Download or read book Mise en op ration d une source picoseconde de rayonnement infrarouge lointain ressource lectronique written by Rivière, Christophe and published by Québec : Université Laval. This book was released on 1999 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Les propriétés non linéaires des matériaux dans la gamme infrarouge lointain ont été relativement peu étudiées. Ce phénomène est dû à l'absence, jusqu'à tout récemment, de sources dans cette gamme qui soient à la fois cohérentes et intenses. Certains lasers moléculaires et les lasers à électrons libres ont permis de pallier ce manque. Cependant ces sources sont soit difficilement accordables, soit très onéreuses et volumineuses. Nous présentons ici une source dite optoélectronique qui est cohérente, potentiellement accordable entre 17 et 600 æm, intense, peu volumineuse et peu coûteuse. La première partie du projet a consisté à développer l'aspect d'accordabilité de la source au moyen du battement entre deux faisceaux laser. Nous avons montré qu'une méthode de réinjection de photons cohérents permettait d'augmenter significativement le contraste de battements de fréquence entre 0.5 et plus de 15 THz. Ces battements ont ensuite été amplifiés et utilisés pour générer un rayonnement infrarouge lointain à 180 et 510 æm avec une énergie de 0.4 æJ.
Download or read book Mise en op ration d une source picoseconde de rayonnement infrarouge lointain microforme written by Christophe Rivière and published by National Library of Canada = Bibliothèque nationale du Canada. This book was released on 1999 with total page 188 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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.
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.
Download or read book Physical Properties of Amorphous Materials written by David Adler and published by Springer Science & Business Media. This book was released on 2013-06-29 with total page 448 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Institute for Amorphous Studies was founded in 1982 as the international center for the investigation of amorphous mate rials. It has since played an important role in promoting the und er standing of disordered matter in general. An Institute lecture series on "Fundamentals of Amorphous Materials and Devices" was held during 1982-83 with distinguished speakers from universities and industry. These events were free and open to the public ,and were attended by many representatives of the scientific community. The lectures themselves were highly successful inasmuch as they provided not only formal instruction but also an opportunity for vigorous and stimulating debate. That last element could not be captured within the pages of a book I but the lectures concentrated on the latest advances in the field I which is why their essential contents are he re reproduced in collective form. Together they constitute an interdisciplinary status report of the field. The speakers brought many different viewpoints and a variety of back ground experiences io bear on the problems involved I but though language and conventions vary I the essential unity of the concerns is very clear I as indeed are the ultimate benefits of the many-sided approach.
