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Laser Stabilise En Frequence Sur Une Cavite Fabry Perot A Tres Basse Temperature
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Book Synopsis Laser stabilisé en fréquence sur une cavité Fabry-Pérot à très basse température by : Santerelli Falzon Tetsing Talla
Download or read book Laser stabilisé en fréquence sur une cavité Fabry-Pérot à très basse température written by Santerelli Falzon Tetsing Talla and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nous présentons dans cette thèse le développement d'un laser stabilisé en fréquence sur une cavité Fabry-Pérot à très basse température. Nous avons utilisé une cavité optique conçue à partir d'un bloc de silicium, portée à une température de 18.1 K. Un cryogénérateur à faibles vibrations à tube pulsé est utilisé pour refroidir la cavité autour de la température optimale souhaitée. Le fait de travailler à cette température où le coefficient de dilatation thermique est faible, et la réduction des contraintes mécaniques agissant sur la cavité, offrent la possibilité d'atteindre des performances du laser stabilisé en dessous de 1 × 10^{-16} sur des temps courts, pour répondre aux besoins des horloges optiques. Notre système est constitué d'un laser fibré à 1542 nm, dont la fréquence est asservie sur la fréquence d'un mode de résonance de la cavité, via la technique Pound-Drever-Hall. Cette cavité fait 14 cm de longueur et un revêtement diélectrique a été déposé sur le substrat des miroirs. Dans ces travaux, nous avons également mis en place un système de contrôle de la modulation d'amplitude résiduelle, qui fait partie des principales limitations des performances du laser ultra-stable. Pour cette cavité, on montre également que la limite théorique, fixée par le bruit thermique de la cavité et évaluée en terme de stabilité relative de fréquence, est d'environ 3 × 10^{-17} @ 1 s.
Book Synopsis Stabilisation en fréquence de diodes lasers par couplage optique résonant sur une cavité Fabry-Pérot confocale by : Philippe Laurent
Download or read book Stabilisation en fréquence de diodes lasers par couplage optique résonant sur une cavité Fabry-Pérot confocale written by Philippe Laurent and published by . This book was released on 1989 with total page 380 pages. Available in PDF, EPUB and Kindle. Book excerpt: We report our work on diode laser frequency stabilization emitting near 850 and 1300 nanometers.In first, we demonstrate a single-mode operation from an initially multimode diode laser with an optical feedback on an external mirror.Secondly, a confocal Fabry-Perot cavity is used to feedback the beam from the diode laser and provide resonant optical stabilization of the semiconductor laser. We present a detailed theoretical analysis of the static and dynamic frequency noise power spectrum of the coupled cavity laser field. Experimentally we achieve static frequency noise reduction of 50-60 dB and obtain a dramatic reduction of the laser line with from 20 MHz to a few kHz.The frequency tenability of these coupled cavity diode lasers are achieved by a double servo-loop system and we have obtained a continuously frequency tuning of 7 GHz without laser spectral purity degradation.Applications of these techniques include optical pumping Cesium docks and frequency synthesis in the visible.
Author :North Atlantic Treaty Organization. Advisory Group for Aerospace Research and Development. Fluid Dynamics Panel. Symposium Publisher : ISBN 13 : Total Pages :444 pages Book Rating :4.E/5 ( download)
Book Synopsis Advanced Aerodynamic Measurement Technology by : North Atlantic Treaty Organization. Advisory Group for Aerospace Research and Development. Fluid Dynamics Panel. Symposium
Download or read book Advanced Aerodynamic Measurement Technology written by North Atlantic Treaty Organization. Advisory Group for Aerospace Research and Development. Fluid Dynamics Panel. Symposium and published by . This book was released on 1998 with total page 444 pages. Available in PDF, EPUB and Kindle. Book excerpt: The demands for higher performance for modern aircraft have led the wind tunnel community, which is an integral link in the design process, to develop more refined and cost effective measuring techniques. These technologies have gradually matured from laboratory novelties into instruments regularly used in aerodynamic testing. The development of these modern measurement techniques has greatly extended the capability and accuracy of the classical methods for measurement techniques and provided better insight into flow physics. This Symposium provided a forum for active researchers to address the state-of-the-art, to exchange experiences and ideas, and for the practitioners to obtain an overview of the technology and learn how to appy it.
Book Synopsis STABILISATION ET FREQUENCE DU LASER ET CONTROLE DE CAVITES OPTIQUES A MIROIRS SUSPENDUS POUR LE DETECTEUR INTERFENOMETRIQUE D'ONDES GRAVITATIONNELLES VIRGO by : MATTEO.. BARSUGLIA
Download or read book STABILISATION ET FREQUENCE DU LASER ET CONTROLE DE CAVITES OPTIQUES A MIROIRS SUSPENDUS POUR LE DETECTEUR INTERFENOMETRIQUE D'ONDES GRAVITATIONNELLES VIRGO written by MATTEO.. BARSUGLIA and published by . This book was released on 1999 with total page 210 pages. Available in PDF, EPUB and Kindle. Book excerpt: LE DETECTEUR VIRGO, CONSTITUE D'UN INTERFEROMETRE AVEC DES CAVITES FABRY-PEROT DE 3 KM DANS LES BRAS, A POUR BUT LA DETECTION DU RAYONNEMENT GRAVITATIONNEL EMIS PAR DES SOURCES ASTROPHYSIQUES. CETTE THESE EST CONSTITUEE DE DEUX PARTIES INDEPENDANTES. LA PREMIERE TRAITE DE LA STABILISATION EN FREQUENCE DU LASER. LA SECONDE EST CONSACREE A L'ETUDE D'UNE CAVITE OPTIQUE SUSPENDUE. NOUS EVALUONS L'INFLUENCE DES FLUCTUATIONS DE FREQUENCE DU LASER SUR LA SENSIBILITE DE VIRGO ET NOUS METTONS EN EVIDENCE L'IMPORTANCE DU TERME D'ASYMETRIE DE REFLECTIVITE ENTRE LES DEUX CAVITES FABRY-PEROT KILOMETRIQUES, JUSQU'A PRESENT NEGLIGE. NOUS ETUDIONS LA STABILISATION DE FREQUENCE SUR L'INTERFEROMETRE CONSIDERE COMME UN ETALON ULTRA-STABLE, NOUS EVALUONS LE BRUIT DES DIFFERENTS SIGNAUX ENVISAGES POUR LA STABILISATION ET NOUS DISCUTONS UNE STRATEGIE DE CONTROLE. NOUS ETUDIONS UN PROTOTYPE DU MODE-CLEANER DE VIRGO, CONSTITUE D'UNE CAVITE TRIANGULAIRE SUSPENDUE DE 30 M, POUR LEQUEL NOUS AVONS DEVELOPPE UN ASSERVISSEMENT NOUS AYANT PERMIS DE LE MAINTENIR EN RESONANCE. ENFIN, NOUS CARACTERISONS CETTE CAVITE EN TERMES DE SPECTRES DE MODES, FINESSE ET FONCTIONS DE TRANSFERT MECANIQUES.
Book Synopsis Quantum Mechanics, Volume 3 by : Claude Cohen-Tannoudji
Download or read book Quantum Mechanics, Volume 3 written by Claude Cohen-Tannoudji and published by John Wiley & Sons. This book was released on 2019-12-16 with total page 790 pages. Available in PDF, EPUB and Kindle. Book excerpt: This new, third volume of Cohen-Tannoudji's groundbreaking textbook covers advanced topics of quantum mechanics such as uncorrelated and correlated identical particles, the quantum theory of the electromagnetic field, absorption, emission and scattering of photons by atoms, and quantum entanglement. Written in a didactically unrivalled manner, the textbook explains the fundamental concepts in seven chapters which are elaborated in accompanying complements that provide more detailed discussions, examples and applications. * Completing the success story: the third and final volume of the quantum mechanics textbook written by 1997 Nobel laureate Claude Cohen-Tannoudji and his colleagues Bernard Diu and Franck Laloë * As easily comprehensible as possible: all steps of the physical background and its mathematical representation are spelled out explicitly * Comprehensive: in addition to the fundamentals themselves, the books comes with a wealth of elaborately explained examples and applications Claude Cohen-Tannoudji was a researcher at the Kastler-Brossel laboratory of the Ecole Normale Supérieure in Paris where he also studied and received his PhD in 1962. In 1973 he became Professor of atomic and molecular physics at the Collège des France. His main research interests were optical pumping, quantum optics and atom-photon interactions. In 1997, Claude Cohen-Tannoudji, together with Steven Chu and William D. Phillips, was awarded the Nobel Prize in Physics for his research on laser cooling and trapping of neutral atoms. Bernard Diu was Professor at the Denis Diderot University (Paris VII). He was engaged in research at the Laboratory of Theoretical Physics and High Energy where his focus was on strong interactions physics and statistical mechanics. Franck Laloë was a researcher at the Kastler-Brossel laboratory of the Ecole Normale Supérieure in Paris. His first assignment was with the University of Paris VI before he was appointed to the CNRS, the French National Research Center. His research was focused on optical pumping, statistical mechanics of quantum gases, musical acoustics and the foundations of quantum mechanics.
Book Synopsis Coherent Optical Fiber Communications by : T. Okoshi
Download or read book Coherent Optical Fiber Communications written by T. Okoshi and published by Springer Science & Business Media. This book was released on 1988-07-31 with total page 302 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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.
Book Synopsis Phase Noise and Frequency Stability in Oscillators by : Enrico Rubiola
Download or read book Phase Noise and Frequency Stability in Oscillators written by Enrico Rubiola and published by Cambridge University Press. This book was released on 2010-06-10 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Presenting a comprehensive account of oscillator phase noise and frequency stability, this practical text is both mathematically rigorous and accessible. An in-depth treatment of the noise mechanism is given, describing the oscillator as a physical system, and showing that simple general laws govern the stability of a large variety of oscillators differing in technology and frequency range. Inevitably, special attention is given to amplifiers, resonators, delay lines, feedback, and flicker (1/f) noise. The reverse engineering of oscillators based on phase-noise spectra is also covered, and end-of-chapter exercises are given. Uniquely, numerous practical examples are presented, including case studies taken from laboratory prototypes and commercial oscillators, which allow the oscillator internal design to be understood by analyzing its phase-noise spectrum. Based on tutorials given by the author at the Jet Propulsion Laboratory, international IEEE meetings, and in industry, this is a useful reference for academic researchers, industry practitioners, and graduate students in RF engineering and communications engineering.
Book Synopsis Fundamentals of Industrial Electronics by : Bogdan M. Wilamowski
Download or read book Fundamentals of Industrial Electronics written by Bogdan M. Wilamowski and published by CRC Press. This book was released on 2011-03-04 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Industrial Electronics Handbook, Second Edition combines traditional and newer, more specialized knowledge that will help industrial electronics engineers develop practical solutions for the design and implementation of high-power applications. Embracing the broad technological scope of the field, this collection explores fundamental areas, including analog and digital circuits, electronics, electromagnetic machines, signal processing, and industrial control and communications systems. It also facilitates the use of intelligent systems—such as neural networks, fuzzy systems, and evolutionary methods—in terms of a hierarchical structure that makes factory control and supervision more efficient by addressing the needs of all production components. Enhancing its value, this fully updated collection presents research and global trends as published in the IEEE Transactions on Industrial Electronics Journal, one of the largest and most respected publications in the field. Fundamentals of Industrial Electronics covers the essential areas that form the basis for the field. This volume presents the basic knowledge that can be applied to the other sections of the handbook. Topics covered include: Circuits and signals Devices Digital circuits Digital and analog signal processing Electromagnetics Other volumes in the set: Power Electronics and Motor Drives Control and Mechatronics Industrial Communication Systems Intelligent Systems
Book Synopsis Quantum Transport by : Yuli V. Nazarov
Download or read book Quantum Transport written by Yuli V. Nazarov and published by Cambridge University Press. This book was released on 2009-05-28 with total page 1 pages. Available in PDF, EPUB and Kindle. Book excerpt: Quantum transport is a diverse field, sometimes combining seemingly contradicting concepts - quantum and classical, conduction and insulating - within a single nanodevice. Quantum transport is an essential and challenging part of nanoscience, and understanding its concepts and methods is vital to the successful fabrication of devices at the nanoscale. This textbook is a comprehensive introduction to the rapidly developing field of quantum transport. The authors present the comprehensive theoretical background, and explore the groundbreaking experiments that laid the foundations of the field. Ideal for graduate students, each section contains control questions and exercises to check readers' understanding of the topics covered. Its broad scope and in-depth analysis of selected topics will appeal to researchers and professionals working in nanoscience.
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.
Book Synopsis Ultra Wide Band Antennas by : Xavier Begaud
Download or read book Ultra Wide Band Antennas written by Xavier Begaud and published by John Wiley & Sons. This book was released on 2013-03-04 with total page 217 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ultra Wide Band Technology (UWB) has reached a level of maturity that allows us to offer wireless links with either high or low data rates. These wireless links are frequently associated with a location capability for which ultimate accuracy varies with the inverse of the frequency bandwidth. Using time or frequency domain waveforms, they are currently the subject of international standards facilitating their commercial implementation. Drawing up a complete state of the art, Ultra Wide Band Antennas is aimed at students, engineers and researchers and presents a summary of internationally recognized studies.
Download or read book MIMO written by Alain Sibille and published by Academic Press. This book was released on 2010-12-03 with total page 385 pages. Available in PDF, EPUB and Kindle. Book excerpt: Foreword from Arogyaswami Paulraj, Professor (Emeritus), Stanford University (USA) - The first book to show how MIMO principles can be implemented in today's mobile broadband networks and components - Explains and solves some of the practical difficulties that arise in designing and implementing MIMO systems - Both theory and implementation sections are written in the context of the most recent standards: IEEE 802.11n (WiFi); IEEE 802.16 (WIMAX); 4G networks (3GPP/3GPP2, LTE)
Book Synopsis Experimental Chaos by : Stefano Boccaletti
Download or read book Experimental Chaos written by Stefano Boccaletti and published by A I P Press. This book was released on 2004-12-14 with total page 384 pages. Available in PDF, EPUB and Kindle. Book excerpt: The 8th Experimental Chaos Conference again demonstrated the broad spectrum of areas where nonlinear dynamics plays an important role, such as circuits, hydrodynamics, optics, chemistry, fracture dynamics, neuroscience, and cognitive science. Additional contributions outline the trends for development and application of concepts and techniques of nonlinear dynamics.
Book Synopsis Quantum Theory of Finite Systems by : Jean-Paul Blaizot
Download or read book Quantum Theory of Finite Systems written by Jean-Paul Blaizot and published by Mit Press. This book was released on 1986 with total page 657 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a comprehensive and pedagogical account of the various methods used in the quantum theory of finite systems, including molecular, atomic, nuclear, and particle phenomena. Covering both background material and advanced topics and including nearly 200 problems, Quantum Theory of Finite Systems has been designed to serve primarily as a text and will also prove useful as a reference in research. The first of the book's four parts introduces the basic mathematical apparatus: second quantization, canonical transformations, Wick theorems and the resulting diagram expansions, and oscillator models. The second part presents mean field approximations and the recently developed path integral methods for the quantization of collective modes. Part three develops perturbation theory in terms of both time-dependent Feynman diagrams and time-independent Goldstone diagrams. A fourth part discusses variational methods based on correlated wavefunctions, including spin correlations. The approximation schemes are formulated for fermions and bosons at eigher zero or non-zero temperature. Although the formalism developed applies to both finite and infinite systems, the book stresses those aspects of the theory that are specific to the description of finite systems. Thus special attention is given to mean field approximations, the ensuing broken symmetries, and the associated collective motions such as rotations. Conversely, some specific features of systems with infinite numbers of degrees of freedom (such as the thermodynamic limit, critical phenomena, and the elimination of ultraviolet divergencies) are deliberately omitted. Jean-Paul Blaizot and Georges Ripka are associated with the Centre d'Etudes Nucleaires de Saclay.
Book Synopsis Pervasive Mobile and Ambient Wireless Communications by : Roberto Verdone
Download or read book Pervasive Mobile and Ambient Wireless Communications written by Roberto Verdone and published by Springer Science & Business Media. This book was released on 2012-01-02 with total page 696 pages. Available in PDF, EPUB and Kindle. Book excerpt: Reporting the findings of COST 2100, a major European intergovernmental project, this volume offers system designers a good source of guidelines based on channel characterization and measurement-based modeling, as well as worthwhile ideas for future research.
Book Synopsis Cavity Optomechanics by : Markus Aspelmeyer
Download or read book Cavity Optomechanics written by Markus Aspelmeyer and published by Springer. This book was released on 2014-07-05 with total page 358 pages. Available in PDF, EPUB and Kindle. Book excerpt: During the last few years cavity-optomechanics has emerged as a new field of research. This highly interdisciplinary field studies the interaction between micro and nano mechanical systems and light. Possible applications range from novel high-bandwidth mechanical sensing devices through the generation of squeezed optical or mechanical states to even tests of quantum theory itself. This is one of the first books in this relatively young field. It is aimed at scientists, engineers and students who want to obtain a concise introduction to the state of the art in the field of cavity optomechanics. It is valuable to researchers in nano science, quantum optics, quantum information, gravitational wave detection and other cutting edge fields. Possible applications include biological sensing, frequency comb applications, silicon photonics etc. The technical content will be accessible to those who have familiarity with basic undergraduate physics.
