Optical frequency measurements of 6s {sup 2}S{sub 1/2}-6p {sup 2}P{sub 3/2} transition in a {sup 133}Cs atomic beam using a femtosecond laser frequency comb
- Department of Physics, University of Notre Dame, Notre Dame, Indiana 46556-5670 (United States)
Optical frequencies of the hyperfine components of the D{sub 2} line in {sup 133}Cs are determined using high-resolution spectroscopy and a femtosecond laser frequency comb. A narrow-linewidth probe laser excites the 6s {sup 2}S{sub 1/2}(F=3,4){yields}6p {sup 2}P{sub 3/2}(F=2,3,4,5) transition in a highly collimated atomic beam. Fluorescence spectra are taken by scanning the laser frequency over the excited-state hyperfine structure. The laser optical frequency is referenced to a Cs fountain clock via a reference laser and a femtosecond laser frequency comb. A retroreflected laser beam is used to estimate and minimize the Doppler shift due to misalignment between the probe laser and the atomic beam. We achieve an angular resolution on the order of 5x10{sup -6} rad. The final uncertainties ({approx}{+-}5 kHz) in the frequencies of the optical transitions are a factor of 20 better than previous results [T. Udem et al., Phys. Rev. A 62, 031801 (2000).]. We find the centroid of the 6s {sup 2}S{sub 1/2}{yields}6p {sup 2}P{sub 3/2} transition to be f{sub D2}=351 725 718.4744(51) MHz.
- OSTI ID:
- 20646357
- Journal Information:
- Physical Review. A, Vol. 70, Issue 4; Other Information: DOI: 10.1103/PhysRevA.70.042505; (c) 2004 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1050-2947
- Country of Publication:
- United States
- Language:
- English
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