Frequency Standards

Basics and Applications

Author: Fritz Riehle

Publisher: John Wiley & Sons

ISBN: 3527605959

Category: Science

Page: 540

View: 8632

Of all measurement units, frequency is the one that may be determined with the highest degree of accuracy. It equally allows precise measurements of other physical and technical quantities, whenever they can be measured in terms of frequency. This volume covers the central methods and techniques relevant for frequency standards developed in physics, electronics, quantum electronics, and statistics. After a review of the basic principles, the book looks at the realisation of commonly used components. It then continues with the description and characterisation of important frequency standards from atomic clocks, to frequency stabilised lasers. The whole is rounded of with a discussion of topical applications in engineering, telecommunications, and metrology.
Posted in Science

Frequency Standards and Metrology

Proceedings of the Fourth Symposium, Ancona, Italy, September 5 – 9, 1988

Author: Andrea De Marchi

Publisher: Springer Science & Business Media

ISBN: 3642745016

Category: Technology & Engineering

Page: 484

View: 3887

Since the previous Symposium, several exciting new developments and advances have occurred in the field of frequency standards and metrology. These include the first results on the long-tenn stability of a millisecond Pulsar, for which data 14 integrated over several years now show a stability of around 10- . Improvements in the understanding of various biases in Cesium beam standards promise accuracies in the low 14s for primary standards and in the low 13s for short commercial tubes, for which long tenn stabilities in low 14s have already been shown to be obtainable by accuracy improvement. Beams using optical pumping for state selection and for detection have been operated with excellent results, and more are being realized. Other new frequency standards which have appeared include a macroscopic rf trap with Mercury ions, which perfonns in the low 15s in one day, the sub millimeter metastable Magnesium beam, which has shown a short tenn stability 19 in the low 12s in one second and promises an accuracy of 10- , and the cold Hydrogen masers, which have such high stabilities that they cannot be measured with existing local oscillators. Prospects for future developments include laser manipulation of neutrals and spectroscopy of single ions at rest in a trap. Both these groups of techniques have great potential for unprecedented accuracy and short-and long-tenn stability, and new superior frequency standards are expected to be realizable in this way in the not too distant future.
Posted in Technology & Engineering

Frequency Standards and Metrology - Proceedings of the 7Th Symposium

Author: Lute Maleki

Publisher: World Scientific

ISBN: 9812838228

Category: Technology & Engineering

Page: 596

View: 7635

The Symposium on Frequency Standards and Metrology is an event held approximately every seven years, and is regarded as the premier conference in the field of advanced clocks and oscillators together with their applications in science and metrology. This series began with the first meeting at Universit(r) Laval, Quebec Canada in 1971, and the last one was held in 2001 at the University of St. Andrews, Scotland. The 7th Symposium on Frequency Standards and Metrology is scheduled for October 5OCo11, 2008 at the Asilomar Conference Grounds in Pacific Grove, California, USA. The Symposium is intended as a forum for bringing together international scientists and technologists engaged in the development of precise frequency standards and clocks, the study of their underlying physics, and their applications in metrology and tests of fundamental laws. The symposium has been traditionally held in a venue that promotes exchange of information on emerging ideas and latest achievements in the field, with a single-session approach which includes oral presentations by invitation, poster session(s) and keynote talks from internationally-recognized speakers. The program also includes social and other events aimed at promoting the exchange of technical and scientific information."
Posted in Technology & Engineering

Frequency Standards And Metrology - Proceedings Of The Fifth Symposium

Author: Bergquist James Charles

Publisher: World Scientific

ISBN: 9814548235


Page: 572

View: 3957

The Symposium on Frequency Standards and Metrology serves as an international forum for discussion of precision frequency standards throughout the electromagnetic spectrum and associated metrology. The symposium focuses on the fundamental aspects of the latest ideas, results and applications in relation to these frequency standards.
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High-accuracy frequency standards in aerial navigation

final report, contract no. FA-WA-4222, final copy

Author: Sierra Research Corporation,Roger B. Russell,John P. Chisholm,United States. Federal Aviation Agency. Systems Research and Development Service

Publisher: N.A


Category: Technology & Engineering

Page: N.A

View: 4145

Posted in Technology & Engineering

Frequency Standards and Metrology

Author: Patrick Gill

Publisher: World Scientific

ISBN: 9814488860

Category: Science

Page: 680

View: 3500

This book discusses the latest research ideas with application to frequency standards (e.g. optical clocks) and assesses ideas from previous symposia which have undergone critical analysis. Contents:OPOs and IR StandardsCs Fountains and ComparisonsTrapped Ions IOptical Combs ICPT StandardsPrecision MeasurementsSpace ClocksCold Atom TechniquesMicrowave StandardsCold Atom Optical StandardsTrapped Ions IIStable Lasers and ApplicationsOptical Combs IIIR Standards IICaesium and Rubidium StandardsTrapped Ion Optical StandardsInfrared Standards IIIIodine-Stabilized Laser StandardsPresicion Measurements IICold Atom Optical Standards and TechniquesOptical Frequency Combs and Stable LasersMicrowave Standards and SynthesisSpace Clocks II1.5 μm Standards Readership: Graduate students and researchers in applied physics, low temperature physics, optics, condensed matter physics, astrophysics/astronomy/cosmology, quantum physics and earthquake engineering. Keywords:Optical Clocks;Caesium Fountain Clocks;Trapped Ion Standards;Optical Frequency Standards;Microwave Frequency Standards;Cold Atom Standards;Optical Frequency Measurement;Stabilised Lasers;Optical Frequency Combs;Femtosecond Combs;Space Clocks;Precision Measurements and Fundamental Constants;Microwave Frequency Synthesis;Optical Frequency Synthesis;Infra-Red Frequency Standards
Posted in Science

Frequency standards and clocks

a tutorial introduction

Author: Helmut Hellwig

Publisher: N.A


Category: Atomic clocks

Page: 65

View: 2453

Posted in Atomic clocks

Wireless Radio-Frequency Standards and System Design: Advanced Techniques

Advanced Techniques

Author: Cornetta, Gianluca

Publisher: IGI Global

ISBN: 1466600845

Category: Computers

Page: 422

View: 7357

Radio-frequency (RF) integrated circuits in CMOS technology are gaining increasing popularity in the commercial world, and CMOS technology has become the dominant technology for applications such as GPS receivers, GSM cellular transceivers, wireless LAN, and wireless short-range personal area networks based on IEEE 802.15.1 (Bluetooth) or IEEE 802.15.4 (ZigBee) standards. Furthermore, the increasing interest in wireless technologies and the widespread of wireless communications has prompted an ever increasing demand for radio frequency transceivers. Wireless Radio-Frequency Standards and System Design: Advanced Techniques provides perspectives on radio-frequency circuit and systems design, covering recent topics and developments in the RF area. Exploring topics such as LNA linearization, behavioral modeling and co-simulation of analog and mixed-signal complex blocks for RF applications, integrated passive devices for RF-ICs and baseband design techniques and wireless standards, this is a comprehensive reference for students as well as practicing professionals.
Posted in Computers

Frequency Measurement and Control

Advanced Techniques and Future Trends

Author: Andre N. Luiten

Publisher: Springer Science & Business Media

ISBN: 3540449914

Category: Technology & Engineering

Page: 397

View: 5103

This text on precision frequency measurement and its key enabling techniques includes reviews written by some of the most experienced researchers in their respective fields. This text should prove useful to researchers just entering the field of frequency metrology and standards, or equally well to the experienced practitioner.
Posted in Technology & Engineering

The Quantum Physics of Atomic Frequency Standards

Recent Developments

Author: Jacques Vanier,Cipriana Tomescu

Publisher: CRC Press

ISBN: 1466576979

Category: Science

Page: 486

View: 3426

Up-to-Date Coverage of Stable and Accurate Frequency Standards The Quantum Physics of Atomic Frequency Standards: Recent Developments covers advances in atomic frequency standards (atomic clocks) from the last several decades. It explains the use of various techniques, such as laser optical pumping, coherent population trapping, laser cooling, and electromagnetic and optical trapping, in the implementation of classical microwave and optical atomic frequency standards. The book first discusses improvements to conventional atomic frequency standards, highlighting the main limitations of those frequency standards and the physical basis of the limitations. It then describes how advances in the theory and applications of atomic physics have opened new avenues in frequency standards. The authors go on to explore the research and development of new microwave and optical frequency standards before presenting the results in frequency stability and accuracy achieved with these new frequency standards. They also illustrate the application of atomic clocks in metrology, telecommunications, navigation, and other areas and give some insight into future work. Building on the success of the previous two volumes, this up-to-date, in-depth book examines the vast improvements to atomic clocks that have occurred in the last 25 years. The improved stability and accuracy enable the verification of physical concepts used in fundamental theories, such as relativity, as well as the stability of fundamental constants intrinsic to those theories.
Posted in Science

Frequency and Time

Author: B. E. Blair,A. H. Morgan

Publisher: N.A


Category: Frequency standards

Page: 555

View: 5224

Posted in Frequency standards

Laser-Based Measurements for Time and Frequency Domain Applications

A Handbook

Author: Pasquale Maddaloni,Marco Bellini,Paolo De Natale

Publisher: Taylor & Francis

ISBN: 1439841535

Category: Technology & Engineering

Page: 764

View: 3551

Foreword by Nobel laureate Professor Theodor W. Hänsch of Ludwig-Maximilians-Universität München Based on the authors’ experimental work over the last 25 years, Laser-Based Measurements for Time and Frequency Domain Applications: A Handbook presents basic concepts, state-of-the-art applications, and future trends in optical, atomic, and molecular physics. It provides all the background information on the main kinds of laser sources and techniques, offers a detailed account of the most recent results obtained for time- and frequency-domain applications of lasers, and develops the theoretical framework necessary for understanding the experimental applications. After a historical introduction, the book describes the basic concepts and mathematical tools required for studying the physics of oscillators. It then discusses microwave and optical resonators, crucial aspects of operation and fundamental properties of lasers, and precision spectroscopy and absolute frequency metrology. It also focuses on microwave and optical frequency standards and explores current and potential research directions. Accessible to scientists, postdoc researchers, and advanced undergraduate students, this self-contained book gives a wide-ranging, balanced overview of the areas—including frequency standards and clocks, ultra-high-precision spectroscopy, quantum information, and environmental metrology—revolutionized by the recent advent of optical frequency comb synthesizers (OFCSs) based on femtosecond mode-locked lasers. The book is also a useful guide to cutting-edge research for manufacturers of advanced laser systems and optical devices.
Posted in Technology & Engineering