Conversion De Lumiere Dans Linfrarouge Moyen Par Amplification Fibree

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Nanomaterials For Energy Conversion And Storage

Author : Dunwei Wang
Publisher : World Scientific
ISBN 13 : 1786343649
Total Pages : 836 pages
Book Rating : 4.7/5 (863 download)

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Book Synopsis Nanomaterials For Energy Conversion And Storage by : Dunwei Wang

Download or read book Nanomaterials For Energy Conversion And Storage written by Dunwei Wang and published by World Scientific. This book was released on 2017-11-10 with total page 836 pages. Available in PDF, EPUB and Kindle. Book excerpt: The use of nanomaterials in energy conversion and storage represents an opportunity to improve the performance, density and ease of transportation in renewable resources. This book looks at the most recent research on the topic, with particular focus on artificial photosynthesis and lithium-ion batteries as the most promising technologies to date. Research on the broad subject of energy conversion and storage calls for expertise from a wide range of backgrounds, from the most fundamental perspectives of the key catalytic processes at the molecular level to device scale engineering and optimization. Although the nature of the processes dictates that electrochemistry is a primary characterization tool, due attention is given to advanced techniques such as synchrotron studies in operando. These studies look at the gap between the performance of current technology and what is needed for the future, for example how to improve on the lithium-ion battery and to go beyond its capabilities.Suitable for students and practitioners in the chemical, electrochemical, and environmental sciences, Nanomaterials for Energy Conversion and Storage provides the information needed to find scalable, economically viable and safe solutions for sustainable energy.

Conversion de lumière dans l'infrarouge-moyen par amplification fibrée

Author : Jean‐Christophe Gauthier
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (137 download)

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Book Synopsis Conversion de lumière dans l'infrarouge-moyen par amplification fibrée by : Jean‐Christophe Gauthier

Download or read book Conversion de lumière dans l'infrarouge-moyen par amplification fibrée written by Jean‐Christophe Gauthier and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Motivé par le fort potentiel scientifique et technologique de l'infrarouge moyen (3-20 μm), le développement de sources lumineuses intenses dans cette région du spectre électromagnétique a subi un essor considérable depuis le début des années 2000. On retrouve maintenant une grande variété de lasers et autres sources pouvant émettre au-delà de 3 μm (lasers à fibres, lasers à cascade quantique, systèmes de conversion paramétrique, lasers à l'état solide, etc). Toutefois, malgré la panoplie d'options ayant émergées pour tester les nouvelles possibilités offertes par l'infrarouge moyen, plusieurs défis restent encore à relever au niveau des sources. Notamment, les enjeux de couverture spectrale, d'efficacité et de simplicité d'utilisation et de fabrication des sources sont encore omniprésents. À titre d'exemple, peu de lasers peuvent produire des impulsions courtes (sub-picosecondes) dans l'infrarouge moyen, et seuls les plus complexes et coûteux d'entre eux peuvent accorder ces impulsions sur une grande plage spectrale, s'accompagnant d'une efficacité énergétique globale très faible. D'autre part, ces problèmes de couverture spectrale, de simplicité et d'efficacité se retrouvent également chez les sources supercontinuum utilisées pour les applications requérant un spectre large couvrant en totalité ou en partie la région de 3 à 5 μm, qui contient de nombreuses résonances moléculaires utiles en spectroscopie (hydrocarbones et oxydes simples). Bien que ces sources produisent un spectre très large à partir d'un système tout fibre et des puissances moyennes pouvant atteindre plusieurs Watts, elles ont le désavantage de générer une grande proportion de leur énergie en-deçà de 3 μm (habituellement entre 40 et 90%), de produire un spectre peu uniforme, et ont beaucoup de difficulté à couvrir la totalité de la fenêtre de 3 à 5 μm. Constatant ces défis, l'objectif global de cette thèse était de faciliter et d'améliorer la conversion et la génération de spectre dans la région de 3 à 5 μm. Comme première contribution de cette thèse, une nouvelle méthode de génération de supercontinuum a été démontrée, permettant la création d'un spectre plat allant de 2.6 à 4.1 μm à partir d'un système simple et produisant jusqu'à 82% de l'énergie spectrale au-delà de 3 μm (Chapitre 2). En poursuivant avec cette approche, il a été possible d'établir un record pour le supercontinuum le plus large généré dans une fibre de fluoroindate (InF3), allant de 2.4 à 5.4 μm (Chapitre 3). Les chapitres 4 et 5 avaient pour objectif d'approfondir notre connaissance et d'optimiser les paramètres expérimentaux de cette technique. Finalement, la contribution présentée dans le chapitre 6 a permis de s'attaquer au problème de la disponibilité d'impulsions brèves et accordables dans l'infrarouge moyen à partir de sources plus abordables et pratiques à utiliser que les chaînes lasers à conversion paramétrique. Pour ce faire, nous avons utilisé les phénomènes de fission solitonique et d'autodécalage Raman afin de décaler spectralement et de manière contrôlée des impulsions femtosecondes entre 2.8 μm et 4.8 μm, le tout à partir d'un système fibré.

Organic Solid-State Lasers

Author : Sébastien Forget
Publisher : Springer
ISBN 13 : 3642367054
Total Pages : 179 pages
Book Rating : 4.6/5 (423 download)

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Book Synopsis Organic Solid-State Lasers by : Sébastien Forget

Download or read book Organic Solid-State Lasers written by Sébastien Forget and published by Springer. This book was released on 2013-07-03 with total page 179 pages. Available in PDF, EPUB and Kindle. Book excerpt: Organic lasers are broadly tunable coherent sources, potentially compact, convenient and manufactured at low-costs. Appeared in the mid 60’s as solid-state alternatives for liquid dye lasers, they recently gained a new dimension after the demonstration of organic semiconductor lasers in the 90's. More recently, new perspectives appeared at the nanoscale, with organic polariton and surface plasmon lasers. After a brief reminder to laser physics, a first chapter exposes what makes organic solid-state organic lasers specific. The laser architectures used in organic lasers are then reviewed, with a state-of-the-art review of the performances of devices with regard to output power, threshold, lifetime, beam quality etc. A survey of the recent trends in the field is given, highlighting the latest developments with a special focus on the challenges remaining for achieving direct electrical pumping of organic semiconductor lasers. A last chapter covers the applications of organic solid-state lasers.

Critical Technologies Plan

Author :
Publisher :
ISBN 13 :
Total Pages : 160 pages
Book Rating : 4.:/5 (31 download)

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Book Synopsis Critical Technologies Plan by :

Download or read book Critical Technologies Plan written by and published by . This book was released on 1989 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Review of Research on Laterites

Author : Roger Maignien
Publisher :
ISBN 13 :
Total Pages : 168 pages
Book Rating : 4.:/5 (318 download)

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Book Synopsis Review of Research on Laterites by : Roger Maignien

Download or read book Review of Research on Laterites written by Roger Maignien and published by . This book was released on 1966 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt: Background, definition and scope of the problem; Morphological and analytical characteristics of laterites; Global distribution of laterites; Origin of laterites; Classification of laterites.

Light Filaments

Author : Jean-Claude Diels
Publisher : IET
ISBN 13 : 1785612409
Total Pages : 391 pages
Book Rating : 4.7/5 (856 download)

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Book Synopsis Light Filaments by : Jean-Claude Diels

Download or read book Light Filaments written by Jean-Claude Diels and published by IET. This book was released on 2022 with total page 391 pages. Available in PDF, EPUB and Kindle. Book excerpt: This edited volume starts with tutorials about the science of filamentation before presenting in-depth chapters on the latest research, technologies and applications. It cover wide aspects of light filaments considering various mediums of propagation, with structured or single filaments, and filaments of different colours, as well as combined filaments. It also includes a wide range of applications from strong field ionisation and molecular properties to laser development and beam shaping, THz, lasing in air and supercontinuum generation.

Laser: 50 Years Of Discoveries

Author : Fabien Bretenaker
Publisher : World Scientific
ISBN 13 : 9814612421
Total Pages : 185 pages
Book Rating : 4.8/5 (146 download)

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Book Synopsis Laser: 50 Years Of Discoveries by : Fabien Bretenaker

Download or read book Laser: 50 Years Of Discoveries written by Fabien Bretenaker and published by World Scientific. This book was released on 2014-10-27 with total page 185 pages. Available in PDF, EPUB and Kindle. Book excerpt: This unique book provides an overview of the principle and applications of lasers enriched with numerous illustrations.Being over fifty years old, lasers continue to amaze us. Their performance characteristics are constantly reaching new limits, and the scope of their applications continues to expand. Yet, it took years of effort by teams of physicists to transform the fundamental notions of Einstein into the first experimental beam of laser light. And history is still going on as fundamental research is now triggered by its remarkable properties.This book addresses every aspects of laser light, from its fundamental principles to its industrial applications, at a level particularly suited for high school teachers, students, and anybody curious about science and technology.

Insects as Sustainable Food Ingredients

Author : Aaron T. Dossey
Publisher : Academic Press
ISBN 13 : 0128028920
Total Pages : 404 pages
Book Rating : 4.1/5 (28 download)

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Book Synopsis Insects as Sustainable Food Ingredients by : Aaron T. Dossey

Download or read book Insects as Sustainable Food Ingredients written by Aaron T. Dossey and published by Academic Press. This book was released on 2016-06-23 with total page 404 pages. Available in PDF, EPUB and Kindle. Book excerpt: Insects as Sustainable Food Ingredients: Production, Processing and Food Applications describes how insects can be mass produced and incorporated into our food supply at an industrial and cost-effective scale, providing valuable guidance on how to build the insect-based agriculture and the food and biomaterial industry. Editor Aaron Dossey, a pioneer in the processing of insects for human consumption, brings together a team of international experts who effectively summarize the current state-of-the-art, providing helpful recommendations on which readers can build companies, products, and research programs. Researchers, entrepreneurs, farmers, policymakers, and anyone interested in insect mass production and the industrial use of insects will benefit from the content in this comprehensive reference. The book contains all the information a basic practitioner in the field needs, making this a useful resource for those writing a grant, a research or review article, a press article, or news clip, or for those deciding how to enter the world of insect based food ingredients. Details the current state and future direction of insects as a sustainable source of protein, food, feed, medicine, and other useful biomaterials Provides valuable guidance that is useful to anyone interested in utilizing insects as food ingredients Presents insects as an alternative protein/nutrient source that is ideal for food companies, nutritionists, entomologists, food entrepreneurs, and athletes, etc. Summarizes the current state-of-the-art, providing helpful recommendations on building companies, products, and research programs Ideal reference for researchers, entrepreneurs, farmers, policymakers, and anyone interested in insect mass production and the industrial use of insects Outlines the challenges and opportunities within this emerging industry

Diffusion in Materials - DIMAT 2011

Author : I. Bezverkhyy
Publisher :
ISBN 13 : 9783037853979
Total Pages : 0 pages
Book Rating : 4.8/5 (539 download)

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Book Synopsis Diffusion in Materials - DIMAT 2011 by : I. Bezverkhyy

Download or read book Diffusion in Materials - DIMAT 2011 written by I. Bezverkhyy and published by . This book was released on 2012 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The International Conference on Diffusion in Materials (DIMAT) is the benchmark conference series for diffusion in solids. DIMAT 2011 was organized by the University of Bourgogne in association with CNRS, Dijon (France). The conference showcased new results concerning theoretical tools as well as applied research approaches. Diffusion processes affect all types of materials: nanomaterials, materials for energy, metallurgy, glasses and ceramics, but each requires its own numerical tools.Volume is indexed by Thomson Reuters CPCI-S (WoS). This volume comprises most of the contributions presented at DIMAT 2011: 4 plenary lectures delivered by famous high-level scientists plus 88 contributions in the form of keynote lectures, talks and posters.

Fourteen Weeks in Chemistry

Author : Joel Dorman Steele
Publisher :
ISBN 13 :
Total Pages : 298 pages
Book Rating : 4.M/5 ( download)

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Book Synopsis Fourteen Weeks in Chemistry by : Joel Dorman Steele

Download or read book Fourteen Weeks in Chemistry written by Joel Dorman Steele and published by . This book was released on 1873 with total page 298 pages. Available in PDF, EPUB and Kindle. Book excerpt:

ZnO Thin Films

Author : Paolo Mele
Publisher :
ISBN 13 : 9781536160864
Total Pages : 0 pages
Book Rating : 4.1/5 (68 download)

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Book Synopsis ZnO Thin Films by : Paolo Mele

Download or read book ZnO Thin Films written by Paolo Mele and published by . This book was released on 2019 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Zinc oxide (ZnO) is an n-type semiconductor with versatile applications such as optical devices in ultraviolet region, piezoelectric transducers, transparent electrode for solar cells and gas sensors. This book "ZnO Thin Films: Properties, Performance and Applications" gives a deep insight in the intriguing science of zinc oxide thin films. It is devoted to cover the most recent advances and reviews the state of the art of ZnO thin films applications involving energy harvesting, microelectronics, magnetic devices, photocatalysis, photovoltaics, optics, thermoelectricity, piezoelectricity, electrochemistry, temperature sensing. It serves as a fundamental information source on the techniques and methodologies involved in zinc oxide thin films growth, characterization, post-deposition plasma treatments and device processing. This book will be invaluable to the experts to consolidate their knowledge and provide insight and inspiration to beginners wishing to learn about zinc oxide thin films.

Arnold O. Beckman

Author : Arnold Thackray
Publisher : Chemical Heritage Foundation
ISBN 13 : 9780941901239
Total Pages : 404 pages
Book Rating : 4.9/5 (12 download)

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Book Synopsis Arnold O. Beckman by : Arnold Thackray

Download or read book Arnold O. Beckman written by Arnold Thackray and published by Chemical Heritage Foundation. This book was released on 2000 with total page 404 pages. Available in PDF, EPUB and Kindle. Book excerpt: Arnold O. Beckman was a legend in his time: the blacksmith's son who grew up to play a pivotal role in the instrumentation revolution that dramatically changed science, technology, and society. From his rural boyhood world of farming and woodworking, through his service in the U.S. Marines and his appointment to the Caltech faculty, to his path-breaking creation of the pH meter, the DU spectrophotometer, and the establishment of the Beckman Instruments company, this work portrays an individual whose ingenuity and integrity made him a scientific leader and industrial pioneer. It also discusses his role in California and national politics, and his career as a major philanthropist. Arnold Beckman's story is inseparable from that of the 20th century--a very inspiring read. Included with this biography is a video portrait of Arnold Beckman, in CD-ROM format for both PC and Mac. You will see and hear Dr. Beckman talk about his early life, his marriage to Mabel, and his philosophies of inventing, education, and philanthropy. The CD-ROM was produced by Jeffrey I. Seeman.

Why Not Eat Insects?

Author : Vincent M. Holt
Publisher :
ISBN 13 :
Total Pages : 108 pages
Book Rating : 4.R/5 ( download)

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Book Synopsis Why Not Eat Insects? by : Vincent M. Holt

Download or read book Why Not Eat Insects? written by Vincent M. Holt and published by . This book was released on 1885 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Drug Discovery

Author : Walter Sneader
Publisher : John Wiley & Sons
ISBN 13 : 0470015527
Total Pages : 472 pages
Book Rating : 4.4/5 (7 download)

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Book Synopsis Drug Discovery by : Walter Sneader

Download or read book Drug Discovery written by Walter Sneader and published by John Wiley & Sons. This book was released on 2005-10-31 with total page 472 pages. Available in PDF, EPUB and Kindle. Book excerpt: Written by a leading authority with an excellent reputation and ability for writing a good narrative, Drug Discovery: A History is a far cry from simply a list of chemical structures. This lively new text considers the origins, development and history of medicines that generate high media interest and have a huge social and economic impact on society. Set within a wide historical, social and cultural context, it provides expanded coverage of pre-twentieth century drugs, the huge advances made in the twentieth century and the latest developments in drug research. Hallmark features: Up-to-the-minute information in drug research Vignettes of special and unusual information, and anecdotes Discusses drug prototypes from all sources More comprehensive than other volumes on history of drug discovery From the reviews: "...an excellent bibliographic resource for those interested in the background papers that serve as the foundation for discovery of specific drug entities." JOURNAL OF MEDICAL CHEMISTRY, June 2006 "...a very comprehensive overview of drug development. It should be on the shelf on any aspiring pharmacist, medicinal chemist, or person interested in the history of therapeutic agents." JOURNAL OF CHEMICAL EDUCATION, February 2006 "...a very readable and closely researched book..." CHEMISTRY & INDUSTRY, October 2005

Fundamentals of Photocatalysis

Author : Orva Auger
Publisher :
ISBN 13 : 9781685073749
Total Pages : 0 pages
Book Rating : 4.0/5 (737 download)

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Book Synopsis Fundamentals of Photocatalysis by : Orva Auger

Download or read book Fundamentals of Photocatalysis written by Orva Auger and published by . This book was released on 2021-12-06 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: In chemistry, photocatalysis refers to the acceleration of a photoreaction in the presence of a catalyst. Various aspects and applications of this process are described in the six chapters of this book. Chapter One addresses the reduction and oxidation of heavy metals by the photocatalytic process to produce less toxic forms, thus reducing pollution. Chapter Two reviews some issues of photocatalytic reactions which may have been overlooked in other reports. Chapter Three deals with the utilisation of ZnO-CdO nanoblocks as adsorbent and efficient solar photocatalysts towards brilliant cresol blue degradation. Chapter Four explains heterogeneous photocatalysis through the use of titanium and tungsten oxide nanostructures. Chapter Five reports the fabrication and evaluation of TiO2 nanowires supported on graphene and sensitised with Ag in a unique hierarchical three-dimensional sandwich structure. Lastly, Chapter Six provides an overview of recent achievements in C-N bond formation reactions triggered by visible light-induced DDQ-photoredox catalysis.

Etude de la conversion de fréquence par amplification paramètrique dans les fibres optiques transparentes dans l'infrarouge

Author : Claire Alhenc-Gelas
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (8 download)

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Book Synopsis Etude de la conversion de fréquence par amplification paramètrique dans les fibres optiques transparentes dans l'infrarouge by : Claire Alhenc-Gelas

Download or read book Etude de la conversion de fréquence par amplification paramètrique dans les fibres optiques transparentes dans l'infrarouge written by Claire Alhenc-Gelas and published by . This book was released on 2012 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: De nombreuses applications militaires ou civiles, telles que la spectroscopie dans les bandes de transmission de l'atmosphère (bandes 3-5μm et 8-12μm), nécessitent de disposer de sources émettant dans le moyen infrarouge (IR). Les travaux de cette thèse portent sur la génération de rayonnement dans la bande 3-5μm par amplification paramétrique (mélange à quatre ondes) dans les fibres optiques en verres fluorés et en verres de chalcogénures. La première partie de ce travail a été consacrée à l'étude théorique et à la modélisation des conditions d'accord de phase et du gain paramétrique dans des fibres à saut d'indice monomodes en verres fluorés ZBLAN et verres de chalcogénures As2S3 et As2Se3. La nature des résultats obtenus nous a conduit à étudier théoriquement le potentiel de l'accord de phase multimode dans les fibres en verres de chalcogénures. La deuxième partie de ce travail a porté sur la modélisation de l'amplification paramétrique dans des fibres en verres de chalcogénures microstructurées à géométrie hexagonale. Pour ce faire, un modèle simplifié de la propagation dans les fibres microstructurées hexagonales a été développé : le modèle de l'indice effectif de gaine (EIM). Il a ensuite été comparé à une méthode de résolution aux éléments finis. Grâce à cette comparaison, nous avons pu améliorer la précision du modèle EIM en déterminant la valeur de plusieurs paramètres empiriques. Ce modèle nous a alors permis de prédire l'efficacité du processus d'amplification paramétrique dans les fibres microstructurées. L'ensemble de ces études théoriques a permis d'identifier les fibres les plus adaptées à la conversion de fréquence vers la bande 3-5μm. Enfin, nous avons réalisé un banc de mesure de la dispersion chromatique des fibres, ainsi que le dimensionnement d'un convertisseur de fréquence utilisant les fibres identifiées dans l'étude théorique.