CONCEPTION ET REALISATION D'AMPLIFICATEURS OPTIQUES A SEMI-CONDUCTEUR INDEPENDANT DE LA POLARISATION PDF Download
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Author: BOUMEDIENNE.. MERSALI
Publisher:
ISBN:
Category :
Languages : fr
Pages :
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Book Description
NOUS PRESENTONS DANS CETTE THESE, L'ETUDE ET LA REALISATION D'AMPLIFICATEURS OPTIQUES A SEMI-CONDUCTEURS (AOSC), DESTINES A ETRE UTILISES COMME REPETEURS DANS LES SYSTEMES DE TELECOMMUNICATION PAR FIBRE OPTIQUE MONOMODE AFIN DE COMPENSER LES PERTES EN LIGNES DUES A L'ATTENUATION INTRINSEQUE DE LA FIBRE. LE MEMOIRE DE THESE COMPREND TROIS PARTIES: DANS LA PREMIERE PARTIE, NOUS AVONS RESUME LES PRINCIPALES CARACTERISTIQUES DES AOSC EN INSISTANT TOUT PARTICULIEREMENT SUR L'INSENSIBILITE A LA POLARISATION QUI EST L'UNE DES PRINCIPALES EXIGENCES DES APPLICATIONS SYSTEMES. NOUS DISCUTONS LES CHOIX ADOPTES CONCERNANT LA STRUCTURE TECHNOLOGIQUE DES AOSC. DANS LA SECONDE PARTIE, NOUS PRESENTONS LES DIFFERENTES METHODES PERMETTANT DE S'AFFRANCHIR DE L'EFFET DE CAVITE PEROT-FABRY DES AOSC. NOUS METTONS L'ACCENT SUR LE DEVELOPPEMENT DES TRAITEMENTS ANTIREFLET, CES DERNIERS ETANT NECESSAIRES A LA REALISATION D'AOSC QUELLES QUE SOIENT LES SOLUTIONS TECHNOLOGIQUES CHOISIES PAR AILLEURS. DANS LA DERNIERE PARTIE, NOUS PRESENTONS LES BANCS DE CARACTERISTION MIS AU POINT AU COURS DE CETTE THESE AINSI QUE LES PRINCIPAUX RESULTATS EXPERIMENTAUX OBTENUS. PARMI CEUX-CI, NOTONS LA REALISATION D'AOSC INSENSIBLES A LA POLARISATION PRESENTANT UN GAIN SIMPLE PASSAGE ELEVE (25 A 30 DB) POUR UN COURANT D'INJECTION DE SEULEMENT 50 MA. CES RESULTATS ONT ETE OBTENUS GRACE A LA REALISATION DE COEFFICIENTS DE REFLEXION INFERIEURS A 1.10##4 SIMULTANEMENT SUR LES MODES TE ET TM EN UTILISANT UN ANTIREFLET BICOUCHE DE TYPE TIO#2/SIO#2
Author: BOUMEDIENNE.. MERSALI
Publisher:
ISBN:
Category :
Languages : fr
Pages :
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Book Description
NOUS PRESENTONS DANS CETTE THESE, L'ETUDE ET LA REALISATION D'AMPLIFICATEURS OPTIQUES A SEMI-CONDUCTEURS (AOSC), DESTINES A ETRE UTILISES COMME REPETEURS DANS LES SYSTEMES DE TELECOMMUNICATION PAR FIBRE OPTIQUE MONOMODE AFIN DE COMPENSER LES PERTES EN LIGNES DUES A L'ATTENUATION INTRINSEQUE DE LA FIBRE. LE MEMOIRE DE THESE COMPREND TROIS PARTIES: DANS LA PREMIERE PARTIE, NOUS AVONS RESUME LES PRINCIPALES CARACTERISTIQUES DES AOSC EN INSISTANT TOUT PARTICULIEREMENT SUR L'INSENSIBILITE A LA POLARISATION QUI EST L'UNE DES PRINCIPALES EXIGENCES DES APPLICATIONS SYSTEMES. NOUS DISCUTONS LES CHOIX ADOPTES CONCERNANT LA STRUCTURE TECHNOLOGIQUE DES AOSC. DANS LA SECONDE PARTIE, NOUS PRESENTONS LES DIFFERENTES METHODES PERMETTANT DE S'AFFRANCHIR DE L'EFFET DE CAVITE PEROT-FABRY DES AOSC. NOUS METTONS L'ACCENT SUR LE DEVELOPPEMENT DES TRAITEMENTS ANTIREFLET, CES DERNIERS ETANT NECESSAIRES A LA REALISATION D'AOSC QUELLES QUE SOIENT LES SOLUTIONS TECHNOLOGIQUES CHOISIES PAR AILLEURS. DANS LA DERNIERE PARTIE, NOUS PRESENTONS LES BANCS DE CARACTERISTION MIS AU POINT AU COURS DE CETTE THESE AINSI QUE LES PRINCIPAUX RESULTATS EXPERIMENTAUX OBTENUS. PARMI CEUX-CI, NOTONS LA REALISATION D'AOSC INSENSIBLES A LA POLARISATION PRESENTANT UN GAIN SIMPLE PASSAGE ELEVE (25 A 30 DB) POUR UN COURANT D'INJECTION DE SEULEMENT 50 MA. CES RESULTATS ONT ETE OBTENUS GRACE A LA REALISATION DE COEFFICIENTS DE REFLEXION INFERIEURS A 1.10##4 SIMULTANEMENT SUR LES MODES TE ET TM EN UTILISANT UN ANTIREFLET BICOUCHE DE TYPE TIO#2/SIO#2
Author: PIERRE.. DOUSSIERE
Publisher:
ISBN:
Category :
Languages : fr
Pages :
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Book Description
L'OBJECTIF DE CETTE ETUDE EST LA DETERMINATION DU PARAMETRE D'EMISSION SPONTANEE DANS UN AMPLIFICATEUR A ONDE QUASI-PROGRESSIVE A SEMICONDUCTEUR INGAASP DONT LE MAXIMUM DE GAIN EST CENTRE A 1,5 M. UNE METHODE EST PROPOSEE BASEE SUR LA MESURE DU BRUIT DE BATTEMENT ENTRE UN SIGNAL COHERENT AMPLIFIE ET L'EMISSION SPONTANEE DANS LE BARITE DU SIGNAL
Author: Robert C. Hansen
Publisher:
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 472
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Book Description
Author: Alexander V. Sergienko
Publisher: CRC Press
ISBN: 1420026607
Category : Science
Languages : en
Pages : 248
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Book Description
All current methods of secure communication such as public-key cryptography can eventually be broken by faster computing. At the interface of physics and computer science lies a powerful solution for secure communications: quantum cryptography. Because eavesdropping changes the physical nature of the information, users in a quantum exchange can easily detect eavesdroppers. This allows for totally secure random key distribution, a central requirement for use of the one-time pad. Since the one-time pad is theoretically proven to be undecipherable, quantum cryptography is the key to perfect secrecy. Quantum Communications and Cryptography is the first comprehensive review of the past, present, and potential developments in this dynamic field. Leading expert contributors from around the world discuss the scientific foundations, experimental and theoretical developments, and cutting-edge technical and engineering advances in quantum communications and cryptography. The book describes the engineering principles and practical implementations in a real-world metropolitan network as well as physical principles and experimental results of such technologies as entanglement swapping and quantum teleportation. It also offers the first detailed treatment of quantum information processing with continuous variables. Technologies include both free-space and fiber-based communications systems along with the necessary protocols and information processing approaches. Bridging the gap between physics and engineering, Quantum Communications and Cryptography supplies a springboard for further developments and breakthroughs in this rapidly growing area.
Author: Xavier Begaud
Publisher: John Wiley & Sons
ISBN: 1118586573
Category : Technology & Engineering
Languages : en
Pages : 217
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Book Description
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.
Author: Alain Sibille
Publisher: Academic Press
ISBN: 0123821959
Category : Technology & Engineering
Languages : es
Pages : 385
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Book Description
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)
Author:
Publisher:
ISBN:
Category : Television
Languages : en
Pages : 14
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Book Description
Report to the President on investigation no. 332-95 under section 332 of the Tariff Act of 1930, as amended.
Author: Paolo Prandoni
Publisher: Collection Savoir suisse
ISBN: 2940222207
Category : Signal processing
Languages : en
Pages : 392
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Book Description
With a novel, less classical approach to the subject, the authors have written a book with the conviction that signal processing should be taught to be fun. The treatment is therefore less focused on the mathematics and more on the conceptual aspects, the idea being to allow the readers to think about the subject at a higher conceptual level, thus building the foundations for more advanced topics. The book remains an engineering text, with the goal of helping students solve real-world problems. In this vein, the last chapter pulls together the individual topics as discussed throughout the book into an in-depth look at the development of an end-to-end communication system, namely, a modem for communicating digital information over an analog channel.
Author: George Dassios
Publisher: Oxford University Press
ISBN: 9780198536789
Category : Language Arts & Disciplines
Languages : en
Pages : 322
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Book Description
Scattering theory deals with the interactions of waves with obstacles in their path, and low frequency scattering occurs when the obstacles involved are very small. This book gives an overview of the subject for graduates and researchers, for the first time unifying the theories covering acoustic, electromagnetic and elastic waves.
Author: Roberto Verdone
Publisher: Springer Science & Business Media
ISBN: 144712314X
Category : Computers
Languages : en
Pages : 696
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Book Description
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.
