TRANSMISSION NUMERIQUE SUR FIBRE MONOMODE AVEC DETECTION HETERODYNE ET MODULATION DE PHASE PDF Download

Author: YOLANDE.. CAMPION
Publisher:
ISBN:
Category :
Languages : fr
Pages : 196

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Book Description
RAPPEL DE LA DETECTION HETERODYNE, PERFORMANCE DES SYSTEMES HETERODYNES COHERENTS SELON LE TYPE DE MODULATION CHOISI. MODELISATION D'UN RECEPTEUR OPTIQUE DE TYPE PIN-FET. ETUDE DU PHENOMENE QUALIFIE DE "BRUIT DE PHASE" LORSQU'IL EST ABORDE SOUS L'ANGLE DE LA TRANSMISSION. EVALUATION DE L'INFLUENCE DU BRUIT DE PHASE SUR LES PERFORMANCES DES SYSTEMES HETERODYNES UTILISANT LA MODULATION DE PHASE. MESURES EFFECTUEES DANS LE BUT DE CONFRONTER LA THEORIE PRECEDENTE A L'EXPERIENCE. DESCRIPTION DE 2 TECHNIQUES PERMETTANT D'AMELIORER LES PERFORMANCES DE LA DETECTION HETERODYNE

Author: Wolfgang Demtröder
Publisher: Springer
ISBN: 3642538592
Category : Science
Languages : en
Pages : 510

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Book Description
Keeping abreast of the latest techniques and applications, this new edition of the standard reference and graduate text on laser spectroscopy has been completely revised and expanded. While the general concept is unchanged, the new edition features a broad array of new material, e.g., ultrafast lasers (atto- and femtosecond lasers) and parametric oscillators, coherent matter waves, Doppler-free Fourier spectroscopy with optical frequency combs, interference spectroscopy, quantum optics, the interferometric detection of gravitational waves and still more applications in chemical analysis, medical diagnostics, and engineering.

Author: Institute of Electrical and Electronics Engineers
Publisher:
ISBN:
Category :
Languages : en
Pages : 674

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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: Robert R. Alfano
Publisher: Springer Science & Business Media
ISBN: 0387250972
Category : Science
Languages : en
Pages : 552

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Book Description
This new edition of a classic in the field has been expanded and enriched with new content and updated references. The book covers the fundamental principles and surveys research of current thinkers and experts in the field with updated references of the key breakthroughs over the past decade and a half.

Author: Hamid Hemmati
Publisher: CRC Press
ISBN: 1420015443
Category : Science
Languages : en
Pages : 418

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Book Description
Invented more than a hundred years ago by Alexander Graham Bell, the technology of free-space optical communications, or lasercom, has finally reached the level of maturity required to meet a growing demand for operational multi-giga-bit-per-second data rate systems communicating to and from aircrafts and satellites. Putting the emphasis on near-earth links, including air, LEO, MEO, and GEO orbits, Near-Earth Laser Communications presents a summary of important free-space laser communication subsystem challenges and discusses potential ways to overcome them. This comprehensive reference provides up-to-date information on component and subsystem technologies, fundamental limitations, and approaches to reach those limits. It covers basic concepts and state-of-the-art technologies, emphasizing device technology, implementation techniques, and system trades. The authors discuss hardware technologies and their applications, and also explore ongoing research activities and those planned for the near future. The analytical aspects of laser communication have been covered to a great extent in several books. However, a detailed approach to system design and development, including trades on subsystem choices and implications of the hardware selection for satellite and aircraft telecommunications, is missing. Highlighting key design variations and critical differences between them, this book distills decades’ worth of experience into a practical resource on hardware technologies.

Author: Stefano Boccaletti
Publisher: A I P Press
ISBN:
Category : Mathematics
Languages : en
Pages : 384

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Book Description
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: Hamid Hemmati
Publisher: John Wiley & Sons
ISBN: 0470042400
Category : Technology & Engineering
Languages : en
Pages : 683

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Book Description
A quarter century of research into deep space and near Earth optical communications This book captures a quarter century of research and development in deep space optical communications from the Jet Propulsion Laboratory (JPL). Additionally, it presents findings from other optical communications research groups from around the world for a full perspective. Readers are brought up to date with the latest developments in optical communications technology, as well as the state of the art in component and subsystem technologies, fundamental limitations, and approaches to develop and fully exploit new technologies. The book explores the unique requirements and technologies for deep space optical communications, including: * Technology overview; link and system design drivers * Atmospheric transmission, propagation, and reception issues * Flight and ground terminal architecture and subsystems * Future prospects and applications, including navigational tracking and light science This is the first book to specifically address deep space optical communications. With an increasing demand for data from planetary spacecraft and other sources, it is essential reading for all optical communications, telecommunications, and system engineers, as well as technical managers in the aerospace industry. It is also recommended for graduate students interested in deep space communications.

Author: Wolfgang Demtröder
Publisher: Springer Science & Business Media
ISBN: 354073418X
Category : Science
Languages : en
Pages : 469

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Book Description
Keeping abreast of the latest techniques and applications, this new edition of the standard reference and graduate text on laser spectroscopy has been completely revised and expanded. While the general concept is unchanged, the new edition features a broad array of new material, including applications in chemical analysis, medical diagnostics, and engineering. No other book with such a broad scope is available. The author is one of the most renowned experts in this area. The book is well illustrated, and is supplemented by an extensive set of references. It will benefit all students and scientists working in the field.

Author: Wolfgang Demtröder
Publisher: Springer
ISBN: 3662446413
Category : Science
Languages : en
Pages : 773

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Book Description
Keeping abreast of the latest techniques and applications, this new edition of the standard reference and graduate text on laser spectroscopy has been completely revised and expanded. While the general concept is unchanged, the new edition features a broad array of new material, e.g., ultrafast lasers (atto- and femto-second lasers), coherent matter waves, Doppler-free Fourier spectroscopy, interference spectroscopy, quantum optics and gravitational waves and still more applications in chemical analysis, medical diagnostics, and engineering.