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Author : Claude Lamarre
Publisher :
ISBN 13 :
Total Pages : 314 pages
Book Rating : 4.:/5 (113 download)
Download or read book Stabilisation en fréquence par injection de lumière dans les diodes lasers written by Claude Lamarre and published by . This book was released on 1984 with total page 314 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : JEAN-PHILIPPE.. BOUYER
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (49 download)
Download or read book STABILISATION PAR INJECTION OPTIQUE D'UN LASER A SEMI-CONDUCTEUR written by JEAN-PHILIPPE.. BOUYER and published by . This book was released on 1992 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: CE MEMOIRE PRESENTE LES RESULTATS EXPERIMENTAUX ET THEORIQUES OBTENUS SUR LE VERROUILLAGE DE PHASE ET LE TRANSFERT DE PURETE SPECTRALE PAR INJECTION OPTIQUE DANS LES LASERS A SEMI-CONDUCTEUR EN INGAASP. SUR LE PLAN EXPERIMENTAL, QUELQUES DIZAINES DE NANOWATTS SUFFISENT A IMPOSER AU LASER ESCLAVE LA FREQUENCE DU FAISCEAU INJECTE. LE BRUIT DE FREQUENCE DU LASER MAITRE, TROP ELEVE POUR PERMETTRE UNE ETUDE PRECISE DE L'INJECTION, EST REDUIT PAR COUPLAGE OPTIQUE RESONNANT SUR CAVITE EXTERNE. LE TRANSFERT DE LA PURETE SPECTRALE DU LASER MAITRE, AINSI QUE LA STABILITE DU LASER ESCLAVE LE LONG DE LA PLAGE DE VERROUILLAGE, SONT EXAMINES EN DETAIL. DE PLUS, LE TRANSFERT DE PURETE SPECTRALE D'UN FAISCEAU MONOMODE DANS UN COMPOSANT MULTIMODE, EST EGALEMENT ETUDIE. SUR LE PLAN THEORIQUE, L'EVOLUTION NON LINEAIRE DES MECANISMES DE VERROUILLAGE DE PHASE, DANS LES TROIS REGIMES D'INJECTION, EST INTEGRALEMENT EXPLIQUEE. LE TRANSFERT DE PURETE SPECTRALE SE MANIFESTE, DANS LE CAS MULTIMODE, PAR UN PARTAGE DE SATURATION ENTRE LES DIVERSES COMPOSANTES SPECTRALES DE GAIN. DANS LE CAS MULTIMODE, PAR UN PARTAGE DE SATURATION ENTRE LES DIVERSES COMPOSANTES SPECTRALES DE GAIN. DANS LE CAS MONOMODE, LE CALCUL DE LA DENSITE SPECTRALE DE BRUIT DE FREQUENCE DE LA DIODE LASER ESCLAVE, INJECTEE PAR UN FAISCEAU STABILISE EN FREQUENCE, MONTRE QUE LA PURETE SPECTRALE DU LASER MAITRE EST INTEGRALEMENT TRANSMISE AU LASER ESCLAVE, JUSQU'A UNE FREQUENCE DE COUPURE PROPORTIONNELLE A LA RACINE CARREE DE LA PUISSANCE INJECTEE. UN CHAPITRE D'APPLICATION MET FINALEMENT EN UVRE TROIS METHODES DE MESURE DU FACTEUR DE HENRY FONDEES SUR L'INJECTION OPTIQUE ET PERMET D'ESTIMER LEURS FIABILITES RELATIVES
Author : Philippe Laurent
Publisher :
ISBN 13 :
Total Pages : 380 pages
Book Rating : 4.:/5 (49 download)
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 :
Publisher :
ISBN 13 :
Total Pages : 1186 pages
Book Rating : 4.3/5 (243 download)
Download or read book Canadiana written by and published by . This book was released on 1987 with total page 1186 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : PHILIPPE.. SABOUREAU
Publisher :
ISBN 13 :
Total Pages : 339 pages
Book Rating : 4.:/5 (49 download)
Download or read book EFFETS COMBINES DE L'INJECTION OPTIQUE ET D'UNE BOUCLE DE CONTRE-REACTION OPTOELECTRONIQUE SUR LA DYNAMIQUE D'UNE DIODE LASER written by PHILIPPE.. SABOUREAU and published by . This book was released on 1996 with total page 339 pages. Available in PDF, EPUB and Kindle. Book excerpt: CE MEMOIRE PRESENTE LES RESULTATS THEORIQUES ET EXPERIMENTAUX OBTENUS SUR L'ETUDE DES EFFETS D'UNE BOUCLE DE CONTRE-REACTION OPTOELECTRONIQUE SUR UNE DIODE LASER SOUS INJECTION OPTIQUE. L'INJECTION OPTIQUE PERMET D'AMELIORER LES QUALITES SPECTRALES ET SPATIALES DES LASERS EN TRANSFERANT LA PURETE SPECTRALE DU LASER MAITRE VERS LE LASER ESCLAVE INJECTE. CEPENDANT, A FORTE PUISSANCE D'INJECTION, DES INSTABILITES APPARAISSENT DANS LE FONCTIONNEMENT DU LASER ESCLAVE REDUISANT LA PLAGE DE VERROUILLAGE. DE PLUS, LES LIMITES DE CETTE PLAGE DEPENDENT DE FACON CRUCIALE DU COEFFICIENT DE GAIN NON LINEAIRE ET DU FACTEUR DE COUPLAGE PHASE-AMPLITUDE. AUSSI, LA MESURE DU DOMAINE DE VERROUILLAGE PERMET DE DETERMINER LA VALEUR DE CES PARAMETRES. L'APPLICATION D'UNE BOUCLE DE CONTRE-REACTION OPTOELECTRONIQUE MODIFIE EGALEMENT LE COMPORTEMENT DYNAMIQUE D'UNE DIODE LASER. AINSI, LE FEED-BACK PEUT ENTRAINER SOIT UNE REDUCTION DES FLUCTUATIONS DU LASER (FEED-BACK NEGATIF) SOIT AU CONTRAIRE LEUR AMPLIFICATION (FEED-BACK POSITIF). ON OBSERVE EXPERIMENTALEMENT, DANS CE SECOND CAS, LA GENERATION D'IMPULSIONS COURTES AVEC UN TAUX DE REPETITION ACCORDABLE AVEC LE COURANT DU LASER. LA MODIFICATION DE LA DYNAMIQUE DU LASER PAR UNE CONTRE-REACTION OPTOELECTRONIQUE EST UTILISEE POUR AMELIORER LES CARACTERISTIQUES D'UN LASER SOUS INJECTION. UN FEED-BACK NEGATIF STABILISE LE LASER DANS LE DOMAINE INSTABLE. LES NOUVELLES LIMITES DE LA PLAGE DE VERROUILLAGE OBTENUES MONTRENT QUE L'AMORTISSEMENT EST D'AUTANT PLUS EFFICACE QUE LE RETARD DE LA BOUCLE EST FAIBLE. LE FEED-BACK POSITIF PERMET, PAR CONTRE, D'AMPLIFIER ET DE STABILISER EN FREQUENCE LA MODULATION GENEREE PAR L'INJECTION. ON OBTIENT AINSI EXPERIMENTALEMENT UNE SOURCE LASER MODULEE A PLUSIEURS GIGAHERTZ SANS ALIMENTATION EXTERIEURE. L'ACCORDABILITE DE LA FREQUENCE DE MODULATION EST OBTENUE PAR LE CONTROLE DU COURANT DES LASERS
Author : T. Okoshi
Publisher : Springer Science & Business Media
ISBN 13 : 9789027726773
Total Pages : 302 pages
Book Rating : 4.7/5 (267 download)
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:
Author : Leslie Rainer
Publisher : Getty Publications
ISBN 13 : 1606060430
Total Pages : 438 pages
Book Rating : 4.6/5 (6 download)
Download or read book Terra 2008 written by Leslie Rainer and published by Getty Publications. This book was released on 2011-06-14 with total page 438 pages. Available in PDF, EPUB and Kindle. Book excerpt: Earthen architecture constitutes one of the most diverse forms of cultural heritage and one of the most challenging to preserve. It dates from all periods and is found on all continents but is particularly prevalent in Africa, where it has been a building tradition for centuries. Sites range from ancestral cities in Mali to the palaces of Abomey in Benin, from monuments and mosques in Iran and Buddhist temples on the Silk Road to Spanish missions in California. This volume's sixty-four papers address such themes as earthen architecture in Mali, the conservation of living sites, local knowledge systems and intangible aspects, seismic and other natural forces, the conservation and management of archaeological sites, research advances, and training.
Author : Ahmed Belasri
Publisher : Springer Nature
ISBN 13 : 9811554447
Total Pages : 659 pages
Book Rating : 4.8/5 (115 download)
Download or read book ICREEC 2019 written by Ahmed Belasri and published by Springer Nature. This book was released on 2020-06-10 with total page 659 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book highlights peer reviewed articles from the 1st International Conference on Renewable Energy and Energy Conversion, ICREEC 2019, held at Oran in Algeria. It presents recent advances, brings together researchers and professionals in the area and presents a platform to exchange ideas and establish opportunities for a sustainable future. Topics covered in this proceedings, but not limited to, are photovoltaic systems, bioenergy, laser and plasma technology, fluid and flow for energy, software for energy and impact of energy on the environment.
Author : Don Montague
Publisher : Taylor & Francis
ISBN 13 : 9780419199106
Total Pages : 472 pages
Book Rating : 4.1/5 (991 download)
Download or read book Dictionary of Building and Civil Engineering written by Don Montague and published by Taylor & Francis. This book was released on 1996 with total page 472 pages. Available in PDF, EPUB and Kindle. Book excerpt: This dual-language dictionary lists over 20,000 specialist terms in both French and English, covering architecture, building, engineering and property terms. It meets the needs of all building professionals working on projects overseas. It has been comprehensively researched and compiled to provide an invaluable reference source in an increasingly European marketplace.
Author : United States. National Bureau of Standards
Publisher :
ISBN 13 :
Total Pages : 546 pages
Book Rating : 4.3/5 (91 download)
Download or read book Precision Measurement and Fundamental Constants; Proceedings written by United States. National Bureau of Standards and published by . This book was released on 1971 with total page 546 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Stefano Boccaletti
Publisher : A I P Press
ISBN 13 :
Total Pages : 384 pages
Book Rating : 4.F/5 ( download)
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.
Author : EFTF
Publisher :
ISBN 13 : 9781538656204
Total Pages : pages
Book Rating : 4.6/5 (562 download)
Download or read book 2018 European Frequency and Time Forum (EFTF) written by EFTF and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Dirk Puetzfeld
Publisher : Springer
ISBN 13 : 3030115003
Total Pages : 485 pages
Book Rating : 4.0/5 (31 download)
Download or read book Relativistic Geodesy written by Dirk Puetzfeld and published by Springer. This book was released on 2019-02-09 with total page 485 pages. Available in PDF, EPUB and Kindle. Book excerpt: Due to steadily improving experimental accuracy, relativistic concepts – based on Einstein’s theory of Special and General Relativity – are playing an increasingly important role in modern geodesy. This book offers an introduction to the emerging field of relativistic geodesy, and covers topics ranging from the description of clocks and test bodies, to time and frequency measurements, to current and future observations. Emphasis is placed on geodetically relevant definitions and fundamental methods in the context of Einstein’s theory (e.g. the role of observers, use of clocks, definition of reference systems and the geoid, use of relativistic approximation schemes). Further, the applications discussed range from chronometric and gradiometric determinations of the gravitational field, to the latest (satellite) experiments. The impact of choices made at a fundamental theoretical level on the interpretation of measurements and the planning of future experiments is also highlighted. Providing an up-to-the-minute status report on the respective topics discussed, the book will not only benefit experts, but will also serve as a guide for students with a background in either geodesy or gravitational physics who are interested in entering and exploring this emerging field.
Author : Institute of Electrical and Electronics Engineers
Publisher :
ISBN 13 :
Total Pages : 674 pages
Book Rating : 4.:/5 (836 download)
Download or read book MILCOM 2005 written by Institute of Electrical and Electronics Engineers and published by . This book was released on 2005 with total page 674 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Alan D. Lopez
Publisher : World Bank Publications
ISBN 13 : 0821362631
Total Pages : 511 pages
Book Rating : 4.8/5 (213 download)
Download or read book Global Burden of Disease and Risk Factors written by Alan D. Lopez and published by World Bank Publications. This book was released on 2006-04-02 with total page 511 pages. Available in PDF, EPUB and Kindle. Book excerpt: Strategic health planning, the cornerstone of initiatives designed to achieve health improvement goals around the world, requires an understanding of the comparative burden of diseases and injuries, their corresponding risk factors and the likely effects of invervention options. The Global Burden of Disease framework, originally published in 1990, has been widely adopted as the preferred method for health accounting and has become the standard to guide the setting of health research priorities. This publication sets out an updated assessment of the situation, with an analysis of trends observed since 1990 and a chapter on the sensitivity of GBD estimates to various sources of uncertainty in methods and data.
Author : Ismail Serageldin
Publisher : CABI
ISBN 13 : 9780851996752
Total Pages : 340 pages
Book Rating : 4.9/5 (967 download)
Download or read book Biotechnology and Sustainable Development written by Ismail Serageldin and published by CABI. This book was released on 2003 with total page 340 pages. Available in PDF, EPUB and Kindle. Book excerpt: Based on the first scientific conference convened at the Library of Alexandria, 'Biotechnology and Sustainable Development: Voices of the South and North', which was held in Alexandria, Egypt, in March 2002, this book contains overviews of agriculture, health, ethics and the environment. It discusses how dramatic improvements in food security, health, and lifestyle could accrue to the poor people of developing countries through the applications of new technologies.
Author : Mária Németh Lenke
Publisher :
ISBN 13 :
Total Pages : 164 pages
Book Rating : 4.F/5 ( download)
Download or read book "All it Is, It's a Carnival" written by Mária Németh Lenke and published by . This book was released on 2007 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt:
