Compact, Low-Power Atomic Time and Frequency Standards PDF Download
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Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 6
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Book Description
We report the status of ongoing activities in development of a compact, low-power atomic time/frequency standard, the Chip-Scale Atomic Clock (CSAC). The status of efforts addressing the refinement of the CSAC for improved mechanical and environmental robustness is described. The improved frequency stability offered by CSAC has the potential to impact a number of system applications, and these impacts are discussed.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 6
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Book Description
We report the status of ongoing activities in development of a compact, low-power atomic time/frequency standard, the Chip-Scale Atomic Clock (CSAC). The status of efforts addressing the refinement of the CSAC for improved mechanical and environmental robustness is described. The improved frequency stability offered by CSAC has the potential to impact a number of system applications, and these impacts are discussed.
Author:
Publisher:
ISBN:
Category : Atomic clocks
Languages : en
Pages : 12
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Book Description
Author: Helmut Hellwig
Publisher:
ISBN:
Category : Frequency standards
Languages : en
Pages : 76
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Book Description
Author: Lute Maleki
Publisher: World Scientific
ISBN: 981283821X
Category : Science
Languages : en
Pages : 597
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Book Description
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 Universiteacute; 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 5ndash;11, 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.
Author: Ahmed Al-Samaneh
Publisher: BoD – Books on Demand
ISBN: 3738613668
Category : Technology & Engineering
Languages : en
Pages : 218
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Book Description
Frequency standards or clocks provide time references for a wide range of applications such as synchronization of communication networks, remote sensing and global positioning. Over the last couple of decades, demands on the data rates of many communication systems have substantially increased, imposing more restricted requirements on the stability of their timing devices. At the same time applications have become more mobile, increasing the demand for small and low-power clocks. Atomic clocks have provided the most stable frequency references for more than 50 years. However, the size and power requirements of microwave-cavity-based atomic clocks prohibit them from being portable and battery-operated. Hence, research on miniaturized atomic clocks (MACs) has been initiated by various research groups. A European research project on MACs, funded by the European commission started in 2008. This dissertation reports on the achievements within the European research project in the development of suitable lasers for such atomic clocks. Vertical-cavity surface-emitting lasers (VCSELs) are compelling light sources for MACs because of their low power consumption, high modulation bandwidth, and favorable beam characteristics. VCSELs must feature polarization-stable single-mode emission. Additionally, they must provide narrow linewidth emission at a center wavelength of about 894.6nm and be well suited for harmonic modulation at about 4.6GHz in order to employ coherent population trapping effect at the cesium D1 line. The polarization orientation of the emitted light of a standard VCSEL is a priori unknown. Polarization control is achieved by etching a shallow surface grating in the top Bragg mirror. For the purpose of integration with the clock microsystem, flip-chip-bondable VCSEL designs are realized. Such designs facilitate a straightforward mounting and make the electrical contacts high-frequency compatible.
Author: John B. Milton
Publisher:
ISBN:
Category : Frequency standards
Languages : en
Pages : 28
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Book Description
Author: Fritz Riehle
Publisher: John Wiley & Sons
ISBN: 3527605959
Category : Science
Languages : en
Pages : 540
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Book Description
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.
Author: James Jespersen
Publisher: Courier Corporation
ISBN: 0486409139
Category : Science
Languages : en
Pages : 322
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Book Description
Clear and accessible introduction to the concept of time examines measurement, historic timekeeping methods, uses of time information, role of time in science and technology, and much more. Over 300 illustrations.
Author: United States. National Bureau of Standards
Publisher:
ISBN:
Category :
Languages : en
Pages : 29
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Book Description
Author: John B.. Milton
Publisher:
ISBN:
Category :
Languages : en
Pages : 28
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Book Description
