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Dissertations / Theses on the topic 'Raman Amplification'

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Published: 4 June 2021
Last updated: 25 July 2025

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1

Céreyon, Arnaud. "Amplification Raman et nanostructures." Lyon 1, 2008. http://www.theses.fr/2008LYO10133.

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2

Calmes, Lonnie Kirkland. "Solid-state Raman image amplification." Diss., The University of Arizona, 1998. http://hdl.handle.net/10150/288920.

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Amplification of low-light-level optical images is important for extending the range of lidar systems that image and detect objects in the atmosphere and underwater. The use of range-gating to produce images of particular range bins is also important in minimizing the image degradation due to light that is scattered backward from aerosols, smoke, or water along the imaging path. For practical lidar systems that must be operated within sight of unprotected observers, eye safety is of the utmost importance. This dissertation describes a new type of eye-safe, range-gated lidar sensing element bas
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3

Fludger, Christopher Ronald Stephen. "Raman amplification for broadband optical communications." Thesis, University of Cambridge, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.620474.

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4

Ellingham, Tim John. "Raman amplification and performance altering effects." Thesis, Aston University, 2006. http://publications.aston.ac.uk/8024/.

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This thesis presents an experimental investigation into several applications of the Raman scattering effect in communication optical fibres as well as how some of these applications can be modified to enhance the resulting performance. The majority of the work contained within is based on laboratory results using many commercially available components. The results can be divided into and presented in three main parts: Firstly, a novel application of a known effect is used to broaden Raman pump light in order to achieve a more continuous distribution of gain with respect to wavelength. Multiple
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5

Ben-Dor, Adi. "Non-linear impacts of forward-raman-amplification. /." [Beer Sheva] : Ben Gurion University of the Negev, 2008. http://aranne5.lib.ad.bgu.ac.il/others/Ben-DorAdi.pdf.

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6

Neto, Berta Maria Barbosa. "Alternative techniques for Raman amplification in telecommunications." Doctoral thesis, Universidade de Aveiro, 2010. http://hdl.handle.net/10773/7526.

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Doutoramento em Física<br>O presente trabalho centra-se no estudo dos amplificadores de Raman em fibra ótica e suas aplicações em sistemas modernos de comunicações óticas. Abordaram-se tópicos específicos como a simulação espacial do amplificador de Raman, a equalização e alargamento do ganho, o uso de abordagens híbridas de amplificação através da associação de amplificadores de Raman em fibra ótica com amplificadores de fibra dopada com Érbio (EDFA) e os efeitos transitórios no ganho dos amplificadores. As actividades realizadas basearam-se em modelos teóricos, sendo os resultados v
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7

FARIA, GIANCARLO VILELA DE. "A RAMAN AMPLIFICATION STUDY USING TUNABLE OPTICAL REFLECTOMETRY." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2005. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=7734@1.

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PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO<br>Diante do crescimento do interesse pelos amplificadores Raman faz-se necessário um estudo mais detalhado destes. Uma técnica tradicionalmente já utilizada para analise de atenuação em enlaces, a reflectometria óptica no domínio do tempo, é empregada de maneira inovadora neste trabalho para a observação da amplificação Raman distribuída. O objetivo principal deste trabalho não é a analise de amplificadores Raman, mas sim a apresentação desta técnica como nova ferramenta observação do ganho Raman distribuído em fibras ópticas.<br>Due t
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8

Tan, Mingming. "Raman fibre laser based amplification in coherent transmission systems." Thesis, Aston University, 2016. http://publications.aston.ac.uk/28899/.

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The thesis presents a detailed study of different Raman fibre laser (RFL) based amplification techniques and their applications in long-haul/unrepeatered coherent transmission systems. RFL based amplifications techniques were characterised from different aspects, including signal/noise power distributions, relative intensity noise (RIN), mode structures of induced Raman fibre lasers, and so on. It was found for the first time that RFL based amplification techniques could be divided into three categories in terms of the fibre laser regime, which were Fabry-Perot fibre laser with two FBGs, weak
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9

Keïta, Kafing. "amplification Raman stimulée de signaux hyperfréquences sur porteuse optique." Phd thesis, Université Paris Sud - Paris XI, 2006. http://tel.archives-ouvertes.fr/tel-00091197.

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Ce travail vise à l'élaboration d'un système d'amplification faible bruit de signaux hyperfréquences sur porteuse optique. Nous avons mené une étude expérimentale de l'amplification Raman dans des fibres optiques monomodes à 1550nm. La configuration contra-propageante -la moins bruitée- permet d'atteindre des gains nets de plus de 25dB, elle s'est aussi montrée plus performante en termes de RIN (relative intensity noise) qu'un EDFA commercial. Une analyse théorique de l'amplification Raman a été conduite dans le domaine spectral afin de quantifier le transfert de RIN de la pompe vers le signal
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10

Vieux, Gregory. "Broad-band linear Raman chirped pulse amplification in plasma." Thesis, University of Strathclyde, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.435149.

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11

Yang, Xue. "Raman amplification of ultra-short laser pulses in plasma." Thesis, University of Strathclyde, 2013. http://oleg.lib.strath.ac.uk:80/R/?func=dbin-jump-full&object_id=23192.

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This thesis presents the experimental investigation of Raman amplification of ultrashort laser pulses by a counter propagating chirped pump pulse through resonant excitation of a plasma density wave. Since plasma is a gain medium able to withstand very high intensities, this scheme is proposed as the basis of a new generation of laser amplifiers capable of replacing Chirped Pulse Amplification (CPA) systems, which are limited by the damage threshold of solid state gain media. In this experiment, both the pump and the probe beams are generated from a 30 TW Ti:Sapphire CPA laser system. The chir
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12

Lyachev, Andrey. "High gain ultra-short laser pulse raman amplification in plasma." Thesis, University of Strathclyde, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.486537.

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This thesis presents an experimental study of broad-band Raman chirped pulse amplification in plasma. Amplification. of a short seed pulse occurs through stimulated Raman backscattering in the presence ofa counter-propagating chirped pump pulse in a preformed plasma waveguide channel. 300 and 200 Jlm diameter, 40 rom long, hydrogen-filled capillary discharge waveguides have been investigated. The plasma channel has the dual purpose of guiding the laser pulses over distances of many Rayleigh lengths and acting· as the nonlinear medium for the Raman instability. Laser energy transmission thro
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13

Farmer, John. "Numerical models for the simulation of Raman amplification in plasma." Thesis, University of Strathclyde, 2012. http://oleg.lib.strath.ac.uk:80/R/?func=dbin-jump-full&object_id=22721.

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Raman amplification in plasma is a potential method of producing ultra-short, ultra-intense laser pulses. As amplification in realistic systems involves many competing nonlinear processes, numerical simulations are often used to better understand the associated complex behaviour. Different models offer different advantages and limitations. This work presents a study of three distinct numerical models: a particle-in-cell (PIC) code, a threewave model derived from a fluid treatment of plasma, and the envelope-PIC code aPIC. PIC codes are known to incur large computational overheads. A new numeri
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14

Rosa, Paweł. "Quasi-lossless data transmission with ultra-long Raman fibre laser based amplification." Thesis, Aston University, 2014. http://publications.aston.ac.uk/22442/.

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The project consists of an experimental and numerical modelling study of the applications of ultra-long Raman fibre laser (URFL) based amplification techniques for high-speed multi-wavelength optical communications systems. The research is focused in telecommunications C-band 40 Gb/s transmission data rates with direct and coherent detection. The optical transmission performance of URFL based systems in terms of optical noise, gain bandwidth and gain flatness for different system configurations is evaluated. Systems with different overall span lengths, transmission fibre types and data modulat
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15

David, Pierre-Gérard. "Amplification laser et diagnostic temporel de paquets d'électrons ultra-relativistes en interaction laser-plasma." Paris 11, 2004. http://www.theses.fr/2004PA112286.

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La thèse dont ce manuscrit fait l’objet traite de deux des possibles applications de l’interaction d’un laser intense avec la matière. La première de ces applications est l’utilisation d’un plasma pour catapulter des particules à des énergies relativistes. Un plasma peut en effet supporter des champs électriques cent, voir mille fois supérieurs à ceux dans les matériaux classiques. Les lasers de puissance permettent d’exploiter cette capacité en engendrant d’importants champs électriques de sillage afin d’accélérer des électrons. Dans le présent manuscrit est étudié en particulier la mise ne p
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16

Iqbal, Md Asif. "Advanced Raman amplification techniques for high capacity and broadband coherent optical transmission systems." Thesis, Aston University, 2018. http://publications.aston.ac.uk/37651/.

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This thesis presents a detailed study of different advanced Raman fibre laser (RFL) based amplification schemes and the development of novel broadband distributed and discrete Raman amplifiers in order to improve the transmission performance of modern high capacity, long-haul coherent optical systems. The numerical modelling of different Raman amplifier techniques including power distribution of signal, pump and noise components, RIN transfer from pump to signal, broadband gain optimization and so on have been described in details. The RIN and noise performances of RFL based distributed Raman
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17

Nasser, Nour. "Lumière lente par amplification paramétrique dans les fibres optiques biréfringentes." Thesis, Besançon, 2013. http://www.theses.fr/2013BESA2039/document.

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Cette thèse a pour thème le processus physique de ralentissement de la lumière induit par amplification paramétrique vectorielle dans les fibres optiques biréfringentes. Notre première étude porte sur la lumière lente induite par amplification paramétrique vectorielle dans les fibres fortement biréfringentes. Contrairement au processus scalaire, nous montrons théoriquement que le processus vectoriel offre la possibilité de créer des bandes de gain paramétrique étroites et éloignées de la pompe, permettant de générer des retards optiques très importants, un ordre de grandeur supérieurs à ceux o
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18

Goel, Nitin Kumar. "Development of "Core-Suction" Technique for Fabrication of Highly Doped Fibers for Optical Amplification and Characterization of Optical Fibers for Raman Amplification." Diss., Virginia Tech, 2005. http://hdl.handle.net/10919/29302.

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This thesis presents a novel technique named "Core Suction" for fabricating optical fiber preforms for manufacturing highly doped fibers (HDFs) for optical amplification (Raman effect based or Erbium fiber based). The technique involves drawing the molten non-conventional core glass material into the silica cladding tube to form the preform. The developed technique is simple, inexpensive and shows great potential for fabricating preforms of highly nonlinear non-conventional multi-component glasses as the core material. Preforms were made with various core glasses such as Schott SF6, Lead-Tell
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19

Hardy, Maxime. "Amplification d'impulsions brèves de haute énergie par effet Raman stimulé dans les fibres optiques." Master's thesis, Université Laval, 2016. http://hdl.handle.net/20.500.11794/27227.

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Le développement au cours des dernières décennies de lasers à fibre à verrouillage de modes permet aujourd’hui d’avoir accès à des sources fiables d’impulsions femtosecondes qui sont utilisées autant dans les laboratoires de recherche que pour des applications commerciales. Grâce à leur large bande passante ainsi qu’à leur excellente dissipation de chaleur, les fibres dopées avec des ions de terres rares ont permis l’amplification et la génération d’impulsions brèves de haute énergie avec une forte cadence. Cependant, les effets non linéaires causés par la faible taille du faisceau dans la fib
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20

Nardou, Éric. "Nanoparticules métalliques en matrices vitreuses pour l’amplification Raman." Thesis, Lyon 1, 2011. http://www.theses.fr/2011LYO10207/document.

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Les fibres optiques utilisées pour le transfert d’information présentent des pertes de signal pendant leur propagation. Ainsi, ces signaux ont besoin d’être régulièrement amplifiés. De nos jours, l’Amplification Raman, basée sur le principe de diffusion Raman stimulée, est une des techniques utilisées pour réaliser ces amplifications. Les nanoparticules de métaux nobles ont des propriétés optiques uniques provenant de l’oscillation collective des électrons lorsqu’elles interagissent avec une onde électromagnétique. Ces particules absorbent fortement le champ électromagnétique à une fréquence a
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21

Provino, Laurent. "Génération et amplification contrôlées de très larges bandes spectrales dans les fibres optiques conventionnelles et microstructurées." Besançon, 2002. http://www.theses.fr/2002BESA2042.

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Ce manuscrit de thèse est organisé en deux parties. Une première partie théorique porte sur l'étude du processus d'amplification paramétrique de signaux faibles dans les fibres optiques, conventionnelles ou no linéaires, afin de concevoir des amplificateurs optiques à ultra-larges bandes spectrales et à profil de gain plat, deux critères essentiels permettant d'accroître les débits des transmissions multiplexées en longueur d'onde. Un second volet s'intéresse à une nouvelle génération de fibre en silice, la fibre microstructurée. Les propriétés peu communes de ces fibres ont été étudiées en dé
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22

Guermache, Ali. "Etude et réalisation de lasers de pompe à 1480 nm pour l'amplification Raman." Phd thesis, Télécom ParisTech, 2005. http://pastel.archives-ouvertes.fr/pastel-00001247.

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L'étude concerne les lasers de puissance à semi-conducteurs émettant aux alentours de 1480nm dont l'utilisation principale est l'amplification Raman dans les fibres optiques pour les futurs systèmes de télécommunications. Cette amplification nécessite des puissances de pompe supérieures à 400mW. Les travaux ont porté sur la conception et la caractérisation des lasers de pompe en vue d'une augmentation de la puissance de sortie. Après avoir identifier les principaux effets limitant la puissance des pompes (effets thermiques, Longitudinal Spatial Hole Burning, pertes internes), trois solutions o
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23

Benoit, Aurélien. "Sources laser fibrées hybrides de haute puissance : Amplification et conversion de fréquences." Thesis, Limoges, 2015. http://www.theses.fr/2015LIMO0024/document.

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Les lasers à fibre de haute puissance constituent depuis une dizaine d’année un outil pertinent pour un nombre croissant d’applications. Dans le cadre d’un contrat CIFRE entre la société Eolite Systems et le laboratoire Xlim (UMR 7252 du CNRS et de l’Université de Limoges), mon projet de thèse a consisté à développer les briques technologiques de futures sources lasers<br>High-power fiber lasers adress an increasing number of applications since ten years. In the frame of a CIFRE contract between the company Eolite Systems and Xlim (joint laboratory between CNRS and the University of Limoges),
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24

Paiva, Getúlio Eduardo Rodrigues de. "Estudo de esquemas de amplificação para redes PON de longo alcance." Universidade de São Paulo, 2012. http://www.teses.usp.br/teses/disponiveis/18/18155/tde-07052012-095117/.

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O surgimento de novos serviços que requerem uma largura de banda cada vez maior, bem como o crescente número de usuários de tais serviços, têm introduzido desafios às empresas operadoras de telecomunicações em sua capacidade de atender a estas demandas sem perda apreciável da qualidade de serviço e mantendo, ainda assim, os custos num nível aceitável pelos usuários. Neste contexto, redes ópticas passivas (PONs) vêm atraindo grande interesse em anos recentes. Na sua variante de longo-alcance, as redes PON permitem uma consolidação do uso dos equipamentos e centrais de serviço requeridos, reduzi
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25

Nardou, Éric. "Nanoparticules métalliques en matrices vitreuses pour l'amplification Raman." Phd thesis, Université Claude Bernard - Lyon I, 2011. http://tel.archives-ouvertes.fr/tel-00740971.

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Les fibres optiques utilisées pour le transfert d'information présentent des pertes de signal pendant leur propagation. Ainsi, ces signaux ont besoin d'être régulièrement amplifiés. De nos jours, l'Amplification Raman, basée sur le principe de diffusion Raman stimulée, est une des techniques utilisées pour réaliser ces amplifications. Les nanoparticules de métaux nobles ont des propriétés optiques uniques provenant de l'oscillation collective des électrons lorsqu'elles interagissent avec une onde électromagnétique. Ces particules absorbent fortement le champ électromagnétique à une fréquence a
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26

Sylvestre, Thibaut. "AMPLIFICATION ET CONVERSION PARAMETRIQUES, DECALAGE ET SUPPRESSION DE FREQUENCES PAR PROCESSUS KERR ET RAMAN DANS LES FIBRES OPTIQUES." Phd thesis, Université de Franche-Comté, 1999. http://tel.archives-ouvertes.fr/tel-00006109.

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Cette thèse porte sur une étude détaillée, théorique et expérimentale, des phénomènes paramétriques, de la diffusion Raman stimulée et de leurs interactions mutuelles, survenant lors de la propagation d'ondes électromagnétiques intenses dans les fibres optiques unimodales. Ce travail vise notamment à suggérer de nouvelles fonctions de traitement tout-optique pour les télécommunications par fibres optiques. Une partie importante du travail met à profit la forte biréfringence des fibres à maintien de polarisation pour réaliser l'amplification paramétrique (ou instabilité de modulation induite) d
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27

Finot, Christophe. "Similaritons dans les amplificateurs Raman à fibre optique." Phd thesis, Université de Bourgogne, 2005. http://tel.archives-ouvertes.fr/tel-00011124.

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Ce mémoire présente la génération de similaritons dans un amplificateur Raman à dispersion normale aux longueurs d'onde des télécommunications optiques. Les profils temporels expérimentaux obtenus par caractérisation FROG mettent en évidence un profil d'intensité parabolique associé à une dérive de fréquence linéaire, en accord avec les résultats d'un modèle numérique.<br />Différentes propriétés théoriques des similaritons sont ensuite vérifiées expérimentalement. La dynamique de deux impulsions similaritons à des longueurs d'ondes centrales identiques ou différentes est également étudiée : l
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28

Chiarello, Fabrizio. "Analysis and application of nonlinear amplification effects in single-mode optical fibers." Doctoral thesis, Università degli studi di Padova, 2014. http://hdl.handle.net/11577/3423797.

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This thesis focuses on all-optical signal generation and processing through nonlinear amplification phenomena in single-mode fibers. Three different nonlinear fiber optical oscillators are investigated and experimentally demonstrated. A continuous-wave pump for fiber Raman amplifiers, developed with the goal of achieving high degree of polarization, tunability and suppression of stimulated Brillouin scattering, is presented, discussed and used to achieve nonlinear polarization attraction. A fast and widely tunable fiber optical oscillator based on stimulated Raman scattering and on broad- a
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29

Freedman, Benjamin Gordon. "Degenerate oligonucleotide primed amplification of genomic DNA for combinatorial screening libraries and strain enrichment." Diss., Virginia Tech, 2014. http://hdl.handle.net/10919/71346.

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Combinatorial approaches in metabolic engineering can make use of randomized mutations and/or overexpression of randomized DNA fragments. When DNA fragments are obtained from a common genome or metagenome and packaged into the same expression vector, this is referred to as a DNA library. Generating quality DNA libraries that incorporate broad genetic diversity is challenging, despite the availability of published protocols. In response, a novel, efficient, and reproducible technique for creating DNA libraries was created in this research based on whole genome amplification using degenerate oli
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Araujo, Alfredo Almeida de. "Análise de amplificação Raman em fibras microestruturadas de baixa perda." Universidade Presbiteriana Mackenzie, 2008. http://tede.mackenzie.br/jspui/handle/tede/1485.

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Made available in DSpace on 2016-03-15T19:38:07Z (GMT). No. of bitstreams: 1 Alfredo Almeida Araujo.pdf: 1307305 bytes, checksum: fd5b49227c52b28ef3a5392983927234 (MD5) Previous issue date: 2008-02-13<br>This dissertation aims to describe the basic characteristics of microstructured fibers, their concept and performance, and to investigate the application of a low loss microstructured fiber to the development of Raman amplifiers. An analysis of the use of these amplifiers in Telecommunication applications is described. To this end, simulations were carried out with these waveguides with the
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Andrasik, Stephen James. "NEW ORGANIC/INORGANIC HYBRID SOL-GEL NANOCOMPOSITE MATERIALS FOR RAMAN GAIN IN FIBER OPTICS." Master's thesis, University of Central Florida, 2004. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/4457.

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The recent increased availability of additional wavelengths in the telecommunications window of about 1300-1600 nm has generated an interest in new optical materials and devices that can operate outside the normally used regions of 840 nm, 1310 nm, and 1550 nm. Specifically, methods to amplify fiber optical data transmission in the regions where there is limited or no existing methods to achieve amplification is of interest in the chemistry and photonic communities. Raman gain is one method that has been proposed to passively amplify optical data transmission through a distributed process. Amp
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Toledo, Jair Fiuza de. "Análise de um amplificador Raman distribuído nas bandas S+ e S utilizando a fibra óptica TrueWave® Reach Low Water Peak." Universidade Presbiteriana Mackenzie, 2006. http://tede.mackenzie.br/jspui/handle/tede/1421.

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Made available in DSpace on 2016-03-15T19:37:41Z (GMT). No. of bitstreams: 1 Jair Fiuza - EE2006.pdf: 870543 bytes, checksum: 939198dd0585c5cbae3d86adf6c858cc (MD5) Previous issue date: 2006-08-29<br>The performance of a distributed Raman amplifier at S - Band using the TrueWave® Reach Low Water Peak fiber in a 100km span is analyzed through numerical simulations. The manufacturer, the OFS Fitel Denmark Ap, has experimentally characterized the physical parameters of the fiber, such as, attenuation, dispersion and Raman gain efficiency at Band - S. The low fiber attenuation around pump wav
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Ramos, Igor da Silva. "Análise sistêmica da compensação de dispersão e amplificação Raman em fibras microestruturadas." Universidade Presbiteriana Mackenzie, 2009. http://tede.mackenzie.br/jspui/handle/tede/1501.

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Made available in DSpace on 2016-03-15T19:38:12Z (GMT). No. of bitstreams: 1 Igor da Silva Ramos.pdf: 1622777 bytes, checksum: 186a77eaabf846baf8466f41da580a23 (MD5) Previous issue date: 2009-02-03<br>Fundo Mackenzie de Pesquisa<br>This work studies, through systemic modeling a microstructured optical fiber used in a module for dispersion compensation and Raman amplification for optical communication systems. The use of this device compensates the dispersion in a range of frequencies not covered by conventional dispersion compensating fibers and, simultaneously, amplifies the signal in order
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Sunday, Christopher Edozie. "The design of ultrasensitive immunosensors based on a new multi-signal amplification gold nanoparticles-dotted 4-nitrophenylazo functionalised graphene sensing platform for the determination of deoxynivalenol." Thesis, University of Western Cape, 2014. http://hdl.handle.net/11394/3361.

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Philosophiae Doctor - PhD<br>A highly dispersive gold nanoparticle-dotted 4-nitrophenylazo functionalised graphene nanocomposite (AuNp/G/PhNO2) was successfully synthesised and applied in enhancing sensing platform signals. Three label-free electrochemical immunosensors for the detection of deoxynivalenol mycotoxin (DON) based on the systematic modification of glassy carbon electrodes (GCE) with AuNp/G/PhNO2 was effectively achieved. General electrochemical impedance method was employed for the sensitive and selective detection of DON in standard solutions and reference material samples. A s
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Petit, Laëticia. "Amplification optique dans des verres borophosphate de niobium et tellurite dopés aux ions de terres rares présentant un indice optique non linéaire élevé." Phd thesis, Université Sciences et Technologies - Bordeaux I, 2002. http://tel.archives-ouvertes.fr/tel-00003919.

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Ce travail s'insère, non seulement, dans la compréhension de la relation entre la résonance des terres rares et l'indice non linéaire, mais aussi, dans la recherche de nouveaux matériaux dopés terres rares pour la commutation optique. L'introduction d'oxyde d'erbium dans des verres tellurites et borophosphates de niobium, présentant intrinsèquement une non linéarité optique de 3ème ordre élevée, a été étudiée. Il a été montré qu'il est possible de contrôler le gain et la non linéarité de matériaux dopés grâce à la corrélation établie entre l'analyse structurale et l'étude des propriétés spectr
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36

Pickartz, Sabrina. "All-optical control of fiber solitons." Doctoral thesis, Humboldt-Universität zu Berlin, 2018. http://dx.doi.org/10.18452/19468.

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Das Thema dieser Arbeit ist eine mögliche Steuerung eines optischen Solitons in nichtlinearen optischen Fasern. Es gelang, die interessierenden Solitonparameter wie Intensität, Dauer und Zeitverschiebung durch die Wechselwirkung mit einer dispersiven Welle geringer Intensität kontrollierbar zu modifizieren. Es wird eine neue analytische Theorie vorgestellt für die Wechselwirkung zwischen Solitonen und dispersiven Wellen, die auf der Kreuzphasenmodulation in nichtlinearen Fasern beruht. Das vorgestellte Modell kombiniert quantenmechnische Streutheorie und eine Erweiterung der Störungstheorie f
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Olmedo, Herrero Elena. "Étude des effets non linéaires dans les lasers et amplificateurs de puissance à fibre double gaine dopée Er3+/Yb3+." Phd thesis, Télécom ParisTech, 2003. http://pastel.archives-ouvertes.fr/pastel-00000743.

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Depuis quelques années, nous assistons à une augmentation soutenue de la demande en puissance des sources optiques. L'introduction des fibres à double gaine dopées Er3+/Yb3+ dans la conception des lasers et des amplificateurs a permis l'obtention de puissances très élevées, impossibles à imaginer quelques années auparavant. L'évolution de cette technologie, conçue en principe pour des systèmes télécom, permet d'envisager de nombreuses applications dans d'autres secteurs tels que le médical, la découpe laser, le marquage, le lidar, le perçage, le soudage, ou le traitement de surface, entre autr
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Baron, Alexandre. "Optique Non-Linéaire dans les structures semi-conductrices à fort confinement du champ." Phd thesis, Université Paris Sud - Paris XI, 2010. http://tel.archives-ouvertes.fr/tel-00573319.

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Du fait de leurs fortes propriétés non-linéaires, les structures photoniques semi-conductrices sont très intéressantes pour le traitement tout-optique du signal. La structuration à petite échelle permet de localiser la lumière et donc d'exalter les phénomènes non-linéaires, mais avec un pouvoir d'exaltation différent suivant l'ordre de la non-linéarité, introduisant ainsi une nouvelle hiérarchie des régimes d'interaction. Après une description théorique présentant le renforcement des processus non- linéaires par la localisation dans les semi-conducteurs, nous démontrons ex
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"Silicon planar lightwave circuits: raman amplification and polarization processing." 2004. http://library.cuhk.edu.hk/record=b6073665.

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Liang Tak-keung.<br>"June 2004."<br>Thesis (Ph.D.)--Chinese University of Hong Kong, 2004.<br>Includes bibliographical references.<br>Electronic reproduction. Hong Kong : Chinese University of Hong Kong, [2012] System requirements: Adobe Acrobat Reader. Available via World Wide Web.<br>Mode of access: World Wide Web.<br>Abstracts in English and Chinese.
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Wu, Jyun-Ming, and 巫俊明. "Observation of Raman Amplification on Integrated Silicon Microring Resonators." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/34661738750259139731.

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碩士<br>國立清華大學<br>光電工程研究所<br>98<br>Raman amplifiers are important for optical communication because the power of signal gradually reduces along propagation. We must use amplifiers to recover signal power strong enough for defection. A Raman amplifier is one kind of amplifiers. The Raman coefficient in silicon is much higher than in fiber(10000 times) ,and it is a reason that we are interested using silicon waveguides to make a amplifier. The size of silicon Raman amplifiers is very small and can be integrated with other devices to accomplish many optical functions on a chip. In this thesis, we
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Shih, Wei-Tong, and 施威彤. "A Study of WDM Passive Optical Network with Raman Amplification." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/hk4kca.

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碩士<br>國立中山大學<br>光電工程研究所<br>96<br>Optical fiber access technology is the key to realize a broadband communication for everyone, and the passive optical network (PON) is enabling customers to enjoy high-speed internet access now. As the demand for the broadband access is still growing, a study to find out technologies to realize wider bandwidth for the access system is quite important. At this moment, wavelength division multiplexing (WDM) PON is the most promising technology for the future optical fiber access system. Current PON system covers a reach of within 20km from a central office, becau
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GAO, MIN-SHENG, and 高銘盛. "The study of Raman amplification in optical fiber communication system." Thesis, 1986. http://ndltd.ncl.edu.tw/handle/70080582942557217107.

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Drake, Philip, Y.-C. Chen, I. Lehmann, and P.-S. Jiang. "Nanoparticle labels for pathogen detection through nucleic acid amplification tests." 2014. http://hdl.handle.net/10454/10333.

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Yes<br>Magnetic nanoparticles and surface-enhanced Raman scattering (SERS) active nanoparticles were coated with short chain DNA tags. These were then used to identify a target bacterial DNA sequence. The tags function as primers in a standard PCR with the reverse primers and forward primers on the SERS nanoparticles and magnetic nanoparticles, respectively. During the PCR cycles, a composite nanostructure is formed that is both magnetically responsive and SERS active. After magnetic trapping, the intensity of the SERS signal can be related back to the concentration of the target DNA. A test a
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Sanders, James Christopher. "Terawatt Raman laser system for two-color laser plasma interactions." Thesis, 2014. http://hdl.handle.net/2152/26001.

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In some high-field laser-plasma experiments, it is advantageous to accompany the main high-energy (~1 J) laser with a second high-energy pulse (~0.1 J) which has been frequency-shifted by ~10-20%. Such a pulse-pair would have a low walk-off velocity while remaining spectrally distinct for use in two-color pump-probe experiments. Moreover, by shifting the second pulse by ~plasma frequency, it is theoretically possible to exercise some amount of control over a variety of laser-plasma instabilities, including forward Raman scattering, electromagnetic cascading, and relativistic self-focusing. Alt
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CHUNG, SUNG HAN. "Wavelength-Preserving Polarization-Insensitive All-Optical 3R Regenerator Based on Self- and Cross-Phase Modulation and Offset Filtering Utilizing Raman Amplification." Thesis, 2009. http://hdl.handle.net/1974/5278.

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Optical regeneration has the potential to significantly increase the reach of long-haul transmission systems. In this thesis, wavelength-preserving polarization-insensitive all-optical 3R regeneration is investigated and demonstrated for 10 and 40 Gb/s signals. The all-optical regenerator utilizes a self-pulsating laser for clock recovery, cross-phase modulation (XPM) based spectral broadening in a highly nonlinear fiber (HNLF) and offset filtering for retiming, and self-phase modulation based spectral broadening in a HNLF and offset filtering for reshaping. Raman amplification is used to incr
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Raghuwanshi, Sanjeev Kumar. "Analytical And Numerical Study Of Propagation In Optical Waveguides And Devices In Linear And Nonlinear Domains." Thesis, 2008. https://etd.iisc.ac.in/handle/2005/782.

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The objective of this thesis is to study of optical effects, arising in the form of non-uniform waveguide structure, complicated refractive index profiles or due to pulse propagation in dense wavelength division multiplexing (DWDM) optical communication systems. These effects are important and critically influence the performance of DWDM optical systems. A comprehensive survey of current literature on optical effects due to nonuniform optical structure and nonlinear optical effects is first done, showing their advantages and disadvantage in optical communication systems. A survey on methods of
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Raghuwanshi, Sanjeev Kumar. "Analytical And Numerical Study Of Propagation In Optical Waveguides And Devices In Linear And Nonlinear Domains." Thesis, 2008. http://hdl.handle.net/2005/782.

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The objective of this thesis is to study of optical effects, arising in the form of non-uniform waveguide structure, complicated refractive index profiles or due to pulse propagation in dense wavelength division multiplexing (DWDM) optical communication systems. These effects are important and critically influence the performance of DWDM optical systems. A comprehensive survey of current literature on optical effects due to nonuniform optical structure and nonlinear optical effects is first done, showing their advantages and disadvantage in optical communication systems. A survey on methods of
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48

Nouroozi, Rahman [Verfasser]. "All optical wavelength conversion and parametric amplification in Ti: PPLN channel waveguides for telecommunication applications / von Rahman Nouroozi." 2010. http://d-nb.info/1010642960/34.

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