[Les étalons de fréquence optique au calcium de la PTB et du NIST.]
Nous décrivons le présent état de l'art des étalons de fréquence optique avec des atomes neutres de Ca refroidis par laser, réalisés dans deux différents laboratoires, dans le but de développer éventuellement une future horloge atomique dans le domaine optique. Les mesures de fréquences réalisées à la Physikalisch-Technische Bundesanstalt (PTB) et au National Institute of Standards and Technology (NIST) ont permis d'établir la fréquence d'horloge du 40Ca parmi les fréquences optiques les mieux connues (avec une exactitude relative de ), ces mesures de fréquence étant en bon accord dans les deux laboratoires dans la limite de leur incertitude respective. Potentiellement, une amélioration par plusieurs ordres de grandeur de l'exactitude relative de l'étalon semble possible.
We describe the current status of the Ca optical frequency standards with laser-cooled neutral atoms realized in two different laboratories for the purpose of developing a possible future optical atomic clock. Frequency measurements performed at the Physikalisch-Technische Bundesanstalt (PTB) and the National Institute of Standards and Technology (NIST) make the frequency of the clock transition of 40Ca one of the best known optical frequencies (relative uncertainty ) and the measurements of this frequency in both laboratories agree to well within their respective uncertainties. Prospects for improvement by orders of magnitude in the relative uncertainty of the standard look feasible.
Mot clés : Étalons de fréquence optique, Horloge atomique, Spectroscopie laser
@article{CRPHYS_2004__5_8_845_0,
author = {U. Sterr and C. Degenhardt and H. Stoehr and Ch. Lisdat and H. Schnatz and J. Helmcke and F. Riehle and G. Wilpers and Ch. Oates and L. Hollberg},
title = {The optical calcium frequency standards of {PTB} and {NIST}},
journal = {Comptes Rendus. Physique},
pages = {845--855},
publisher = {Elsevier},
volume = {5},
number = {8},
year = {2004},
doi = {10.1016/j.crhy.2004.08.005},
language = {en},
}
TY - JOUR AU - U. Sterr AU - C. Degenhardt AU - H. Stoehr AU - Ch. Lisdat AU - H. Schnatz AU - J. Helmcke AU - F. Riehle AU - G. Wilpers AU - Ch. Oates AU - L. Hollberg TI - The optical calcium frequency standards of PTB and NIST JO - Comptes Rendus. Physique PY - 2004 SP - 845 EP - 855 VL - 5 IS - 8 PB - Elsevier DO - 10.1016/j.crhy.2004.08.005 LA - en ID - CRPHYS_2004__5_8_845_0 ER -
%0 Journal Article %A U. Sterr %A C. Degenhardt %A H. Stoehr %A Ch. Lisdat %A H. Schnatz %A J. Helmcke %A F. Riehle %A G. Wilpers %A Ch. Oates %A L. Hollberg %T The optical calcium frequency standards of PTB and NIST %J Comptes Rendus. Physique %D 2004 %P 845-855 %V 5 %N 8 %I Elsevier %R 10.1016/j.crhy.2004.08.005 %G en %F CRPHYS_2004__5_8_845_0
U. Sterr; C. Degenhardt; H. Stoehr; Ch. Lisdat; H. Schnatz; J. Helmcke; F. Riehle; G. Wilpers; Ch. Oates; L. Hollberg. The optical calcium frequency standards of PTB and NIST. Comptes Rendus. Physique, Volume 5 (2004) no. 8, pp. 845-855. doi : 10.1016/j.crhy.2004.08.005. https://comptes-rendus.academie-sciences.fr/physique/articles/10.1016/j.crhy.2004.08.005/
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