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Dissertations / Theses on the topic 'Fiber'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

MURA, EMANUELE. "PHOPSHATE OPTICAL FIBERS FOR IR FIBER LASERS." Doctoral thesis, Politecnico di Torino, 2014. http://hdl.handle.net/11583/2544536.

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2

Paye, Corey. "An Analysis of W-fibers and W-type Fiber Polarizers." Thesis, Virginia Tech, 2001. http://hdl.handle.net/10919/32474.

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Optical fibers provide the means for transmitting large amounts of data from one place to another and are used in high precision sensors. It is important to have a good understanding of the fundamental properties of these devices to continue to improve their applications. A specially type of optical fiber known as a W-fiber has some desirable properties and unique characteristics not found in matched-cladding fibers. A properly designed W- fiber supports a fundamental mode with a finite cutoff wavelength. At discrete wavelengths longer than cutoff, the fundamental mode experiences large amount

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3

Polley, Arup. "High performance multimode fiber systems a comprehensive approach /." Diss., Atlanta, Ga. : Georgia Institute of Technology, 2008. http://hdl.handle.net/1853/31699.

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Thesis (Ph.D)--Electrical and Computer Engineering, Georgia Institute of Technology, 2009.<br>Committee Chair: Ralph, Stephen; Committee Member: Barry, John; Committee Member: Chang, G. K.; Committee Member: Cressler, John D.; Committee Member: Trebino. Part of the SMARTech Electronic Thesis and Dissertation Collection.

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4

Rugeland, Patrik. "Applications of monolithic fiber interferometers and actively controlled fibers." Doctoral thesis, KTH, Laserfysik, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-118750.

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The objective of this thesis was to develop applications of monolithic fiber devices and actively controlled fibers. A special twin-core fiber known as a ‘Gemini’ fiber was used to construct equal arm-length fiber interferometers, impervious to temperature and mechanical perturbations. A broadband add/drop multiplexer was constructed by inscribing fiber Bragg gratings in the arms of a Gemini Mach-Zehnder interferometer. A broadband interferometric nanosecond switch was constructed from a micro-structured Gemini fiber with incorporated metal electrodes. Additionally, a Michelson fiber interfero

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5

Richmond, Eric William. "Birefringent single-arm fiber optic enthalpimeter for catalytic reaction monitoring." Diss., This resource online, 1990. http://scholar.lib.vt.edu/theses/available/etd-07282008-135248/.

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6

Jollivet, Clemence. "Specialty Fiber Lasers and Novel Fiber Devices." Doctoral diss., University of Central Florida, 2014. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/6295.

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At the Dawn of the 21st century, the field of specialty optical fibers experienced a scientific revolution with the introduction of the stack-and-draw technique, a multi-steps and advanced fiber fabrication method, which enabled the creation of well-controlled micro-structured designs. Since then, an extremely wide variety of finely tuned fiber structures have been demonstrated including novel materials and novel designs. As the complexity of the fiber design increased, highly-controlled fabrication processes became critical. To determine the ability of a novel fiber design to deliver light w

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7

Horvath, A. Elisabet. "The effects of cellulosic fiber charges on polyelectrolyte adsorption and fiber-fiber interactions." Doctoral thesis, Stockholm : Department of Fibre and Polymer Technology, Royal Institute of Technology, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-4158.

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8

Kuhlmey, Boris T. "Theoretical and numerical investigation of the physics of microstructured optical fibres." Connect to full text, 2004. http://setis.library.usyd.edu.au/adt/public_html/adt-NU/public/adt-NU20040715.171105.

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Thesis (Ph. D.)--School of Physics, Faculty of Science, University of Sydney, 2004. (In conjunction with: Université de Droit, d'Économie et des Sciences d'Aix-Marseille (Aix Marseille III)).<br>Bibliography: leaves 196-204.

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9

Snyder, Heidi Ghent. "Fiber type-specific desmin content in human single muscle fibers /." Diss., CLICK HERE for online access, 2006. http://contentdm.lib.byu.edu/ETD/image/etd1253.pdf.

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10

Ghent, Heidi. "Fiber Type-specific Desmin Content in Human Single Muscle Fibers." BYU ScholarsArchive, 2006. https://scholarsarchive.byu.edu/etd/381.

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Contractile and cytoskeletal protein concentrations have been shown to differ on the basis of fiber type in whole muscle homogenates. The purpose of this study was to compare the content of the intermediate filament protein, desmin, between type I and type IIa single muscle fibers from a mixed muscle in human subjects. Biopsies were taken from the vastus lateralis of six recreationally active males. Approximately 150 single muscle fibers were dissected from each sample and analyzed using SDS-PAGE to determine myosin heavy chain (MHC) composition. Following identification, muscle fibers were po

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11

Hartley, William H. "High-Speed Imaging of Polymer Induced Fiber Flocculation." Thesis, Georgia Institute of Technology, 2007. http://hdl.handle.net/1853/14627.

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This study presents quantitative results on the effect on individual fiber length during fiber flocculation. Flocculation was induced by a cationic polyacrylamide (cPAM). A high speed camera recorded 25 second video clips. The videos were image-analyzed and the fiber length and the amount of fiber in each sample were measured. Prior to the flocculation process, fibers were fractionated into short and long fibers. Trials were conducted using the unfractionated fiber, short fiber, and long fiber. The short and long fibers were mixed in several trials to study the effect of fiber length. T

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12

Srinivas, K. T. "Axial strain effects on optical fiber mode patterns." Thesis, This resource online, 1987. http://scholar.lib.vt.edu/theses/available/etd-04122010-083554/.

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13

Wern, Chien Wei. "Fiber and fiber-matrix interface effects on the orthogonal cutting of fiber reinforced plastics /." Thesis, Connect to this title online; UW restricted, 1995. http://hdl.handle.net/1773/7133.

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14

Ratu, Ricky Novry. "Development of polypropylene fiber as concrete reinforcing fiber." Thesis, University of British Columbia, 2016. http://hdl.handle.net/2429/57779.

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The objective of this research is to produce polypropylene fibers with improved interface bonding with a concrete matrix. The Laboratory Mixing Extruder paired with the Randcastle fiberline drawing device was used for producing fiber from polypropylene (PP) chips. A target diameter of 0.5 mm fiber was obtained from a 2-stage process in the production line. The effort to improve the fiber surface by applying aluminum oxide sol-gel coating was unsatisfactory due to the failure of the coating materials to adhere to the fiber. Incorporating silica fume (SF) powder in the fiber extrusion process en

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15

Fernberg, Patrik. "Fiber bridging concepts applied to short fiber composites." Licentiate thesis, Luleå tekniska universitet, 2000. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-18743.

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Polymer composite materials are in wide-spread use in the transportation industry. In aerospace industry the use these materials are established while in automotive industry the interest is increasing. The attention of automotive industry is to a great deal focused on various kinds of molded composites such as glass mat reinforced thermoplastics (GMT) and sheet molding compound (SMC). Their interest is to a large extent driven by the possibility to manufacture components of complex geometry in a cost- efficient process with these materials. An increasing number of car and truck manufacturers a

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16

Smith, Kevin H. "In-fiber Optical Devices Based on D-fiber." BYU ScholarsArchive, 2005. https://scholarsarchive.byu.edu/etd/291.

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This dissertation presents the fabrication and analysis of in-fiber devices based on elliptical core D-shaped optical fiber. Devices created inside optical fibers are attractive for a variety of reasons including low loss, high efficiency, self-alignment, light weight, multiplexibility, and resistance to electromagnetic interference. This work details how D-fiber can be used as a platform for a variety of devices and describes the creation and performance of two of these devices: an in-fiber polymer waveguide and a surface relief fiber Bragg grating. In D-fiber the core is very close to the fl

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17

Scott, David Edward. "Characterization of fibrillated polypropylene and recycled waste fiber reinforced concrete." Thesis, Georgia Institute of Technology, 1992. http://hdl.handle.net/1853/19543.

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18

Washburn, Brian Richard. "Dispersion and nonlinearities associated with supercontinuum generation in microstructure fibers." Diss., Georgia Institute of Technology, 2002. http://hdl.handle.net/1853/30964.

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19

Heisey, Cheryl L. "Adhesion of novel high performance polymers to carbon fibers : fiber surface treatment, characterization, and microbond single fiber pull-out test /." Diss., This resource online, 1993. http://scholar.lib.vt.edu/theses/available/etd-02052007-081244/.

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20

Сад, Альона Юріївна. "Optical fiber." Thesis, Київський національний університет технологій та дизайну, 2017. https://er.knutd.edu.ua/handle/123456789/7391.

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21

Misner, Scottie. "Dietary Fiber." College of Agriculture and Life Sciences, University of Arizona (Tucson, AZ), 2006. http://hdl.handle.net/10150/146440.

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2 pp.<br>Even dietary fiber is not considered a nutrient, health professionals agree that most Americans don't get nearly enough in their diet. So, why is fiber important? what does fiber do? This article answers the questions regarding diet fiber by providing information on the practical aspects of fiber in the diet as well as food sources and their dietary fiber content.

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22

Misner, Scottie, Evelyn Whitmer, and Traci Armstrong Florian. "Dietary Fiber." College of Agriculture and Life Sciences, University of Arizona (Tucson, AZ), 2013. http://hdl.handle.net/10150/298146.

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23

Borodulina, Svetlana. "Micromechanics of Fiber Networks." Doctoral thesis, KTH, Hållfasthetslära (Inst.), 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-188481.

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The current trends in papermaking involve, but are not limited to, maintaining the dry strength of paper material at a reduced cost. Since any small changes in the process affect several factors at once, it is difficult to relate the exact impact of these changes promptly. Hence, the detailed models of the network level of a dry sheet have to be studied extensively in order to attain the infinitesimal changes in the final product. In Paper A, we have investigated a relation between micromechanical processes and the stress–strain curve of a dry fiber network during tensile loading. The impact o

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24

Robinson, Risa J. "Polarization modulation and splicing techniques for stressed birefringent fiber /." Online version of thesis, 1995. http://hdl.handle.net/1850/12228.

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25

Wang, Xiaozhen. "Characterization of Fiber Tapers for Fiber Devices and Sensors." Thèse, Université d'Ottawa / University of Ottawa, 2012. http://hdl.handle.net/10393/23330.

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Fiber tapers have attracted much attention and have been successfully employed in various applications, ranging from resonators, filters, interferometers to sensors. This thesis studies the properties of fiber tapers for the purpose of making tapered-based devices and sensors in aerospace related application where small size and light weight are critical. This thesis includes theoretical derivation and experimental verifications of distributed mode coupling in tapered single-mode fibers (SMFs) with high-resolution optical frequency-domain reflectometry (OFDR) technique. The studies are realize

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26

Wang, Long. "Fiber Based Mode Locked Fiber Laser Using Kerr Effect." University of Dayton / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1454081445.

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27

Suzuki, Shigeru. "Optical Fiber Devices: Novel Fiber Lasers and Image Amplifier." Diss., The University of Arizona, 2008. http://hdl.handle.net/10150/194910.

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Three fiber based optical devices: all phosphate glass fiber laser, single hybrid mode fiber laser, and fiber image amplifier, were investigated in this dissertation. Phosphate fiber Bragg grating (FBG) is desired to improve performance of recently developed high power single frequency lasers that were based on highly rare earth ion doped phosphate fibers because these lasers were fabricated with silica FBGs that have incompatible properties with standard phosphate glasses. Since standard phosphate glasses are not photosensitive, Ge-doped phosphate glasses were fabricated and their UV-photosen

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28

Kominsky, Daniel. "Development of Random Hole Optical Fiber and Crucible Technique Optical Fibers." Diss., Virginia Tech, 2005. http://hdl.handle.net/10919/28949.

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This dissertation reports the development of two new categories of optical fibers. These are the Random Hole Optical Fiber (RHOF) and the Crucible Technique Hybrid Fiber (CTF). The RHOF is a new class of microstructure fiber which possesses air holes which vary in diameter and location along the length of the fiber. Unlike all prior microstructure fibers, these RHOF do not have continuous air holes which extend throughout the fiber. The CTF is a method for incorporating glasses with vastly differing thermal properties into a single optical fiber. Each of these two classes of fiber brings

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29

Cassino, Christopher Daniel. "Detection of fiber fracture in Unidirectional Fiber Reinforced Composites using an In-Plane Fiber Optic Sensor." Thesis, Virginia Tech, 2002. http://hdl.handle.net/10919/32419.

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Fiber reinforced polymers (FRP) are an efficient and inexpensive method of repairing deteriorating infrastructure. FRP sheets can be applied to spalling bridge sections and columns to prevent further deterioration and increase stiffness. However, the effect of the environment on the long-term durability of FRP and how the various damage mechanisms initiate and develop are not known. Systems for structural health monitoring are being sought as a means of managing important components in transportation systems as assets in light of modern life cycle cost concepts. This study characterizes a fibe

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30

Hofmann, John. "Extension of the Method of Ellipses to Determining the Orientation of Long, Semi-flexible Fibers in Model 2- and 3-dimensional Geometries." Diss., Virginia Tech, 2013. http://hdl.handle.net/10919/23921.

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The use of fiber-reinforced polymer composites formed via injection molding is of increasing interest due to their superior mechanical properties as compared to those of the polymer matrix alone. These mechanical properties, however, are strongly dependent on the fiber length and orientation distributions within a molded part. As such, there is a need to understand and model the orientation evolution of chopped fibers in flow in order to accurately simulate the final fiber orientation distribution within injection molded parts. As a result of this, accurate and reliable experimental measuremen

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31

Lyyttkäinen, Katja Johanna. "Control of complex structural geometry in optical fibre drawing /." Connect to full text, 2004. http://setis.library.usyd.edu.au/adt/public_html/adt-NU/public/adt-NU20041011.120247.

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32

Greaves, James David. "Numerical analysis of the outside vapor deposition process." Ohio : Ohio University, 1990. http://www.ohiolink.edu/etd/view.cgi?ohiou1183491109.

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33

Lyytikäinen, Katja Johanna. "Control of complex structural geometry in optical fibre drawing." Connect to full text, 2004. http://hdl.handle.net/2123/597.

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Thesis (Ph. D.)--University of Sydney, 2004.<br>Title from title screen (viewed 14 May 2008). Submitted in fulfilment of the requirements for the degree of Doctor of Philosophy to the School of Physics, Faculty of Science. Includes bibliographical references. Also available in print form.

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34

Sangam, Ramyaa Ramesh. "Development of Polychromatic Laser Beacon Fiber Coupling System Based on Photonic Crystal Fibers." University of Dayton / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1386943018.

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35

Joshi, Ninad Milind. "Study of the Effect of Unidirectional Carbon Fiber in Hybrid Glass Fiber / Carbon Fiber Sandwich Box Beams." University of Dayton / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1386188162.

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36

Holmberg, Patrik. "Laser processing of Silica based glass." Doctoral thesis, KTH, Laserfysik, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-173929.

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The main topic of this thesis work is photosensitivity and photo-structuring of optical fibers and bulk glass. Although research in the field of photosensitivity in glass and optical fibers has been ongoing for more than three decades, the underlying mechanisms are still not well understood. The objective was to gain a better understanding of the photo-response by studying photosensitivity from a thermodynamic perspective, as opposed to established research focusing on point defects and structural changes, and strain and stress in optical fibers. Optical fibers was mainly used for experimental

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37

Borton, Eric K. "Update and comparison of cumulative fiber exposure estimates for workers in a facility expanding Libby vermiculite." University of Cincinnati / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1335461760.

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38

Song, Jiawei, and Jiawei Song. "Nd-doped Fiber Lasers and Fiber Amplifiers at 9xx nm." Thesis, The University of Arizona, 2016. http://hdl.handle.net/10150/620827.

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The lasers operating in the wavelength range of 900 - 1000 nm have caused intense attention because they are in great demands for: 1. Highpower blue and deep UV laser generation 2. High power single-mode pump laser source 3. Light detection and Lidar , etc. And now, there are actually many different types of lasers can generate laser in this wavelength range. For example, Nd and Yb doped fiber laser, Nd and Yb doped glass and crystal lasers, OPO and SHG laser, etc. Among all this options, we decided to study the Nd-doped fiber laser for their outstanding advantages: 1. As fiber laser, it posse

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39

Smulski, Stephen John. "Flexural behavior of a glass fiber reinforced wood fiber composite." Diss., Virginia Polytechnic Institute and State University, 1985. http://hdl.handle.net/10919/53596.

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The static and dynamic flexural properties of a wood fiber matrix internally reinforced with continuous glass fibers were investigated. When modelled as a sandwich composite, the static flexural modulus of elasticity (MOE) of glass fiber reinforced hardboard could be successfully predicted from the static flexural MOE of the wood fiber matrix, and the tensile MOE and effective volume fraction of the glass fiber reinforcement. Under the same assumption, the composite modulus of rupture (MOR) is a function of the reinforcement tensile MOE and effective volume fraction, and the matrix stress at f

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40

Li, Hongying. "Fiber tracking and fiber architecture description in cardiac DT-MRI." Thesis, Lyon, INSA, 2013. http://www.theses.fr/2013ISAL0125.

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La connaissance de l’architecture tridimensionnelle (3D) des fibres est cruciale dans la compréhension de la fonction du cœur humain. L’imagerie par résonance magnétique du tenseur de diffusion (IRM-DT) est une technique permettant de mesurer la diffusion des molécules d’eau dans des tissus humains, et donc d’étudier de manière non-invasive l’architecture 3D des fibres du cœur humain. Dans l’IRM-TD cardiaque, la tractographie des fibres est essentielle pour représenter et visualiser l’architecture des fibres, mais souvent utilisée qualitativement comme une dernière étape qui consiste à visuali

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41

Fierling, Yannick P. H. "Analysis of fiber-reinforced composite plates utilizing curvilinear fiber trajectories." Thesis, This resource online, 1995. http://scholar.lib.vt.edu/theses/available/etd-01312009-063412/.

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42

Derrington, Dolores Cormack. "Overview of fiber optics technology: industrial and military." Thesis, Virginia Tech, 1989. http://hdl.handle.net/10919/43896.

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Fiber optics technology is being used in many applications, both in the military world and in the industrial world. A broad overview of this technology is provided, including a discussion of the fundamentals of fiber operation and component characteristics. Applications of fiber optics in both military and industrial communities is addressed, identifying specific examples in both cases. In addition, market projections and technology trends are discussed for both the military and industrial communities.<br>Master of Science

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43

Lee, Shiao-Chiu. "Axial offset effects upon optical fiber sensor and splice performance." Thesis, Virginia Polytechnic Institute and State University, 1985. http://hdl.handle.net/10919/91128.

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A kind of intensity modulated fiber sensor utilizing axial offset parameter is proposed. The theoretical analysis and experimental characteristics of this sensor are described. All the theoretical results derived in this thesis are based on assuming a uniform power distribution in the fibers. An expression of coupling efficiency of central dipped parabolic graded index fibers due to axial offset is derived. The results show less sensitivity to axial offset for the central dipped fibers than for the parabolic profile fibers without a dip. Expressions of coupling efficiency of graded index fib

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44

Myrén, Niklas. "Poled fiber devices." Doctoral thesis, KTH, Physics, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-262.

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<p>The topic of this thesis is the development of devices for telecom applications based on poled optical fibers. The focus is on a specific function, optical switching/modulation.</p><p>Some of the most important results are summarized below. Optical switching at telecom wavelengths (1.55 μm) is demonstrated in an all-fiber switch based on a fiber with internal electrodes. The fiber is made electro-optically active with a thermal poling process in which a strong electric field is recorded in the glass at a temperature of 255 °C. After poling, the fiber is put in one arm of a Mach-Zehnder inte

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45

Myrén, Niklas. "Poled fiber devices /." Stockholm, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-262.

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46

Bock, Katherine J. "Femtosecond Fiber Lasers." Thèse, Université d'Ottawa / University of Ottawa, 2012. http://hdl.handle.net/10393/23391.

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This thesis focuses on research I have done on ytterbium-doped femtosecond fiber lasers. These lasers operate in the near infrared region, lasing at 1030 nm. This wavelength is particularly important in biomedical applications, which includes but is not limited to confocal microscopy and ablation for surgical incisions. Furthermore, fiber lasers are advantageous compared to solid state lasers in terms of their cost, form factor, and ease of use. Solid state lasers still dominate the market due to their comparatively high energy pulses. High energy pulse generation in fiber lasers is hindered b

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47

Lestoquoy, Guillaume. "Multimaterial fiber electronics." Thesis, Massachusetts Institute of Technology, 2014. http://hdl.handle.net/1721.1/87929.

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Thesis: Ph. D., Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science, 2014.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (pages 119-129).<br>As the number of materials that are thermally-drawable into fibers is rapidly expending, numerous new multimaterial fiber architectures can be envisioned and fabricated. High-melting temperature metals, compound materials, composite, conductive or ferroelectric polymers: the broad diversity of these materials' nature and properties, combined with various post-fabrication treatm

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48

Oblapenko, B. S. "Fiber optic cabling." Thesis, Сумський державний університет, 2012. http://essuir.sumdu.edu.ua/handle/123456789/28545.

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49

Battiato, James Michael 1966. "Fiber Bragg gratings." Diss., The University of Arizona, 1998. http://hdl.handle.net/10150/288905.

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The properties of fiber Bragg gratings are investigated theoretically and experimentally. The effects of experimental parameters on grating characteristics are modeled for both uniform and non-uniform gratings. Particular emphasis is placed on the formation of fiber Bragg gratings tilted at 45 degrees with respect to the fiber axis in single mode fibers. In this case, light is coupled out of the fiber in a surface normal manner. Several fabrication methods for producing tilted fiber gratings are explored and characterized. The most efficient gratings are obtained with a prism coupling techniqu

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50

Jin, Chuhang. "Microstructured Terahertz Fiber." Thesis, KTH, Tillämpad fysik, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-265667.

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