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Dissertations / Theses on the topic 'Fiber optic amplifier'

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Published: 4 June 2021
Last updated: 26 July 2025

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1

Scott, Davidson Arthur. "Cost and performance impacts of optical amplifier technology on fiber-optic communication networks." Master's thesis, This resource online, 1995. http://scholar.lib.vt.edu/theses/available/etd-02162010-020236/.

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2

Xie, Weilin. "Nonlinear properties of phase-sensitive fiber-optic parametric amplifiers for signal processing." Thesis, Université Paris-Saclay (ComUE), 2018. http://www.theses.fr/2018SACLS108/document.

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La capacité et les performances des systèmes à fibres optiques et photoniques dépendent fortement du bruit et des non-linéarités des amplificateurs optiques. Dans ce contexte, les amplificateurs paramétriques à fibre optique (PS-FOPA), reposant sur le mélange à quatre ondes dans les fibres optiques, surpassent les amplificateurs conventionnels insensibles à la phase. En effet, leur sensibilité à la phase peut être exploitée pour l'amplification sans bruit et al compensation de la distortion non-linéaire. En conjonction avec leur large spectre de gain et d'autres fonctionnalités telles que la c
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3

Stegeman, Robert. "Direct Nonlinear Optics Measurements of Raman Gain in Bulk Glasses and Estimates of Fiber Performance." Doctoral diss., University of Central Florida, 2006. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/2899.

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The need for more bandwidth in communications has stimulated the search for new fiberizable materials with properties superior to fused silica which is the current state-of-the-art. One of the key properties is Raman gain by which a pump beam amplifies a signal beam of longer wavelength. An apparatus capable of directly measuring the spectral dependence and absolute magnitude of the material Raman gain coefficient using nonlinear optics techniques has been built. Using radiation from a 1064 nm Nd:YAG laser as the pump and from a tunable Optical Parametric Generator and Amplifier as the signal,
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4

LI, XIAOXU. "WAVELENGTH-DIVISION-MULTIPLEXED TRANSMISSION USING SEMICONDUCTOR OPTICAL AMPLIFIERS AND ELECTRONIC IMPAIRMENT COMPENSATION." Doctoral diss., University of Central Florida, 2009. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/4025.

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Over the last decade, rapid growth of broadband services necessitated research aimed at increasing transmission capacity in fiber-optic communication systems. Wavelength division multiplexing (WDM) technology has been widely used in fiber-optic systems to fully utilize fiber transmission bandwidth. Among optical amplifiers for WDM transmission, semiconductor optical amplifier (SOA) is a promising candidate, thanks to its broad bandwidth, compact size, and low cost. In transmission systems using SOAs, due to their large noise figures, high signal launching powers are required to ensure reasonab
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5

Kabalan, Ali. "Etude de systèmes radio sur fibre pour des applications de réseaux domestiques en bande millimétrique." Thesis, Paris Est, 2016. http://www.theses.fr/2016PESC1013/document.

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La croissance sans cesse de la demande des débits de données élevés durant ces dernières décennies, soutenue par le déploiement des réseaux optiques permettant un débit de l’ordre de plusieurs Gbit/s a conduit naturellement vers l’intérêt de développement des applications à 60 GHz dans les réseaux locaux. Des normes telles que l’IEEE 802.15.3c et IEEE 802.11ad pour la transmission sans fil en bande millimétrique ont été proposées. A de telles fréquences, les pertes en espace libre sont très élevées et les ondes radios ne traversent pas les murs. Les liaisons radio sur fibre (RoF), utilisées co
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6

Tsutsumi, Takuya. "Field Measurement and Analysis of Next-Generation Optical Access Network with Optical Amplifiers." Kyoto University, 2018. http://hdl.handle.net/2433/232417.

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7

Arnould, Aymeric. "Ultra-wideband and high symbol rate transmission systems for next-generation optical fiber communications." Electronic Thesis or Diss., Institut polytechnique de Paris, 2021. http://www.theses.fr/2021IPPAS006.

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Les transmissions par fibre optique ont permis le développement de réseaux robustes et performants formant la base du système mondial de télécommunications. Alors que les fibres à faibles pertes et les amplificateurs à fibre dopée à l'erbium (EDFA) ont ouvert la voie au multiplexage en longueur d'onde (WDM), la détection cohérente permet l'utilisation de techniques de modulation et de codage avancées et le traitement du signal numérique (DSP) est utilisé pour compenser les effets physiques de propagation. Dans cette thèse, nous nous intéressons à des solutions pour la prochaine génération de s
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8

Secmen, Basak. "Simulation On Interferometric Fiber Optic Gyroscope With Amplified Optical Feedback." Master's thesis, METU, 2003. http://etd.lib.metu.edu.tr/upload/1253657/index.pdf.

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Position and navigation of vehicle in two and three dimensions have been important as being advanced technology. Therefore, some system has been evaluated to get information of vehicle&rsquo<br>s position. Main problem in navigation is how to determine position and rotation in three dimensions. If position and rotation is determined, navigation will also be determined with respect to their initial point. There is a technology that vehicle velocity can be discovered, but a technology that rotation can be discovered is needed. Sensor which sense rotation is called gyroscope. If this instrument c
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9

Raad, Bechara. "Tunnel filters and optical amplifiers for use in fiber optic communication systems." Thesis, This resource online, 1991. http://scholar.lib.vt.edu/theses/available/etd-10222009-125140/.

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10

Hwang, Bor-Chyuan. "Short erbium doped phosphate fiber amplifiers." Diss., The University of Arizona, 2000. http://hdl.handle.net/10150/289174.

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Spectroscopic properties of high concentration Er³⁺-doped phosphate glasses and performance of short Er³⁺-doped phosphate fiber amplifiers were studied and characterized. Systematic studies of cooperative upconversion of Er³⁺ ions in ⁴I₁₃/₂ level and energy transfer from Yb³⁺ to Er³⁺ in phosphate glasses were performed by a rate equation formalism. The cooperative upconversion coefficient for an Er³⁺ concentration of 4 x 10²⁰ ions/cm³ was found to be 1.1 x 10⁻¹⁸ cm³/s. An energy transfer coefficient of 1.1 x 10⁻¹⁶ cm³/s was found for an Yb³⁺ concentration of 6 x 10²⁰ ions/cm3 and an Er³⁺ conc
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11

Hu, Yongdan. "High-concentration erbium-doped glasses, fiber amplifiers and lasers." Diss., The University of Arizona, 2001. http://hdl.handle.net/10150/279804.

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Upconversion coefficients in a new high-concentration erbium-doped tellurite glass were obtained a schematic study of experiments and modeling. The upconversion coefficient for ⁴I₁₃/₂ + ⁴I₁₃/₂ → ⁴I₉/₂ + ⁴I₁₅/₂ is found to be 2.74 x 10⁻¹⁸ cm³/s and for ⁴I₁₁/₂ + ⁴I₁₁/₂ → ⁴I₁₅/₂ + ²F₇/₂ is 1.09 x 10⁻¹⁸ cm³/s. The performance of high concentration Er³⁺+-Yb³⁺ -codoped phosphate fiber amplifiers and the performance of a high-power Er³⁺-Yb³⁺-codoped phosphate fiber laser were presented. From a 3.6cm-long fiber, 18 dB internal gain i.e. 5 dB/cm, for small signal input at 1535 nm, was achieved. With
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12

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

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<p> In this dissertation, high-power ytterbium-doped fiber amplifiers designed with advanced waveguide concepts are characterized and power scaled. Fiber waveguides utilizing cladding microstructures to achieve wave guidance via the photonic bandgap (PBG) effect and a combination of PBG and modified total internal reflection (MTIR) have been proposed as viable single-mode waveguides. Such novel structures allow larger core diameters (>35 ?m diameters) than conventional step-index fibers while still maintaining near-diffraction limited beam quality. These microstructured fibers are demonstrated
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13

Häfele, Martin. "High-speed wideband GaAs PHEMT amplifiers for 40 gb/s fiber-optic communication systems." Göttingen Cuvillier, 2009. http://d-nb.info/99641861X/04.

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14

Coles, James. "Advanced phase modulation techniques for stimulated brillouin scattering suppression in fiber optic parametric amplifiers." Diss., [La Jolla] : University of California, San Diego, 2009. http://wwwlib.umi.com/cr/ucsd/fullcit?p1464928.

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Thesis (M.S.)--University of California, San Diego, 2009.<br>Title from first page of PDF file (viewed July 14, 2009). Available via ProQuest Digital Dissertations. Includes bibliographical references (p. 62-63).
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15

Liang, Yu, and 梁羽. "Versatile photonic processor based on fiber optical parametric amplifiers." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2009. http://hub.hku.hk/bib/B43085362.

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16

Liang, Yu. "Versatile photonic processor based on fiber optical parametric amplifiers." Click to view the E-thesis via HKUTO, 2009. http://sunzi.lib.hku.hk/hkuto/record/B43085362.

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17

Iqbal, Ahmer. "Heterojunction bipolar transistor based distributed amplifiers for fibre optic receiver front-end applications." Thesis, University of Manchester, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.734182.

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18

Arya, Vivek. "Analysis, Design and Performance Evaluation of Optical Fiber Spectrum-Sliced WDM Systems." Diss., Virginia Tech, 1997. http://hdl.handle.net/10919/30584.

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This dissertation investigates the design and performance issues of a recently demonstrated technique, termed as spectrum-slicing, for implementing wavelength-division-multiplexing (WDM) in optical fiber systems. Conventional WDM systems employ laser diodes operating at discrete wavelengths as carriers for the different data channels that are to be multiplexed. Spectrum-slicing provides an attractive low-cost alternative to the use of multiple coherent lasers for such WDM applications by utilizing spectral slices of a broadband noise source for the different data channels. The principal bro
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19

Altuncu, Ahmet. "Distributed erbium doped fibre amplifiers (DEDFAs) for use in long haul and high bit rate soliton transmission systems." Thesis, University of Essex, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.388156.

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20

Gaida, Christian. "Peak Power Scaling of Nanosecond Pulses in Thulium based Fiber Lasers." Master's thesis, University of Central Florida, 2013. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/5742.

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Thulium based fiber lasers represent a promising alternative for pulse energy scaling and high peak power generation with ytterbium based systems at 1 micrometer. Advantages of thulium arise from the operation at longer wavelengths and a large gain bandwidth (1.8-2.1 m icrometer). Nonlinear effects, such as self phase modulation, stimulated Raman scattering and stimulated Brillouin scattering generally limit peak power scaling in fiber lasers. The longer wavelength of thulium fiber lasers and large mode field areas can significantly increase the nonlinear thresholds. Compared to 1 m sys
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21

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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22

Muguro, Kennedy Mwaura. "Effects of polarization in a distributed raman fibre amplifier." Thesis, Nelson Mandela Metropolitan University, 2011. http://hdl.handle.net/10948/d1014621.

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The need to exploit the large fibre bandwidth and increase the reach has seen the application of the Raman fibre amplifier (RFA) become indispensable in modern light wave systems. The success and resilience of RFAs in optical communication is deeply rooted in their unique optical properties and new technologies which have allowed the amplifier to come of age. However, the full potential of RFAs in optical communication and other applications are yet to be realized. More so are its polarization properties which still remain largely unexploited and have not been fully understood. In this work, f
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23

Malik, Rohit. "Experimental investigation of high-power continuous-wave fiber optical parametric amplifiers and oscillators." Thesis, Swansea University, 2010. https://cronfa.swan.ac.uk/Record/cronfa42491.

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Fiber optical parametric amplifiers (OPAs) are based on a highly-efficient four-wave mixing process. Their capability to give very high gain and large bandwidths have made them an attractive candidate for providing higher bandwidths for future telecommunication systems, such as wavelength-division multiplexed (WDM) photonics networks. In dynamic photonic networks a where number of channels are dropped and/or added all the time, the OPA gain for the other channels is affected. In this thesis we employed a well-known gain control technique, all-optical gain clamping (AOGC), and reduced the gain
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24

Moura, Luis Miguel da Silva Carvalho de. "Circuit techniques for very high speed digital optical transmission : timing extraction sub-system." Thesis, Bangor University, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.262231.

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25

Willis-Ott, Christina. "Ytterbium-doped fiber-seeded thin-disk master oscillator power amplifier laser system." Doctoral diss., University of Central Florida, 2013. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/5890.

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Lasers which operate at both high average power and energy are in demand for a wide range of applications such as materials processing, directed energy and EUV generation. Presented in this dissertation is a high-power 1 ?m ytterbium-based hybrid laser system with temporally tailored pulse shaping capability and up to 62 mJ pulses, with the expectation the system can scale to higher pulse energies. This hybrid system consists of a low power fiber seed and pre-amplifier, and a solid state thin-disk regenerative amplifier. This system has been designed to generate high power temporally t
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26

Ma, Xiaobing. "Analysis and simulation of the Kerr effect in long haul in-line fiber amplifier transmission systems." Diss., This resource online, 1994. http://scholar.lib.vt.edu/theses/available/etd-06062008-171804/.

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27

Zhang, S. L. "Optical amplifiers for fibre communications : modelling and system performance assessment." Thesis, Bangor University, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.303377.

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28

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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29

Chatterjee, Debanuj. "A theoretical investigation of fiber phase sensitive amplifiers for applications." Thesis, université Paris-Saclay, 2021. http://www.theses.fr/2021UPASP008.

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Les amplificateurs paramétriques à fibre optique (FOPA) sont prometteurs pour les systèmes de communication de demain. En particulier, les amplificateurs sensibles à la phase des fibres offrent des fonctionnalités intéressantes comme un faible bruit et un gain élevé, ce qui en fait des candidats potentiels pour des applications dans les liaisons photoniques micro-ondes. Cette thèse propose une étude théorique de tels amplificateurs sensibles à la phase destinés à certaines applications.La première partie de la thèse est consacrée au développement d'un modèle analytique pour la propagation de s
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30

Mizutani, Fausto Hossamu. "Análise de um amplificador Raman distribuído cobrindo as Bandas C e S utilizando a fibra óptica TrueWave Reach Low Water Peak." Universidade Presbiteriana Mackenzie, 2006. http://tede.mackenzie.br/jspui/handle/tede/1406.

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Made available in DSpace on 2016-03-15T19:37:37Z (GMT). No. of bitstreams: 1 FAUSTO_MIZUTANI_ENG.pdf: 975527 bytes, checksum: 1384f3ad6af75b99bf9eaa01b7a2fc3a (MD5) Previous issue date: 2006-08-29<br>The performance of a distributed Raman amplifier at C and S bands using the TrueWave Reach LWP fiber in 100 km span is analyzed through numerical simulations. The physical parameters of the fiber, such as, attenuation, dispersion, and Raman gain efficiency for C and S bands were experimentally characterized by the manufacturer, the OFS Denmark. It is required around four pumping lasers to assure
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31

Ye, Huanqing. "Organo-sensitised erbium system for optical amplification at telecommunication wavelength." Thesis, Queen Mary, University of London, 2014. http://qmro.qmul.ac.uk/xmlui/handle/123456789/9079.

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The erbium-based optical amplifier (EDFA) plays a vital role in the global fibre-optic telecommunication network. However, there are two main issues with current EDFAs, their bulky size means that they cannot be integrated into silicon-based photonic devices, and they need high pump power to produce optical gain. Here, a potential organo-erbium gain system has been invented, which could be operated under a low pump power and integrated onto a silicon-based device. The fully-fluorinated organic erbium complex [Er(ftpip)3] was mixed with a fully-fluorinated organic zinc complex [Zn(F-BTZ)2], act
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32

Mo, Weiyang, Mariya Bhopalwala, Houman Rastegarfar, and Daniel C. Kilper. "Proactive and Nondisruptive Channel Probing for Wavelength Switching in Optical Transmission." IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2017. http://hdl.handle.net/10150/626438.

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Proactive and nondisruptive channel probing is investigated for the measurement of channel power, amplifier channel gain, and optical signal-to-noise ratio (OSNR) without disrupting established wavelength-division multiplexed channels. Using a nondisruptive probe signal over a three-span link, wavelength switching-induced power excursions are predicted to be within +/- 0.2 dB, and OSNR as high as 20 dB is accurately measured with a maximum of 0.5 dB error.
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33

Pierrot, Simonette. "Propagation non linéaire et amplification d'impulsions picosecondes dans des fibres microstructurées dopées ytterbium." Thesis, Aix-Marseille, 2013. http://www.theses.fr/2013AIXM4026/document.

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Intensivement étudié depuis son apparition en 1960, le laser est un outil qui a su trouver sa place au-delà du monde académique : ses performances uniques l'ont rendu indispensable dans nombres d'applications de la vie courante. Les particularités les plus attractives du rayonnement laser sont la directivité de son émission, et le caractère quasi-monochromatique de son rayonnement.La première permet de propager un faisceau laser sur des longues distances, et également de concentrer la lumière sur des cibles aux dimensions extrêmement réduites : on parle de cohérence spatiale de l'émission lase
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34

Bai, Neng. "Mode-Division Multiplexed Transmission in Few-mode Fibers." Doctoral diss., University of Central Florida, 2013. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/5761.

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As a promising candidate to break the single-mode fiber capacity limit, mode-division multiplexing (MDM) explores the spatial dimension to increase transmission capacity in fiber-optic communication. Two linear impairments, namely loss and multimode interference, present fundamental challenges to implementing MDM. In this dissertation, techniques to resolve these two issues are presented. To de-multiplex signals subject to multimode interference in MDM, Multiple-Input-Multiple-Output (MIMO) processing using adaptive frequency-domain equalization (FDE) is proposed and investigated. Both simula
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35

Berberoglu, Halil. "Numerical Simulations On Stimulated Raman Scattering For Fiber Raman Amplifiers And Lasers Using Spectral Methods." Phd thesis, METU, 2007. http://etd.lib.metu.edu.tr/upload/3/12608986/index.pdf.

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Optical amplifiers and lasers continue to play its crucial role and they have become an indispensable part of the every fiber optic communication systems being installed from optical network to ultra-long haul systems. It seems that they will keep on to be a promising future technology for high speed, long-distance fiber optic transmission systems. The numerical simulations of the model equations have been already commercialized by the photonic system designers to meet the future challenges. One of the challenging problems for designing Raman amplifiers or lasers is to develop a numerica
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Montes, Thisien Gabriel 1988. "Caracterização experimental de fibras de vidro telurito dopado com érbio e itérbio : Experimental characterization of tellurite glass fibers doped with erbium and ytterbium." [s.n.], 2015. http://repositorio.unicamp.br/jspui/handle/REPOSIP/261920.

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Orientador: Aldário Chrestani Bordonalli<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Elétrica e de Computação<br>Made available in DSpace on 2018-08-27T14:08:20Z (GMT). No. of bitstreams: 1 Montes_ThisienGabriel_M.pdf: 6660294 bytes, checksum: 3ca5cc8372729ad8e25455441ebddef9 (MD5) Previous issue date: 2015<br>Resumo: Com a demanda por comunicação continuamente aumentando nos últimos anos, mantém-se constante a busca por aperfeiçoamento dos amplificadores ópticos a fibra. Como uma proposta de proporcionar maior largura de banda de amplificação para
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Jouanno, Jean-Marc. "Amplification optique dans des guides d'ondes réalises par échange d'ions dans des verres phosphates dopes par des terres rares." Grenoble INPG, 1995. http://www.theses.fr/1995INPG0013.

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Les amplificateurs optiques realises a partir de fibres dopees par des ions erbiums ont fait, grace a leurs bonnes performances, fortement evoluer les systemes de transmission a fibre optique. Nous en avons transpose les principes pour realiser des composants actifs d'optique integree sur des verres dopes par des terres rares. Cette technologie permet en effet une meilleure compacite et l'insertion simultanee de fonctions variees. Nous presentons les resultats obtenus dans des guides fabriques par echange ionique dans des verres phosphates. Les ions de terres rares, inclus des la synthese du m
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Louot, Christophe. "Sources de supercontinuum pour la microspectroscopie Raman cohérente large-bande." Thesis, Limoges, 2018. http://www.theses.fr/2018LIMO0015/document.

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La microspectroscopie Raman cohérente (CARS) est une méthode d'analyse optique sans marqueur qui permet d'identifier des liaisons moléculaires dans un milieu d'intérêt (échantillon) pour permettre de déterminer la composition chimique de ce milieu. Elle nécessite l'excitation concomitante de l'échantillon par deux ondes spectralement décalées (onde pompe et onde Stokes) afin de faire entrer en résonance les liaisons à détecter. Pour la détection de plusieurs liaisons simultanément (microspectroscopie Raman cohérente large-bande ou Multiplex-CARS), la source Stokes monochromatique est remplacée
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Elias, Mauro Biscaro. "Sistemas de sensores ópticos baseados em fibra óptica de perfil-W dopada com Érbio." [s.n.], 2012. http://repositorio.unicamp.br/jspui/handle/REPOSIP/264962.

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Orientadores: Carlos Kenichi Suzuki, João Batista Rosolem<br>Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Engenharia Mecânica<br>Made available in DSpace on 2018-08-21T04:05:23Z (GMT). No. of bitstreams: 1 Elias_MauroBiscaro_D.pdf: 8521258 bytes, checksum: 71367ffa68b5edac21fdf81e63c3a7b1 (MD5) Previous issue date: 2012<br>Resumo: Fibras ópticas de casca rebaixada (também conhecidas como fibras ópticas de dupla-casca ou fibras ópticas de perfil-"W") com cortes do modo fundamental proporcionam perdas distribuídas altas em comprimentos de onda longos e perdas baixas em co
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Song, Indal. "Multi-Gbit/s CMOS Transimpedance Amplifier with Integrated Photodetector for Optical Interconnects." Diss., Georgia Institute of Technology, 2004. http://hdl.handle.net/1853/4902.

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Trends toward increased integration and miniaturization of optical system components have created pressure to consolidate widely disparate analog and digital functions onto fewer and fewer chips with a goal of eventually built into a single mixed-signal chip. Yet, because of those performance requirements, the frontend circuit has traditionally used III-V compound semiconductor technologies, but the low-level of integration with other digital ICs limits the sustainability of such end products for short-distance applications. On the other hand, their CMOS counter parts, despite having such adva
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Hammani, Kamal. "Ondes scélérates et statistiques extrêmes dans les systèmes optiques fibrés." Phd thesis, Université de Bourgogne, 2011. http://tel.archives-ouvertes.fr/tel-00648126.

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Ce mémoire présente des travaux portant sur les ondes aux statistiques extrêmes qui représentent un sujet extrêmement attractif en optique depuis qu'une comparaison avec les vagues scélérates océaniques a été proposée fin 2007. Nous décrivons donc les mécanismes de formations de ces structures extrêmes dans le cadre de la propagation guidée de la lumière dans les fibres optiques. Dans une première partie, nous commençons par explorer les ondes scélérates optiques dans les supercontinuums générés par instabilité modulationnelle d'ordre 4 et proposons une méthode de stabilisation basée sur l'uti
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42

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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Costa, André Luiz Aguiar da. "Geração de sinais ópticos multi-níveis a partir de amplificação paramétrica em fibras ópticas." [s.n.], 2011. http://repositorio.unicamp.br/jspui/handle/REPOSIP/260719.

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Orientadores: Edson Moschim, Marcelo Luís Francisco Abbade<br>Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Engenharia Elétrica e de Computação<br>Made available in DSpace on 2018-08-19T01:03:29Z (GMT). No. of bitstreams: 1 Costa_AndreLuizAguiarda_D.pdf: 10372929 bytes, checksum: d9a9fba8345bb6152e472fda3ff293e6 (MD5) Previous issue date: 2011<br>Resumo: Neste trabalho foram investigadas através de experimentos e simulações computacionais duas novas técnicas de processamento óptico de sinais, que utilizam amplificação paramétrica para multiplexar as informações de dois s
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Rieznik, Andrés Anibal. "Modelagem da propagação não linear em fibras ópticas : sistemas de transmissão de dados e amplificadores paramétricos." [s.n.], 2008. http://repositorio.unicamp.br/jspui/handle/REPOSIP/277905.

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Orientador: Hugo Luis Fragnito<br>Tese (doutorado) - Universidade Estadual de Campinas, Instituto de Fisica Gleb Wataghin<br>Made available in DSpace on 2018-08-13T07:01:10Z (GMT). No. of bitstreams: 1 Rieznik_AndresAnibal_D.pdf: 2453403 bytes, checksum: 66544ed487a1cb0efeea1180adac25c3 (MD5) Previous issue date: 2008<br>Resumo: Apresentamos métodos para a otimização das simulações da propagação não linear da luz em fibras ópticas a través do Método de Split-Step Fourier (SSFM). Os dois efeitos considerados na modelagem da propagação são a dispersão e o efeito Kerr instantâneo. Estudamos tan
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Magne, Sylvain. "Etat de l'art des lasers à fibre : étude d'un laser à fibre dopée ytterbium et spectroscopie laser de fibres dopées." Saint-Etienne, 1993. http://www.theses.fr/1993STET4027.

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Cette thèse montre l'intérêt de l'amplification optique et des lasers à fibres dopées par des ions de terres-rares pour l'instrumentation et les capteurs à fibres optiques. Nous détaillons les avantages et les inconvénients d'une telle technologie placée dans son contexte d'optique intégrée, ainsi que ses perspectives d'utilisation. Apres rappel de la théorie de la propagation guidée dans les fibres optiques, les technologies permettant de réaliser des fibres optiques dopées sont décrites. Une étude comparative des méthodes d'analyses de préformes et de fibres dopées permettant de déterminer l
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Palma, Giuseppe. "Design of microlaser in medium infrarer wavelengnth range for biomedicine and environmental monitoring." Thesis, Rennes 1, 2017. http://www.theses.fr/2017REN1S017/document.

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Les micro-résonateurs optiques comptent parmi les dispositifs les plus importants en photonique. Les résonateurs WGM sont assez particuliers. Il s'agit de composant présentant une symétrie circulaire comme c'est le cas des sphères, des anneaux, des disques et des tores. Les résonateurs WGM présentent un facteur de qualité exceptionnel et un volume modal très faible. Ces appareils peuvent être utilisés dans plusieurs domaines, notamment la télédétection, le filtrage optique et l'optique non linéaire. D'autres applications sont possibles en biologie, médecine, spectroscopie moléculaire, surveill
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Marconi, Jorge Diego. "Estudo de amplificadores paramétricos para sistemas de comunicações ópticas de altas taxas de transmissão." [s.n.], 2006. http://repositorio.unicamp.br/jspui/handle/REPOSIP/277933.

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Orientador: Hugo Luis Fragnito<br>Tese (doutorado) - Universidade Estadual de Campinas, Instituto de Fisica Gleb Wataghin<br>Made available in DSpace on 2018-08-08T21:00:40Z (GMT). No. of bitstreams: 1 Marconi_JorgeDiego_D.pdf: 6438397 bytes, checksum: df80d0a6babab0366b1839d4344573fa (MD5) Previous issue date: 2006<br>Resumo: Esta tese apresenta um estudo teórico e experimental sobre Amplificadores Paramétricos a Fibra Óptica. Mostramos primeiramente a potencialidade do amplificador em termos de largura de banda plana, necessária para aplicações em sistemas WDM. Foram desenvolvidas equ
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Daniault, Louis. "Combinaison cohérente d'amplificateurs à fibre en régime femtoseconde." Phd thesis, Université Paris Sud - Paris XI, 2012. http://tel.archives-ouvertes.fr/tel-00812629.

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Pour un grand nombre d'applications, les sources laser impulsionnelles femtoseconde (fs) doivent fournir des puissances toujours plus importantes. En régime impulsionnel, on recherche d'une part une forte puissance crête par impulsion, et d'autre part une forte puissance moyenne, c'est à dire un taux de répétition élevé. Parmi les technologies existantes, les amplificateurs à fibre optique dopée ytterbium présentent de nombreux avantages pour l'obtention de fortes puissances moyennes, cependant le fort confinement des faisceaux dans la fibre sur de grandes longueurs d'interaction induit inévit
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Kozyreff, Gregory. "Nonlinear aspects of the dynamics induced by dissipative light-matter interaction." Doctoral thesis, Universite Libre de Bruxelles, 2001. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/211644.

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Dans cette thèse, nous avons appliqué les outils modernes de la théorie des systèmes dynamiques à l'étude des lasers. Le but de ce travail était de mieux comprendre les sources cohérentes existantes en vue de les améliorer et de proposer de nouveaux mécanismes d'amplification lumineuse.<p><p>Motivé par de récentes expériences menées sur des lasers miniatures avec absorbant saturable, nous en avons repris la description théorique. Les nouvelles valeurs de paramètres suggérées par l'expérience nous ont amenés à découvrir de nouveaux comportements dynamiques pour ces systèmes. En particulier, nou
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Yeh, Chuen-Lin, and 葉春霖. "The Study of Fiber Optic Multiplexing Sensors System with Fiber Amplifier." Thesis, 1997. http://ndltd.ncl.edu.tw/handle/67591702380848071418.

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