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Proceedings Paper

Precision spectroscopy with ultracold atoms: measurement of optical frequencies
Author(s): Juergen Helmcke
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Paper Abstract

Precision laser spectroscopy at λ = 657 nm based on cold neutral Ca atoms released from a magneto-optical trap (MOT) is described. Systematic contributions to the uncertainty resulting from the residual velocity of the atoms and the acceleration in the gravitational field are determined and their influence is reduced by using a combination of different atom interferometers. The results are applied to an optical frequency standard based on Ca atoms. A fractional uncertainty in the measured clock frequency 2 • 10-14 is observed. The application of a novel method for producing ultra-cold atoms showed in first atom interferometric measurements the potential to further reduce the uncertainty to below 10-15.

Paper Details

Date Published: 4 November 2003
PDF: 11 pages
Proc. SPIE 5226, 12th International School on Quantum Electronics: Laser Physics and Applications, (4 November 2003); doi: 10.1117/12.518889
Show Author Affiliations
Juergen Helmcke, Physikalisch-Technische Bundesanstalt (Germany)


Published in SPIE Proceedings Vol. 5226:
12th International School on Quantum Electronics: Laser Physics and Applications
Peter A. Atanasov; Alexander A. Serafetinides; Ivan N. Kolev, Editor(s)

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