a flexible beam using a modal domain optical fiber sensor." Thesis, Virginia Tech, 1990. http://hdl.handle.net/10919/42058.

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<p>An optical fiber sensor is used for identification of a cantilevered beam under conditions of various concentrated mass loadings. A model of the sensor as well as the dynamic system is developed and used to test the reliability of the identification. Input/output data from an experiment is gathered and used in the identification. A survey of the existing areas of damage detection and parameter identification is included, along with suggestions for incorporating fiber optic sensors into existing techniques. The goal of this research was to show that the fiber sensor can be used for identific

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49

Rubenstein, Richard Alan 1971. "Longitudinal atom optics : measuring the density matrix of a matter wave beam." Thesis, Massachusetts Institute of Technology, 1999. http://hdl.handle.net/1721.1/85255.

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50

Manfrinato, Vitor Riseti. "Electron-beam lithography towards the atomic scale and applications to nano-optics." Thesis, Massachusetts Institute of Technology, 2015. http://hdl.handle.net/1721.1/101466.

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Thesis: Ph. D., Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science, 2015.<br>This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.<br>Cataloged from student-submitted PDF version of thesis.<br>Includes bibliographical references (pages 146-163).<br>Electron-beam lithography (EBL) is a high-resolution pattern generation technique widely used in research and development. However, EBL resolution has been limited to 4 nm isolated features and 16 nm periodic str

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