DocumentCode :
3188699
Title :
Ultracold calcium atoms for an optical frequency standard and cold collision studies
Author :
Degenhardt, C. ; Lisdat, Ch. ; Binnewies, T. ; Wilpers, G. ; Sterr, U. ; Helmeke, J. ; Riehle, F.
Author_Institution :
Phys. Tech. Bundesanstalt, Braunschweig, Germany
fYear :
2003
fDate :
22-27 June 2003
Firstpage :
254
Abstract :
High resolution spectroscopy is performed on ultracold calcium atoms to examine their potential for improving the optical calcium frequency standard in accuracy and stability. The ultracold atoms have been used in asymmetric frequency dependent four pulse Ramsey-Borde interferometers. In contrast to the Doppler cooled atoms the Fourier width of the exciting laser pulses is broader than the Doppler width of the atomic ensemble. This allows almost all atoms to take part in the interferometry. A shelving detection method was applied to the ultracold atoms. To gain a better understanding of cold collisions that lead to frequency shifts in the optical frequency standard, photoassociation spectroscopy (PAS) measurements are performed.
Keywords :
association; atom-atom collisions; atom-photon collisions; calcium; frequency standards; radiation pressure; spectral line shift; Ca; Fourier width; cold collision; four pulse Ramsey-Borde interferometers; frequency shifts; optical frequency standard; photoassociation spectroscopy; ultracold calcium atoms; Atom optics; Atomic beams; Atomic measurements; Calcium; Frequency dependence; Interferometers; Optical interferometry; Optical pulses; Spectroscopy; Stability;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Quantum Electronics Conference, 2003. EQEC '03. European
Print_ISBN :
0-7803-7733-8
Type :
conf
DOI :
10.1109/EQEC.2003.1314111
Filename :
1314111
Link To Document :
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