Zobrazeno 1 - 10
of 41
pro vyhledávání: '"Leonard S. Cutler"'
Autor:
Leonard S. Cutler
Publikováno v:
Metrologia. 42:S90-S99
The first commercial caesium-beam clock was the Atomichron, developed by National Company. The first unit was delivered in 1956. This paper first presents a brief history of commercial caesium-beam clocks. It then covers many of the sources of freque
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d487a2d5b837b2fbf37342f1b73f23b5
https://doi.org/10.1088/0026-1394/42/3/s10
https://doi.org/10.1088/0026-1394/42/3/s10
Publikováno v:
IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control. 39:398-404
Preliminary measurements on high-T/sub c/ superconducting resonators are reported and why they are attractive candidates for incorporation in low-noise oscillators is discussed. Some of the important contributions to oscillator noise are reviewed and
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ceeb7e2c9f26bf91a87f2c1290056c62
https://doi.org/10.1109/58.143173
https://doi.org/10.1109/58.143173
Publikováno v:
Journal of Applied Physics. 69:2780-2792
It is demonstrated that frequency pulling by Δm=±1 hyperfine σ transitions, here called Ramsey pulling, is a real calculable effect in atomic beam frequency standards. An analytic expression for the effects of Ramsey pulling is derived using pertu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3c417eed9b7927b0af9040bdeb6c53d3
https://doi.org/10.1063/1.348637
https://doi.org/10.1063/1.348637
Publikováno v:
Proceedings of the 2004 IEEE International Frequency Control Symposium and Exposition, 2004..
The paper discusses the theory of microwave resonance-line asymmetry in coherent population trapping (CPT) based frequency standards. Frequency errors caused by the asymmetry, and techniques for reducing the errors are described (patent pending).
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::46a7f6d122d9873062c1192dcfbc5026
https://doi.org/10.1109/freq.2004.1418443
https://doi.org/10.1109/freq.2004.1418443
Publikováno v:
Proceedings of the 2004 IEEE International Frequency Control Symposium and Exposition, 2004..
We report our measurement of coherent-population-trapping (CPT) signal linewidths in small vapor cells, which are desirable for chip scale atomic clock (CSAC) applications. The linewidths are measured in both rubidium vapor cells and cesium vapor cel
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::03eaa1b4a004cb0210b5cdbcbcc883eb
https://doi.org/10.1109/freq.2004.1418435
https://doi.org/10.1109/freq.2004.1418435
Publikováno v:
Proceedings of the 1999 Joint Meeting of the European Frequency and Time Forum and the IEEE International Frequency Control Symposium (Cat. No.99CH36313).
Since its introduction 7 years ago, the Hewlett-Packard cesium beam frequency standard has been installed in many national laboratories. At the present, this standard represents over 70% of the number of atomic clocks reported to the Bureau Internati
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::641baee37f1269b952293c471bcb8118
https://doi.org/10.1109/freq.1999.840733
https://doi.org/10.1109/freq.1999.840733
Autor:
Leonard S. Cutler, R.P. Giffard
Publikováno v:
Proceedings of the 1992 IEEE Frequency Control Symposium.
A high-resolution digital frequency synthesizer was designed to provide modulation and fine frequency interpolation in a new cesium frequency standard. Requirements include resolution, spectral purity, phase-continuous frequency modulation, simplicit
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::41c1d19747310dcb85f75e0e988ee099
https://doi.org/10.1109/freq.1992.270015
https://doi.org/10.1109/freq.1992.270015
Autor:
W.J. Riley, E.P. EerNisse, M.M. Driscoll, Claude Audoin, John R. Vig, Raymond L. Filler, R.C. Smythe, R.D. Weglein, R.M. Garvey, Leonard S. Cutler
Publikováno v:
Proceedings of the 1992 IEEE Frequency Control Symposium.
The effects of acceleration on quartz and atomic frequency sources are discussed. Guidelines are provided for the specification and testing of oscillator acceleration sensitivities. The discussion includes: steady-state acceleration effects; gravity
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5830768f164f511b0696a6822416412e
https://doi.org/10.1109/freq.1992.269960
https://doi.org/10.1109/freq.1992.269960
Publikováno v:
Proceedings of the 1992 IEEE Frequency Control Symposium.
In order to provide guidelines for standardized tests and methods for measuring and characterizing the environmental sensitivities of precision oscillators, the IEEE is preparing a standards document. As part of that effort (Project P1193), general e
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3a06ab67c27ed248ad52aedb19d4665f
https://doi.org/10.1109/freq.1992.269955
https://doi.org/10.1109/freq.1992.269955
Autor:
Leonard S. Cutler, R.P. Giffard
Publikováno v:
Proceedings of the 1992 IEEE Frequency Control Symposium.
A description is given of a new electronics design that addresses microwave amplitude shift, C-field, Rabi pulling, microwave spectral purity, and modulation distortion. The design is microprocessor-based, with automatic lock-up and long term operati
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2eb7f07c8b7d1c47477e2cd68bb62d2d
https://doi.org/10.1109/freq.1992.270024
https://doi.org/10.1109/freq.1992.270024