Optical frequency measurements of 6s 2S 1/2 6p 2P 3/2 transition in a 133Cs atomic beam using a femtosecond laser frequency comb

Details Optical frequency measurements of 6s 2S 1/2 6p 2P 3/2 transition in a 133Cs atomic beam using a femtosecond laser frequency comb Optical frequency measurements of 6s 2S 1/2 6p 2P 3/2 transition in a 133Cs atomic beam using a femtosecond laser frequency comb

Oct 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004phrva..70d2505g&link_type=abstract

Physical Review A, vol. 70, Issue 4, id. 042505

Physics

14

Atomic Spectra, Laser Spectroscopy, Modulation, Tuning, And Mode Locking

Scientific paper

Optical frequencies of the hyperfine components of the D2 line in 133Cs are determined using high-resolution spectroscopy and a femtosecond laser frequency comb. A narrow-linewidth probe laser excites the 6s 2S 1/2 (F=3,4) →6p 2P 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 5× 10-6 rad . The final uncertainties (˜±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 2S 1/2 →6p 2P 3/2 transition to be fD2 =351 725 718.4744 (51) MHz .

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