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Dissertations / Theses on the topic 'High power fiber laser'

Author: Grafiati

Published: 7 July 2024

Last updated: 31 July 2025

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1

Zhou, Renjie. "DEVELOPMENT OF HIGH POWER FIBER LASER TECHNOLOGIES." University of Dayton / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1271970621.

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2

Scurria, Giuseppe. "High power 2 μm fiber laser for mid-infrared supercontinuum generation in fluoride fibers". Thesis, Bordeaux, 2019. http://www.theses.fr/2019BORD0342.

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Le développement de sources optiques ayant une forte brillance et un large spectre est nécessaire pour différentes applications telles que les contremesures optroniques, les systèmes LIDAR et la spectroscopie. Ce travail de thèse est consacré à l'étude de la génération de supercontinuum de forte puissance dans le domaine spectral allant de 2 à 5 μm. Un laser à fibre dopé thulium, émettant à 2 μm, a été réalisé et caractérisé en régimes continu, déclenché et à verrouillage de modes déclenchés. En régime continu, une puissance de 45 W a été atteinte avec un rendement différentiel de 58%. L'intég

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3

Li, Hongbo. "Modeling Compact High Power Fiber Lasers and VECSELs." Diss., The University of Arizona, 2011. http://hdl.handle.net/10150/202712.

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Compact high power fiber lasers and the vertical-external-cavity surface-emitting lasers (VECSELs) are promising candidates for high power laser sources with diffraction-limited beam quality and are currently the subject of intensive research and development. Here three large mode area fiber lasers, namely, the photonic crystal fiber (PCF) laser, the multicore fiber (MCF) laser, and the multimode interference (MMI) fiber laser, as well as the VECSEL are modeled and designed.For the PCF laser, the effective refractive index and the effective core radius of the PCF are investigated using vectori

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4

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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5

Li, Li. "Extremely Compact High-Power Er3+-Yb3+-Codoped Phosphate Glass Fiber Lasers." Diss., The University of Arizona, 2005. http://hdl.handle.net/10150/193824.

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Extremely compact high-power fiber lasers operating at eye-safe telecom wavelength of 1.5 μm have been achieved by systematic experimental studies. Heavily Er3+-Yb3+-codoped phosphate glasses have been chosen as the host glass for our fibers and 1.5 μm lasers have been realized when pumped with 975 nm laser diodes.The first short-length cladding-pumped fiber laser with watt-level CW output power has been demonstrated by an 11-cm-long doped step-index phosphate fiber. Without active cooling, 1.5 W output power at 1535 nm has been obtained.Thermoelectric cooler has been used for heavily doped ph

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6

Bai, Jinxu. "High Power High Energy Ytterbium-doped Fiber Amplifier System." Research Showcase @ CMU, 2016. http://repository.cmu.edu/dissertations/728.

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Fiber amplifiers with high power and high pulse energy are strongly in demand for both scientific research and industrial applications. Ytterbium-doped fiber has been an outstanding choice for its broad-gain bandwidth and excellent power conversion efficiencies. In this dissertation, we introduced a compact high power high pulsed energy laser system with chirally coupled core (3C) Yb-doped fibers as the gain media. Traditional standard fibers and photonic crystal fibers are not suitable for compact high power high pulse energy laser systems because of poor higher order modes (HOMs) management

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7

Leigh, Matthew. "HIGH POWER PULSED FIBER LASER SOURCES AND THEIR USE IN TERAHERTZ GENERATION&#8194." Diss., The University of Arizona, 2008. http://hdl.handle.net/10150/193797.

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In this dissertation I report the development of high power pulsed fiber laser systems. These systems utilize phosphate glass fiber for active elements, instead of the industry-standard silica fiber. Because the phosphate glass allows for much higher doping of rare-earth ions than silica fibers, much shorter phosphate fibers can be used to achieve the same gain as longer silica fibers.This single-frequency laser technology was used to develop an all-fiber actively Q-switched fiber lasers. A short cavity is used to create large spacing between longitudinal modes. Using this method, we demon

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8

Sánchez, Bautista Enrique. "High-power, fiber-laser-pumped frequency conversion sources for the ultraviolet." Doctoral thesis, Universitat Politècnica de Catalunya, 2015. http://hdl.handle.net/10803/327591.

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High-power, stable, high-repetition-rate, picosecond ultraviolet (UV) sources are of crucial importance for a variety of applications, such as atmospheric sensing, spectroscopy or optical data storage. Further, precise material processing or laser patterning requires high energy sources with ultrashort pulses for increased accuracy. Nonlinear, single-pass, frequency conversion sources present a highly effective and simplified approach to cover the UV spectral regions inaccessible to lasers, offering potential solutions for many of the applications mentioned above. The development of high-aver

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9

Aydin, Yiğit Ozan. "Development of high-power 3 μm fiber laser sources and components". Doctoral thesis, Université Laval, 2019. http://hdl.handle.net/20.500.11794/37620.

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Les systèmes laser en fibre optique de verre fluoré se sont placés en tête de file pour la génération de lumière cohérente dans l’infrarouge moyen, de 2 à 5 μm. En particulier, les lasers à fibre opérant à 3 μm ont attiré une attention considérable puisqu’ils permettent le développement d’applications en spectroscopie, en contre-mesure militaire et en médecine. De ce fait, ces lasers ont connu des progrès considérables en termes de puissance, de qualité de faisceau, de fiabilité et de compacité dans la dernière décennie. Cette thèse s’inscrit dans cette démarche d’accroissement des performance

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10

Sims, Robert. "Development of Thulium Fiber Lasers for High Average Power and High Peak Power Operation." Doctoral diss., University of Central Florida, 2013. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/5706.

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High power thulium fiber lasers are useful for a number of applications in both continuous-wave and pulsed operating regimes. The use of thulium as a dopant has recently gained interest due to its large bandwidth, possibility of high efficiency, possibility of high power and long wavelength ~1.8 – 2.1 [micro]m. The longer emission wavelength of Tm-doped fiber lasers compared to Yb- and/or Er-doped fiber lasers creates the possibility for higher peak power operation due to the larger nonlinear thresholds and reduced nonlinear phase accumulation. One primary interest in Tm-doped fiber lasers

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11

Mart, Cody W., and Cody W. Mart. "Characterization and Power Scaling of Beam-Combinable Ytterbium-Doped Microstructured Fiber Amplifiers." Diss., The University of Arizona, 2017. http://hdl.handle.net/10150/625641.

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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 μm diameters) than conventional step-index fibers while still maintaining near-diffraction limited beam quality. These microstructured fibers are demonstrated as

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12

Yang, Hongyu S. M. Massachusetts Institute of Technology. "High energy femtosecond fiber laser at 1018 nm and high power Cherenkov radiation generation." Thesis, Massachusetts Institute of Technology, 2014. http://hdl.handle.net/1721.1/93055.

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Thesis: S.M., Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science, 2014.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (pages 51-54).<br>Two novel laser systems for ultrafast applications have been designed and built. For the seeding of a high energy cryogenically cooled Yb:YLF laser, a novel 1018 nm fiber laser system is demonstrated. It produces >35 nJ pulse energy and 5 nm spectral bandwidth. A double-cladd amplifier and an appropriate filter to optimize the system for the amplifier seeding application were emplo

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13

Heilmann, Anke. "Highly scalable femtosecond coherent beam combining system of high power fiber amplifiers." Thesis, Université Paris-Saclay (ComUE), 2018. http://www.theses.fr/2018SACLX112/document.

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Allier de fortes puissances moyennes et crêtes donne accès à un champ applicatif très large pour un système laser ultrarapide. Une technique qui s’est avérée capable de satisfaire ces exigences est la combinaison cohérente de faisceaux (CBC). Elle permet de séparer spatialement les faisceaux avant l’amplification pour les recombiner ensuite d’une manière cohérente en un unique faisceau. Afin d’obtenir une recombinaison efficace, les propriétés spatiales et spectrales de tous les faisceaux doivent être parfaitement en accord.Pour des applications comme l’accélération de particules, le recours à

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14

BRAGLIA, ANDREA. "High Power Fiber Lasers for Industrial Applications." Doctoral thesis, Politecnico di Torino, 2013. http://hdl.handle.net/11583/2506061.

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Fiber lasers can be considered a revolutionary technology in the laser field thanks to their unique properties, such as high efficiency, simplicity, compactness and robustness. These features have allowed in the last ten years their outstanding growth both in scientific and industrial applications, eroding the market share of traditional laser sources like solid-state and gas lasers. Fiber lasers power scaling to the kilowatt range is now well established and, thanks to the fiber confinement, excellent output beam quality can be obtained, with a remarkable benefit for applications. Today, high

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15

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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16

Price, Jonathan Hugh Vaughan. "The development of high power, pulsed fiber laser systems and their applications." Thesis, University of Southampton, 2003. https://eprints.soton.ac.uk/15475/.

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Rare-earth doped silica fibers have been used for many years to create continuous-wave lasers, and Er-doped fiber amplifiers are now widely used in telecommunications. In addition, cladding pumped fiber allows the efficient conversion of multimode radiation from high power, low cost, broad-stripe semiconductor laser diodes into the single-mode emission of fiber lasers. With its broad gain bandwidth and high optical conversion efficiency, Yb-doped silica fiber represents an attractive medium for the generation and amplification of high energy ultrashort optical pulses. However, these potential

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17

Piper, Andy. "The development of high power, pulsed fiber laser systems and their applications." Thesis, University of Southampton, 2006. https://eprints.soton.ac.uk/42427/.

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Due to the recent renewal in interest in fiber laser technology, continuous wave (c.w.) laser technology using rare-earth doped silica fibers has developed rapidly in the past few years. In the late 80s, Erbium Doped Fiber Amplifiers were commercialised and became widely used in the telecommunications industry. Yb-doped silica fiber is particularly attractive as its broad gain bandwidth and high optical efficiency make it a preferred choice for both pulsed and c.w. high power fiber laser and amplifier applications. With the advent of cladding pump technology, low cost, high power broad-stripe

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18

Kim, Kyungbum. "ALL-SEMICONDUCTOR HIGH POWER MODE-LOCKED LASER SYSTEM." Doctoral diss., University of Central Florida, 2006. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/2482.

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The objective of this dissertation is to generate high power ultrashort optical pulses from an all-semiconductor mode-locked laser system. The limitations of semiconductor optical amplifier in high energy, ultrashort pulse amplification are reviewed. A method to overcome the fundamental limit of small stored energy inside semiconductor optical amplifier called "eXtreme Chirped Pulse Amplification (X-CPA)" is proposed and studied theoretically and experimentally. The key benefits of the concept of X-CPA are addressed. Based on theoretical and experimental study, an all-semiconductor mode-locked

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19

Vazquez, Zuniga Luis Alonso. "Ultrafast high power fiber lasers and their applications." Thesis, University of Southampton, 2012. https://eprints.soton.ac.uk/340703/.

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In this thesis I report experimental studies toward developing versatile, compact, and reliable ultrafast sources in the 1.5 micron wavelength region, and their power scalability. The first part of the thesis reports on the development of a stable all-fiberized wavelength-tunable frequency-shifted feedback (FSF) picosecond laser. Stability of the passive mode-locking mechanism is achieved by combining the effects of nonlinear polarization evolution and a frequency shifting mechanism carried out by an acousto-optic modulator. The novel configuration generates pulses in the range of ~ 34 to 66 p

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20

Fang, Qiang. "2 μm Pulsed Fiber Laser Sources and Their Application in Terahertz Generation". Diss., The University of Arizona, 2012. http://hdl.handle.net/10150/232475.

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In this dissertation, an all-fiber-based single frequency nanosecond pulsed laser system at ~ 1918.4 nm in master-oscillator-power-amplifier (MOPA) configuration is present. The nanosecond pulse seed is achieved by directly modulating a continuous wave (CW) single frequency fiber laser using a fast electro-optical modulator (EOM) driven by an arbitrary waveform generator (AWG). One piece of single mode, large core, polarization-maintaining (PM) highly thulium-doped (Tm-doped) germanate glass fiber (LC-TGF) is used to boost the pulse power and pulse energy of these modulated pulses in the final

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21

Chaitanya, Kumar Suddapalli. "High-power, fiber-laser-pumped optical parametric oscillators from the visible to mid-infrared." Doctoral thesis, Universitat Politècnica de Catalunya, 2012. http://hdl.handle.net/10803/83528.

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High-power, continuous-wave (cw), mid-infrared (mid-IR) laser sources are of interest for variety of applications such as trace gas detection and remote sensing, which require broad spectral coverage to address the most prominent absorption features of a wide range of molecular species particularly in the mid-IR fingerprint region. On the other hand, surgical applications require high energy sources with unique pulse structure at specific wavelength in the mid-IR ranging from 6-6.5 m. Optical parametric oscillators (OPOs) offer potential sources for all the above applications. The outp

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22

Chun-Lin, Louis Chang. "High Intensity Mirror-Free Nanosecond Ytterbium Fiber Laser System in Master Oscillator Power Amplification." Thesis, National Taiwan University (Taiwan), 2014. http://pqdtopen.proquest.com/#viewpdf?dispub=3583082.

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<p> Rare-earth-doped fiber lasers and amplifiers are relatively easy to efficiently produce a stable and high quality laser beam in a compact, robust, and alignment-free configuration. Recently, high power fiber laser systems have facilitated wide spread applications in academics, industries, and militaries in replacement of bulk solid-state laser systems. The master oscillator power amplifier (MOPA) composed of a highly-controlled seed, high-gain preamplifiers, and high-efficiency power amplifiers are typically utilized to scale up the pulse energy, peak power, or average power. Furthermore,

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23

Yagci, Mahmut Emre. "Development Of A Picosecond Pulsed Mode-locked Fiber Laser." Master's thesis, METU, 2013. http://etd.lib.metu.edu.tr/upload/12615773/index.pdf.

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Fiber lasers represent the state-of-the-art in laser technology and hold great promise for a wide range of applications because they have a minimum of exposed optical interfaces, very high efficiency, and are capable of exceptional beam quality. In the near future, the most important markets such as micromachining, automotive, biomedical and military applications will begin to use this technology. The scope of this thesis is to design and develop a short picosecond pulsed fiber laser using rare-earth doped fiber as a gain medium. The proposed master oscillator power amplifier (MOPA) will be us

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24

Renaud, Cyril C. "High-power diode-pumped ytterbium-doped fibre-laser." Thesis, University of Southampton, 2001. https://eprints.soton.ac.uk/38210/.

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This thesis details the work I have done on double cladding ytterbium-doped fibre lasers. The two main subjects developed were the study of an efficient compact-launching system, and the operation of the double cladding compact fibre as a continuous-wave laser and a Q-switched laser.During this work, highly efficient side launching systems were developed. These allowed coupling of more than 70% of the pump light into the doped fibre and gave as good lasing efficiency as end-pumping system. The pump and the signal were also well separated in two different guides at the ends of the device. Effic

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25

Dulgergil, Ebru. "Development Of A Pulsed Fiber Laser For Ladar System." Master's thesis, METU, 2012. http://etd.lib.metu.edu.tr/upload/12614635/index.pdf.

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In recent years laser technology has increasingly developed with the use of fiber lasers and this has provided the possibility to implement different techniques in the defense industry. LADAR is at the forefront of these techniques. Fiber lasers constitute a perfect source for LADAR systems due to their excellent robustness, compact size and high-power generation capability. In this study we will explore the development of a pulsed fiber laser source for a LADAR system that can obtain high resolution 3D images in eye-safe region. A high power, all fiber integrated erbium system with strictly s

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26

Parsa, Shahrzad. "High-power fiber-laser-pumped picosecond nonlinear optical sources from the near- to mid-infrared." Doctoral thesis, Universitat Politècnica de Catalunya, 2018. http://hdl.handle.net/10803/620786.

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Ultrafast picosecond coherent sources in the near-to-mid-infrared (IR) spectral range are of great interest for a variety of applications such as pump-probe spectroscopy, remote sensing, photobiology and novel upconversion imaging techniques. Nonlinear optics, and in particular nonlinear frequency conversion techniques, offer an efficient and effective approach towards the realization of sources emitting such radiation, as nowadays, nonlinear frequency conversion technologies are recognised to be viable and reliable sources of laser radiation with broad wavelength tunability and power scalabil

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27

Hu, Chennan. "Two Innovative Applications Combining Fiber Optics and High Power Pulsed Laser: Active Ultrasonic Based Structural Health Monitoring and Guided Laser Micromachining." Diss., Virginia Tech, 2017. http://hdl.handle.net/10919/94130.

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This dissertation presents the exploration of two fiber optics techniques involving high power pulse laser delivery. The first research topic is "Embedded Active Fiber Optic Sensing Network for Structural Health Monitoring in Harsh Environments", which uses the fiber delivered pulse laser for acoustic generation. The second research topic is "Fiber Optics Guided Laser Micromachining", which uses the fiber delivered pulse laser for material ablation. The objective of the first research topic is to develop a first-of-a-kind technology for remote fiber optic generation and detection of acoustic

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28

Zhou, Gengji [Verfasser], and Franz X. [Akademischer Betreuer] Kärtner. "Power scaling of ultrafast mid-IR source enabled by high-power fiber laser technology / Gengji Zhou ; Betreuer: Franz Kärtner." Hamburg : Staats- und Universitätsbibliothek Hamburg, 2017. http://d-nb.info/1143868781/34.

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29

Jain, Apurva. "Applications of Volume Holographic Elements in High Power Fiber Lasers." Doctoral diss., University of Central Florida, 2012. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/5318.

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The main objective of this thesis is to explore the use of volume holographic elements recorded in photo-thermo-refractive (PTR) glass for power scaling of narrow linewidth diffraction-limited fiber lasers to harness high average power and high brightness beams. Single fiber lasers enable kW level output powers limited by optical damage, thermal effects and non-linear effects. Output powers can be further scaled using large mode area fibers, however, at the cost of beam quality and instabilities due to the presence of higher order modes. The mechanisms limiting the performance of narrow-li

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30

Fang, Qiang, Jinhui Li, Wei Shi, et al. "5 kW Near-Diffraction-Limited and 8 kW High-Brightness Monolithic Continuous Wave Fiber Lasers Directly Pumped by Laser Diodes." IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2017. http://hdl.handle.net/10150/626077.

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Tandem pumping technique are traditionally adopted to develop > 3-kW continuous-wave (cw) Yb3+-doped fiber lasers, which are usually pumped by other fiber lasers at shorter wavelengths (1018 nm e.g.). Fiber lasers directly pumped by laser diodes have higher wall-plug efficiency and are more compact. Here we report two high brightness monolithic cw fiber laser sources at 1080 nm. Both lasers consist of a cw fiber laser oscillator and one laser-diode pumped double cladding fiber amplifier in the master oscillator-power amplifier configuration. One laser, using 30-mu m-core Yb3+-doped fiber as th

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31

Nguyen, Dat. "Dynamic feedback pulse shaping for high power chirped pulse amplification system." Doctoral diss., University of Central Florida, 2013. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/5826.

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The topic of this proposal is the development of high peak power laser sources with a focus on linearly chirped pulse laser sources. In the past decade chirped optical pulses have found a plethora of applications such as photonic analog-to-digital conversion, optical coherence tomography, laser ranging, etc. This dissertation analyzes the aforementioned applications of linearly chirped pulses and their technical requirements, as well as the performance of previously demonstrated parabolic pulse shaping approaches. The experimental research addresses the topic of parabolic pulse generation in

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32

Guiraud, Germain. "Développement de sources laser à fibres dopées ytterbium haute puissance, monofréquence et à bas bruit d'intensité." Thesis, Bordeaux, 2017. http://www.theses.fr/2017BORD0648.

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Les sources laser à fibre, haute puissance et de faible largeur spectrale sont de plus en plus utiles pour des applications à la fois industrielle et scientifique. Cependant, le développement de ces sources est limité par les seuils d’apparition d’effets non-linéaires tels que la Diffusion Brillouin Stimulée (DBS) du fait d’un fort confinement de la lumière dans le coeur de la fibre. Un premier amplificateur en régime monofréquence de puissance moyenne égale à 50W a été développé à partir d’une diode laser signal de 50 mW. L’étude du bruit d’intensité sur cet amplificateur a montré que l’utili

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33

Dupriez, Pascal. "Advanced high-power pulsed fibre laser systems and their applications." Thesis, University of Southampton, 2007. https://eprints.soton.ac.uk/65498/.

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In this thesis, I report experimental studies towards power scaling of ultrashort fibre-based sources designed for applications including high average power femtosecond pulse generation and nonlinear frequency conversion. While the power produced by rare-earth doped fibre lasers operating in continuous-wave has dramatically increased within a few years to exceed the kilowatt level, pulsed fibre sources have been limited to tens of watts due to the onset of nonlinearities in fibre amplifiers. Therefore the aim is to manage fibre nonlinearities to achieve specific output properties at high avera

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34

Boechat, Alvaro A. P. "Optical fibre beam delivery of high average power Nd:YAG laser radiation." Thesis, Heriot-Watt University, 1992. http://hdl.handle.net/10399/797.

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35

Han, Jiho. "Phase modulated fibre amplifier array for high power real-time arbitrary beam shaping." Thesis, University of Cambridge, 2017. https://www.repository.cam.ac.uk/handle/1810/267906.

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Ghawas, Muhammad. "Sources picosecondes et femtosecondes à base de fibre dopées Ytterbium et applications." Electronic Thesis or Diss., Bordeaux, 2023. http://www.theses.fr/2023BORD0463.

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Les recherches industrielles ou académiques autour laser délivrant des impulsions ultracourtes reposent de plus en plus sur la technologie des lasers à fibre. Elles s’appuient sur les avantages intrinsèques des systèmes à fibre, tels que leur stabilité, compacité, l'excellente qualité modale du faisceau délivré, leur robustesse et leur facilité d'utilisation. Au cours de ce travail, nous avons réalisé l’étude détaillée d’un laser à fibre délivrant des impulsions picosecondes fonctionnant dans un régime de dispersion normale (ANDi). Ce laser a par la suite été déployé pour étudier de la générat

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37

Stephens, Timothy John. "Fibre-optic delivery of high peak power laser pulses for flow measurement." Thesis, Heriot-Watt University, 2003. http://hdl.handle.net/10399/296.

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38

Dauliat, Romain. "Advanced microstructured bers design for a robust singlemode high power laser operation." Limoges, 2013. https://aurore.unilim.fr/theses/nxfile/default/a5fd0c92-b555-4d68-a28a-3c6cf3fe34eb/blobholder:0/2013LIMO4015.pdf.

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The development of tailored micro-structured optical fibers has known a real infatuation during the last two decades allowing an outstanding management of optical properties. In particular, this approach was beneficial to the emission of a robust singlemode beam from large mode area fibers whose the core size exceeds 40 μm. This ability has made fiber lasers serious and competitive candidates for widespread applications such as micro-machining or surgery. In this purpose, several fiber structures have been devised (Large Pitch Fibers and Distributed Mode Filtering bers for instance), pushing f

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39

Takayanagi, Jun, Norihiko Nishizawa, Hiroyuki Nagai, Makoto Yoshida, and Toshio Goto. "Generation of high-power femtosecond pulse and octave-spanning ultrabroad supercontinuum using all-fiber system." IEEE, 2005. http://hdl.handle.net/2237/6770.

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40

Liu, Yizhou [Verfasser], and Franz X. [Akademischer Betreuer] Kärtner. "High-Power High-Repetition-Rate 1-µM Fiber Laser System for Strong-Field Physics and Mid-Infrared Generation / Yizhou Liu ; Betreuer: Franz X. Kärtner." Hamburg : Staats- und Universitätsbibliothek Hamburg, 2019. http://d-nb.info/119953921X/34.

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41

Rydberg, Sara. "Rare Earth elements in optical materials and design of high power ytterbium fiber laser for frequency doubling using nonlinear ppKTP crystal." Thesis, Umeå universitet, Institutionen för tillämpad fysik och elektronik, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-36138.

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42

Barnini, Alexandre. "Mise au point et caractérisation de nouvelles compositions de verres de silice dopée ytterbium par méthode plasma (SPCVD) pour application en tant que fibre laser." Thesis, Paris 6, 2017. http://www.theses.fr/2017PA066392/document.

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Les fibres optiques en silice dopées ytterbium sont couramment utilisées pour des applications laser à forte puissance depuis plusieurs années. Ces puissances ne cessent de croître en raison de progrès continus sur les procédés de fabrication des fibres optiques. Cette thèse s’intéresse à l’élaboration de cœurs de fibres optiques en silice vitreuse dopée ytterbium par un procédé plasma (SPCVD). Cette technique a été inventée en 1986 pour la fabrication de fibres optiques de télécommunications et nous l’avons adaptée dans ces travaux de thèse à la fabrication de cœurs de fibres à grande aire ef

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Crawford, Stephanie. "The Development of a High Power, Broadly Tunable 3 µm Fibre Laser for the Measurement of Optical Fibre Loss." Thesis, The University of Sydney, 2015. http://hdl.handle.net/2123/13989.

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Mid-Infrared Photonics has attracted growing interest in recent years due to the presence of many strong characteristic vibrational transitions that are highly resonance with the low-energy photons of the mid-infrared. As such, a plethora of potential applications stand to benefit from the availability of well-understood and robust sources within this wavelength region including spectroscopy, medicine and defence. The region surrounding 3 µm, corresponding to the antisymmetric stretching vibration of O-H as well as a region of high atmospheric transparency, is of particular interest. However,

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Barnini, Alexandre. "Mise au point et caractérisation de nouvelles compositions de verres de silice dopée ytterbium par méthode plasma (SPCVD) pour application en tant que fibre laser." Electronic Thesis or Diss., Paris 6, 2017. https://accesdistant.sorbonne-universite.fr/login?url=https://theses-intra.sorbonne-universite.fr/2017PA066392.pdf.

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Les fibres optiques en silice dopées ytterbium sont couramment utilisées pour des applications laser à forte puissance depuis plusieurs années. Ces puissances ne cessent de croître en raison de progrès continus sur les procédés de fabrication des fibres optiques. Cette thèse s’intéresse à l’élaboration de cœurs de fibres optiques en silice vitreuse dopée ytterbium par un procédé plasma (SPCVD). Cette technique a été inventée en 1986 pour la fabrication de fibres optiques de télécommunications et nous l’avons adaptée dans ces travaux de thèse à la fabrication de cœurs de fibres à grande aire ef

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Kuhn, Vincent [Verfasser]. "Near diffraction limited high-power narrow-linewidth Er3+-doped fiber amplifiers : developments towards laser sources at 1.5 [my]m wavelength for gravitational wave astronomy / Vincent Kuhn." Hannover : Technische Informationsbibliothek und Universitätsbibliothek Hannover (TIB), 2012. http://d-nb.info/101994398X/34.

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Rothhardt, Jan [Verfasser], Andreas [Akademischer Betreuer] Tünnermann, Christian [Akademischer Betreuer] Spielmann, and Uwe [Akademischer Betreuer] Morgner. "High power ultra-short pulse lasers based on fiber driven OPCPA / Jan Rothhardt. Gutachter: Andreas Tünnermann ; Christian Spielmann ; Uwe Morgner." Jena : Thüringer Universitäts- und Landesbibliothek Jena, 2011. http://d-nb.info/1016368100/34.

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Abbouab, Clara. "Étude et conception de sources laser fibrées monomodes en régime continu multi-kW." Electronic Thesis or Diss., Limoges, 2023. http://www.theses.fr/2023LIMO0088.

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Les travaux présentés dans ce manuscrit s’inscrivent dans le cadre d’une thèse CIFRE en collaboration entre le laboratoire XLIM et la compagnie industrielle des laser « CILAS ». L'objectif principal de cette thèse est l'étude et la conception de sources laser fibrées émettant en régime continu des faisceaux monomodes de puissance multi-kW. L'architecture « MOPA » (composée d’une oscillateur maître et d’un amplificateur de puissance), a été sélectionnée à l'aide de la bibliographie pour atteindre ces objectifs, puis a été réalisée à XLIM. En améliorant cette architecture, la source fibrée a dél

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Andrusyak, Oleksiy. "DENSE SPECTRAL BEAM COMBINING WITH VOLUME BRAGG GRATINGS IN PHOTO-THERMO-REFRACTIVE GLASS." Doctoral diss., University of Central Florida, 2009. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/2808.

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Beam combining techniques have become an important tool in the design of high-power high-brightness laser systems. Spectral beam combining (SBC) is an incoherent combining technique that does not require phase control of sources, allowing for a stable and robust system. Using SBC, beams from an array of lasers with each element operated at a different wavelength are combined into a single near-diffraction-limited beam with the same aperture using dispersive optical elements. SBC by means of volume Bragg gratings (VBGs) utilizes unique spectral response of VBGs: diffraction efficiency is close

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Alvarez-Chavez, Jose Alfredo. "High-power fibre lasers." Thesis, University of Southampton, 2003. https://eprints.soton.ac.uk/15478/.

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This thesis reports on the experimental study of high-power, high-energy, cladding-pumped, rare-earth (Yb3+, Er3+/Yb3+)-doped fibre lasers. Some of the main capabilities of fibre lasers such as: High brightness and thermal properties were exploited for the development of a variety of continuous wave (CW) and Q-switched devices, whose characteristics also includes compactness. Our devices could already be considered an option for several applications. The 25-year long scientific and commercial evolution that fibre lasers have experienced is discussed in the first two chapters. The invention of

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CECI, GINISTRELLI EDOARDO. "Advanced application of phosphate glass optical fibres in photonics and biophotonics." Doctoral thesis, Politecnico di Torino, 2018. http://hdl.handle.net/11583/2703875.

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The work of this thesis is focused on two research lines: the first on the development of high power fibre lasers, the second on the development of bioresorbable, inorganic optical devices. The common aspect of these two lines is the use of phosphate glasses as a base material for the fabrication of specialty optical fibres. Phosphate glasses are extremely interesting materials in virtue of the unique combination of their properties. They have been widely exploited in laser science as active gain media, due to the high solubility of rare earths in the glass matrix, and to the high absorption/

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