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Dissertations / Theses on the topic 'Laser stabilization'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Kwee, Patrick. "Laser characterization and stabilization for precision interferometry." Hannover Technische Informationsbibliothek und Universitätsbibliothek Hannover, 2010. http://d-nb.info/1000893626/34.

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2

Pugla, Sarika. "Ultrastable high finesse cavities for laser frequency stabilization." Thesis, Imperial College London, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.490789.

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Lasers with stability of the order of 10.15 or more form the basis of frequency metrology and several other experiments including gravitational wave detection, high-precision spectroscopy and tests of relativity. This thesis describes the frequency stabilization of 1064nm, Nd:YAG lasers to ultra-stable, high finesse Fabry-Perot cavities using the PoundDrever- Halliocking scheme. These lasers will be used as flywheel oscillators for optical atomic clocks. The first part of this thesis describes the design and development of a stable laser using a cryogenic, all-sapphire, high finesse Fabry-Pero

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3

Sievers, Charles A. (Charles Anders) 1979. "Frequency stabilization for a 486nm dye-ring laser." Thesis, Massachusetts Institute of Technology, 2004. http://hdl.handle.net/1721.1/32754.

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Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Physics, 2004.<br>Includes bibliographical references (p. 43).<br>For my thesis, I worked towards using two reference cavities to provide frequency stabilization to a 486nm dye-ring laser. After a doubling cavity doubles the frequency to 243nm, the laser beam is used to excite ground state hydrogen to the 2S state: the first step of an experiment to accurately measure the 2S-NS transitions of hydrogen and measure the Lamb shift and Rydberg's constant. Two stabilization cavities were used to prevent the frequency from drifting and t

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4

Abu-Taha, M. I. A. "Optoacoustic frequency stabilization of a carbon dioxide laser." Thesis, Keele University, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.377921.

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5

Kwee, Patrick [Verfasser]. "Laser characterization and stabilization for precision interferometry / Patrick Kwee." Hannover : Technische Informationsbibliothek und Universitätsbibliothek Hannover, 2010. http://d-nb.info/1000893626/34.

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6

Ahmed, H. H. I. S. "Frequency selection and stabilization of semiconductor laser diode systems." Thesis, Swansea University, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.635861.

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Different types of semiconductor diode laser sources were tested in a range of spectroscopic and metrological applications to demonstrate the versatility of our laser set-up implementations. Two main topics were pursued in this study: (a) experiments on absorption spectroscopy were carried out using external cavity laser diode modules in the wavelength range (410 – 1550 nm) while vertical cavity surface emitting lasers (VCSELs) were used in the experiments involving opto-galvanic spectroscopy and laser frequency stabilization at 800.6 nm. Absorption experiments were performed for the quantitat

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7

Cunado, Jose. "CONTROL AND STABILIZATION OF LASER PLASMASOURCES FOR EUV LITHOGRAPHY." Master's thesis, University of Central Florida, 2007. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/2746.

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Extreme Ultraviolet (EUV) sources rely on droplet laser plasmas for EUV generation. These sources consist of a small (30 μm diameter) droplet which is excited into plasma emitting EUV around 13.5 nm, the industry's chosen wavelength for EUV lithography (EUVL). These sources are the best candidates for the commercialization of EUVL allowing mass production of computer chips with 32 nm or even smaller feature size. However, the biggest challenges which EUV source developers encounter today are the issues of conversion efficiency (CE) and debris.In order to satisfy the technology requirement

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8

Trad, Nery Marina [Verfasser]. "Laser power stabilization via radiation pressure / Marina Trad Nery." Hannover : Gottfried Wilhelm Leibniz Universität, 2021. http://d-nb.info/1234147564/34.

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9

Stacey, John-Patrick. "Stabilization and control in a linear ion trap." Thesis, University of Oxford, 2003. http://ora.ox.ac.uk/objects/uuid:5c019c02-c313-4fb4-92f4-8a342dd5dbf6.

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This thesis describes experimental work towards developing a trapped ion quantum information processor. An existing ion trap apparatus was capable of trapping and laser-cooling single ions or small ion strings of 40 Ca+, and had been used for studies of quantum jumps and natural lifetime measurements in Ca. This thesis describes improvements in this apparatus, which have allowed the stability and the flexibility of experimental control of the ions to be greatly increased. This enabled experiments to read out the spin state of a single trapped ion, and to load ions with isotope selectivity thro

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10

Byrne, Nicole (Nicole Malenie). "Phase stabilization of laser beams in a cold atom accelerometer." Thesis, Massachusetts Institute of Technology, 2014. http://hdl.handle.net/1721.1/96460.

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Thesis: S.M., Massachusetts Institute of Technology, Department of Mechanical Engineering, 2014.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (pages 95-97).<br>A cold atom accelerometer measures the displacement of a proof mass of laser cooled atoms with respect to an instrument reference frame. The cold atom interferometer's reference frame is defined by a pair of specially prepared, counter-propagating laser beams, that measure inertially induced atom displacements with nm scale resolution. This corresponds to acceleration sensitivities comparable to state

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11

Chong, Michael. "Optical power stabilization of a laser diode for qnd measurement." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2013. http://amslaurea.unibo.it/5892/.

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La realizzazione di stati non classici del campo elettromagnetico e in sistemi di spin è uno stimolo alla ricerca, teorica e sperimentale, da almeno trent'anni. Lo studio di atomi freddi in trappole di dipolo permette di avvicinare questo obbiettivo oltre a offrire la possibilità di effettuare esperimenti su condesati di Bose Einstein di interesse nel campo dell'interferometria atomica. La protezione della coerenza di un sistema macroscopico di spin tramite sistemi di feedback è a sua volta un obbiettivo che potrebbe portare a grandi sviluppi nel campo della metrologia e dell'informazione quan

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12

Drollinger, Cy Taylor. "Frequency stabilization of an external cavity diode laser employing digital control." Thesis, Montana State University, 2006. http://etd.lib.montana.edu/etd/2006/drollinger/DrollingerC0806.pdf.

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13

Zhu, Feng. "Carrier envelope phase stabilization of a femtosecond laser and iodine spectroscopy." Texas A&M University, 2005. http://hdl.handle.net/1969.1/4274.

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The carrier envelope (CE) phase of a femtosecond laser was stabilized. The laser produces an ultra stable comb of frequency spanning the visible region and basically is an optical frequency synthesizer and ready for the frequency domain applications. In this context, the CW stability of the Ti:sapphire laser is discussed to provide a procedure for the femtosecond laser adjustments. In addition, the pulse trains emitted by the femtosecond laser are described analytically to provide a theoretical basis for carrier envelope phase stabilization. An f to 2f interferometer was used to detect the car

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14

Hanke, Manuela Melanie [Verfasser]. "Laser frequency stabilization for the sub-SQL interferometer / Manuela Melanie Hanke." Hannover : Gottfried Wilhelm Leibniz Universität Hannover, 2018. http://d-nb.info/1170355609/34.

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15

Borchers, Bastian. "Pushing frontiers in Carrier-Envelope Phase stabilization of ultrashort laser pulses." Doctoral thesis, Humboldt-Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät, 2015. http://dx.doi.org/10.18452/17137.

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Die vorliegende Arbeit ist der Verbesserung der Carrier-Envelope Phasenstabilisierung von ultrakurzen Laserimpulsen gewidmet. Zur Realisierung von Fortschritten auf diesem Gebiet werden die grundlegenden Rauschquellen identifiziert, die das erzielbare Restphasenrauschen limitieren, und geeignete Maßnahmen zu deren Verringerung vorgeschlagen. Es wird gezeigt, dass sowohl die Messung der Carrier-Envelope Phase (CEP) als auch deren Kontrolle durch verschiedene Rauschbeiträge beeinträchtigt wird. Der Detektionsprozess ist dabei einerseits durch technische Rauschquellen beeinflusst, die vor allem i

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16

Tröbs, 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.

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17

Oppermann, Patrick [Verfasser]. "Characterization and stabilization of a high power fiber amplifier laser / Patrick Oppermann." Hannover : Technische Informationsbibliothek (TIB), 2017. http://d-nb.info/1136882707/34.

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18

Rollins, Jameson Graef 1976. "Intensity stabilization of a solid-state laser for interferometric gravitational wave detectors." Thesis, Massachusetts Institute of Technology, 2004. http://hdl.handle.net/1721.1/29368.

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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Physics, 2004.<br>Includes bibliographical references (p. 69-71).<br>A high-power, low noise photo-detector, in conjunction with a current shunt actuator has been used in an AC-coupled servo to stabilize the intensity of a 10 Watt continuous-wave Nd:YAG laser. A relative intensity noise of 1 x 10⁻⁸ [square root] Hz at 10 Hz has been achieved.<br>by Jameson Graef Rollins.<br>S.M.

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19

Moon, Eric Wayne. "Carrier-envelope phase stabilization of grating-based chirped-pulse amplifiers." Diss., Manhattan, Kan. : Kansas State University, 2009. http://hdl.handle.net/2097/1125.

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20

Thorin, Emil. "Towards the carrier-envelope phase stabilization of a16 TW 4.5 fs laser system." Thesis, Umeå universitet, Institutionen för fysik, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-152443.

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In the last decades the scientific development has made it possible to produce pulses with durations below the femtosecond time scale (1 fs = 1015 s), reaching to attoseconds (1 as = 1018 s). This is the time scale of electronic motion inside atoms and molecules. One way to produce isolated attosecond pulses is through high harmonic generation in gases with intense few-cycle laser pulses. This process depends strongly on the electric field shape relative to the pulse envelope, which is characterized by the so called carrier-envelope phase (CEP).The goal of this master’s thesis is to measure an

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21

Guionie, Marie. "Lasers à fibres bifréquences bipolarisations : stabilisation et montée en fréquence du battement." Thesis, Rennes 1, 2020. http://www.theses.fr/2020REN1S059.

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Cette étude porte sur les lasers à fibres bifréquences bipolarisations. Le contrôle de la différence de fréquence de ces lasers représente un enjeu important en photonique microonde. En effet, maîtriser le battement permettrait la réalisation de sources compactes et à faible bruit visant des applications de métrologie ou télécom. Nous travaillons ici sur des sources émettant à 1,5 μm, de type DFB ou DBR, soit dopés Er soit co-dopés Er-Yb. Ils présentent une fréquence de battement d'environ 1 GHz pour les DFB, et 100 MHz pour les DBR. Les objectifs de la thèse ont été, d'abord de stabiliser le

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22

Quinlan, Franklyn. "LOW NOISE, HIGH REPETITION RATE SEMICONDUCTOR-BASED MODE-LOCKED LASERS FOR SIGNAL PROCESSING AND COHERENT COMMUNICATIONS." Doctoral diss., University of Central Florida, 2008. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/3393.

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This dissertation details work on high repetition rate semiconductor mode-locked lasers. The qualities of stable pulse trains and stable optical frequency content are the focus of the work performed. First, applications of such lasers are reviewed with particular attention to applications only realizable with laser performance such as presented in this dissertation. Sources of timing jitter are also reviewed, as are techniques by which the timing jitter of a 10 GHz optical pulse train may be measured. Experimental results begin with an exploration of the consequences on the timing and amplitud

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23

Rovige, Lucas. "Optimization, stabilization and optical phase control of a high-repetition rate laser-wakefield accelerator." Electronic Thesis or Diss., Institut polytechnique de Paris, 2022. http://www.theses.fr/2022IPPAE011.

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Cette thèse de doctorat présente le travail expérimental sur le développement d'un accélérateur laser-plasma à haut taux de répétition (kHz) utilisant des impulsions laser de quelques milijoules, et de durée proche du cycle optique. Nous explorons un large ensemble de paramètres expérimentaux pour optimiser l'accélérateur en contrôlant la densité et le profil plasma, la durée des impulsions, le type de gaz et le mécanisme d'injection utilisés dans les expériences. Nous démontrons une amélioration significative des performances, notamment avec d’importants progrès réalisés sur la stabilité et l

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24

Bouchard, Line. "Stabilization of an FM active harmonic mode-locked fiber laser at high repetition rates." Thesis, University of Ottawa (Canada), 2005. http://hdl.handle.net/10393/27614.

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A new and simple approach was optimized for stabilizing a harmonic active mode-locked fiber laser at 40GHz. A computer tunes the modulation frequency in a 500kHz band near 40GHz to follow variations in the optical cavity length. A second approach based on a Proportional-Integral ( PI) controller and a piezo fiber stretcher was also developed and optimized. This approach uses a circuit-controlled piezo (PZT) device to physically counteract optical cavity length variations. The optimized circuit-controlled and computer-controlled approaches were compared to draw conclusions on their performance.

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25

Lally, Evan M. "A Narrow-Linewidth Laser at 1550 nm Using the Pound-Drever-Hall Stabilization Technique." Thesis, Virginia Tech, 2006. http://hdl.handle.net/10919/34739.

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Linewidth is a measure of the frequency stability of any kind of oscillator, and it is a defining characteristic of coherent lasers. Narrow linewidth laser technology, particularly in the field of fiber-based infrared lasers, has progressed to the point where highly stable sources are commercially available with linewidths on the order of 1-100 kHz. In order to achieve a higher level of stability, the laser must be augmented by an external frequency stabilization system. This paper presents the design and operation of a frequency locking system for infrared fiber lasers. Using the Pound-Dre

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26

Mandre, Shyam K. "Controlling the emission properties of high power semiconductor lasers stabilization by optical feedback and coherence control." Berlin Logos-Verl, 2006. http://deposit.d-nb.de/cgi-bin/dokserv?id=2833481&prov=M&dok_var=1&dok_ext=htm.

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27

Ayling, Neroli Kim. "Organometallics in the Stabilization of Dyed Fibres." Thesis, University of Canterbury. Chemistry, 2008. http://hdl.handle.net/10092/1693.

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It has been observed that in certain cases the exposure of dyed fibres to aging techniques results in the strengthening of fibres. This thesis explores the hypothesis that the strengthening is due to radical cross-coupling reactions that could be initiated through metal ion mediated photodecarboxylation. The approaches taken in this research include kinetic experiments (using flash photolysis), examination of possible cross-coupling experiments (using species of opposite charge), and the design and examination of small molecule model systems. A flash photolysis system was developed and used in

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28

Ebadi, Hossein [Verfasser], and Christoph H. [Akademischer Betreuer] Keitel. "Stabilization and interference in high-frequency laser driven atoms / Hossein Ebadi ; Betreuer: Christoph H. Keitel." Heidelberg : Universitätsbibliothek Heidelberg, 2011. http://d-nb.info/1179228898/34.

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29

SANTAGATA, ROSA. "Sub-nanometer length metrology for ultra-stable ring laser gyroscopes." Doctoral thesis, Rosa Santagata, 2015. http://hdl.handle.net/11365/1004514.

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Large-frame ring laser gyroscopes are extremely sensitive inertial detectors of rotational motion. When properly coupled to the ground, they provide precise measurements of the Earth rotation rate and give important informations to geodesy and geophysics. Recent advances in this technology led to consider the application of ring laser gyroscopes to fundamental physics. In this context is GINGER (Gyroscopes IN GEneral Relativity), a scientic proposal for testing General Relativity (local observation of the Lense-Thirring eect) with a ground-based array of ring laser gyroscopes. The experimental

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30

Wu, Shun. "Direct fiber laser frequency comb stabilization via single tooth saturated absorption spectroscopy in hollow-core fiber." Diss., Kansas State University, 2014. http://hdl.handle.net/2097/18373.

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Doctor of Philosophy<br>Department of Physics<br>Kristan L. Corwin<br>Portable frequency references are crucial for many practical on-site applications, for example, the Global Position System (GPS) navigation, optical communications, and remote sensing. Fiber laser optical frequency combs are a strong candidate for portable reference systems. However, the conventional way of locking the comb repetition rate, frep, to an RF reference leads to large multiplied RF instabilities in the optical frequency domain. By stabilizing a comb directly to an optical reference, the comb stability can potenti

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31

Xavier, Pradip. "Investigation of flame stabilization mechanisms in a premixed combustor using a hot gas cavity-based flame holder." Thesis, Rouen, INSA, 2014. http://www.theses.fr/2014ISAM0016/document.

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Cette thèse décrit l'étude d'une chambre de combustion innovante de type Trapped Vortex Combustor (TVC): ce concept utilise des cavités de gaz chauds pour stabiliser des flammes prémélangées pauvres. A partir d'une étude globale d'un point de fonctionnement instable, l'approche scientifique vise à différencier l'impact des différents mécanismes physiques. La structure de l'écoulement inerte est étudiée finement avant de mener une étude spatio-Temporelle sur un point de fonctionnement instable, en conditions réactives. L'analyse permet de comprendre les interactions entre la structure de la fla

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32

Ikram, Masroor. "Investigations in carbon dioxide laser stabilization and saturation spectroscopy using the Stark effect and acousto-optic modulation." Thesis, University of Cambridge, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.335729.

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33

Padgett, Miles John. "Techniques for ultra-high resolution saturation spectroscopy and laser stabilization in the 10#mu#m spectral region." Thesis, University of Cambridge, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.305843.

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34

Dawkins, Samuel T. "Sapphire room temperature optical frequency reference : design, construction and application." University of Western Australia. School of Physics, 2008. http://theses.library.uwa.edu.au/adt-WU2008.0200.

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A pair of high-stability optical frequency references has been developed. The devices are based on room temperature Fabry-Perot cavities with mirrors spaced apart by a hollow single-crystal sapphire element. The sapphire element delivers mechanical sti ness that provides improved immunity to vibrational perturbations compared with the more common spacers made from ultra-low expansion glass. The system is housed in an vacuum chamber designed to provide isolation from environmental perturbations through the use of an active thermal control system, suspension legs and a unique beam alignment syst

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35

Parslow, David. "A study of intra-cavity optoacoustic signal generation in a CO2 waveguide laser and its application to frequency stabilization." Thesis, Keele University, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.358042.

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36

Grib, Stephen William. "LAMINAR AND TURBULENT STUDY OF COMBUSTION IN STRATIFIED ENVIRONMENTS USING LASER BASED MEASUREMENTS." UKnowledge, 2018. https://uknowledge.uky.edu/me_etds/117.

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Practical gas turbine engine combustors create extremely non-uniform flowfields, which are highly stratified making it imperative that similar environments are well understood. Laser diagnostics were utilized in a variety of stratified environments, which led to temperature or chemical composition gradients, to better understand autoignition, extinction, and flame stability behavior. This work ranged from laminar and steady flames to turbulent flame studies in which time resolved measurements were used. Edge flames, formed in the presence of species stratification, were studied by first develo

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37

Agaisse, Romain. "Auto-affinement spectral laser assisté par effet Brillouin." Electronic Thesis or Diss., Université de Rennes (2023-....), 2023. http://www.theses.fr/2023URENS091.

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La stabilité en fréquence des lasers est une propriété recherchée dans de nombreux domaines tels que les communications optiques, la spectroscopie ou encore la métrologie temps-fréquence. Dans ce contexte, l’institut Foton a mis au point un principe permettant d’auto-affiner spectralement un laser à des niveaux extrêmement bas. Pour cela on pompe un résonateur Brillouin non-réciproque ce qui génère une onde Stokes spectralement pure. L’ajout d’une boucle à verrouillage de phase qui contre-réagit sur la pompe permet alors d’éviter les sauts de modes du résonateur Brillouin tout

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38

Golinelli, Anna. "Development of an original 10 kHz Ti : Sa regenerative cavity allowing 17 fs CEP stable 1 kHz TW-class amplification or wavelength tunability." Thesis, Université Paris-Saclay (ComUE), 2019. http://www.theses.fr/2019SACLS018.

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Au cours de dix dernières années la science aux attoseconde ou Physique au champ-fort a été l’objet d’un fort développement. La production d’impulsions laser énergétiques de courte durée à haute cadence et stabilisées en CEP constitue la première étape pour accéder aux dynamiques ultra-rapides caractérisant l’interaction de la matière avec une source de lumière cohérente, intense et ultra-rapide. Le travail de cette thèse consiste à améliorer globalement les performances d’un système laser Ti:Sa à haute cadence optimisé pour la génération des impulsions attoseconde. Nous avons développé une no

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39

Sands, Brian L. "Characteristics and dynamics of a passively stabilized high power and narrow-bandwidth broad-area laser coupled to an external variable length cavity." Connect to this document online, 2005. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=miami1122662023.

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Thesis (M.S.)--Miami University, Dept. of Physics, 2005.<br>Title from first page of PDF document. Document formatted into pages; contains [1], ix, 93 p. : ill. Includes bibliographical references (p. 88-93).

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40

Lamb, Thorsten [Verfasser], and ERNST [Akademischer Betreuer] BRINKMEYER. "Laser-to-RF phase detection with femtosecond precision for remote reference phase stabilization in particle accelerators / Thorsten Lamb ; Betreuer: Ernst Brinkmeyer." Hamburg : Universitätsbibliothek der Technischen Universität Hamburg-Harburg, 2017. http://d-nb.info/1133581595/34.

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Borchers, Bastian Verfasser], Thomas [Akademischer Betreuer] Elsässer, Kurt [Akademischer Betreuer] Busch, and Franz X. [Akademischer Betreuer] [Kärtner. "Pushing frontiers in Carrier-Envelope Phase stabilization of ultrashort laser pulses / Bastian Borchers. Gutachter: Thomas Elsässer ; Kurt Busch ; Franz X. Kärtner." Berlin : Mathematisch-Naturwissenschaftliche Fakultät, 2015. http://d-nb.info/1067484930/34.

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42

Borchers, Bastian [Verfasser], Thomas Akademischer Betreuer] Elsässer, Kurt [Akademischer Betreuer] Busch, and Franz X. [Akademischer Betreuer] [Kärtner. "Pushing frontiers in Carrier-Envelope Phase stabilization of ultrashort laser pulses / Bastian Borchers. Gutachter: Thomas Elsässer ; Kurt Busch ; Franz X. Kärtner." Berlin : Mathematisch-Naturwissenschaftliche Fakultät, 2015. http://nbn-resolving.de/urn:nbn:de:kobv:11-100226662.

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43

Lamb, Thorsten [Verfasser], and Ernst [Akademischer Betreuer] Brinkmeyer. "Laser-to-RF phase detection with femtosecond precision for remote reference phase stabilization in particle accelerators / Thorsten Lamb ; Betreuer: Ernst Brinkmeyer." Hamburg : Universitätsbibliothek der Technischen Universität Hamburg-Harburg, 2017. http://d-nb.info/1133581595/34.

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44

Show, Debanjan. "Asservissement en fréquence de lasers et transfert spectral de cohérence avec un interféromètre à fibre." Electronic Thesis or Diss., Université Côte d'Azur, 2025. http://www.theses.fr/2025COAZ5022.

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La thèse vise à explorer les deux aspects de la stabilisation de la fréquence laser à l'aide d'un interféromètre à ligne à retard à fibre. Premièrement, le bruit associé au processus de verrouillage lui-même, et deuxièmement, la capacité de transférer la cohérence temporelle entre les lasers à différentes longueurs d'onde.Dans la première partie de la thèse, le bruit de fréquence du battement de deux lasers à 1542 nm verrouillés sur le même interféromètre est mesuré pour étudier le bruit de verrouillage. Dans nos études, la technique Pound-Drever-Hall est utilisée pour le verrouillage de la fr

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45

Schmidt, Florian. "Laser-based Absorption Spectrometry : Development of NICE-OHMS Towards Ultra-sensitive Trace Species Detection." Doctoral thesis, Umeå : Department of Physics, Umeå Univ, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-1414.

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46

Soni, Abhishek. "Experimental Investigation of Flame Aerodynamics for Confined and Unconfined Flow for a Novel Radial-Radial Novel Injector using 2D Laser Doppler Velocimetry." University of Cincinnati / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1552656922178471.

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47

Foltynowicz, Aleksandra. "Fiber-laser-based noise-immune cavity-enhanced optical heterodyne molecular spectrometry." Doctoral thesis, Umeå universitet, Institutionen för fysik, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-22269.

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Noise-immune cavity-enhanced optical heterodyne molecular spectro-metry (NICE-OHMS) is one of the most sensitive laser-based absorption techniques. The high sensitivity of NICE-OHMS is obtained by a unique combination of cavity enhancement (for increased interaction length with a sample) with frequency modulation spectrometry (for reduction of noise). Moreover, sub-Doppler detection is possible due to the presence of high intensity counter-propagating waves inside an external resonator, which provides an excellent spectral selectivity. The high sensitivity and selectivity make NICE-OHMS partic

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Natile, Michele. "High-repetition rate CEP-stable Yb-doped fiber amplifier for high harmonic generation." Thesis, Université Paris-Saclay (ComUE), 2019. http://www.theses.fr/2019SACLS149.

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Depuis une vingtaine d’années, la physique attoseconde, via le phénomène de génération d’harmoniques d’ordres élevés (HHG), a permis de nombreuses avancées dans la compréhension des phénomènes de dynamique ultra-rapide. Les lasers femtoseconde émettant des impulsions de fortes énergies et de durées de quelques cycles optiques sont les outils indispensables à cette physique. De plus, la phase entre la porteuse et l’enveloppe (CEP) des impulsions doit être contrôlée. Récemment les lasers basés sur les fibres dopées ytterbium ont permis de transposer les expériences d’HHG à haute cadence. La stab

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Nillon, Julien. "Amplification paramétrique ultra-large bande dans l’ infrarouge en régime de forte énergie et de forte puissance moyenne." Thesis, Bordeaux 1, 2012. http://www.theses.fr/2012BOR14536/document.

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Alors que la science attoseconde connaît un développement fulgurant, le besoin de nouvelles sources laser adaptées à la génération d'impulsions attosecondes uniques est apparu. Grâce à ses propriétés d'accordabilité en fréquence et d'amplification de spectres ultra-larges à même de supporter des durées d'impulsions ultracourtes, conjuguées à la possibilité de stabiliser passivement la phase sous l'enveloppe (CEP) du champ électrique associé à l'impulsion laser, l'amplification paramétrique (OPA) s'est imposée comme un des outils incontournables pour la réalisation de telles sources.De plus, un

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Turghun, Matniyaz. "Free-space NPR mode locked erbrium doped fiber laser based frequency comb for optical frequency measurement." Thesis, Kansas State University, 2014. http://hdl.handle.net/2097/18682.

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Master of Science<br>Department of Physics<br>Brian R. Washburn<br>This thesis reports our attempt towards achieving a phase stabilized free-space nonlinear polarization rotation (NPR) mode locked erbium doped fiber laser frequency comb system. Optical frequency combs generated by mode-locked femtosecond fiber lasers are vital tools for ultra-precision frequency metrology and molecular spectroscopy. However, the comb bandwidth and average output power become the two main limiting elements in the application of femtosecond optical frequency combs. We have specifically investigated the free-spa

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