Measurement of the 5S 1/2 to 5D 5/2 two-photon clock transition frequency of rubidium-85 in high vacuum.
- Resource Type
- Academic Journal
- Authors
- Chu CH; Chang PC; Shih YJ; Luh DA; Chang MS; Liu TW; Lin YT; Chen BW; Cheng WY
- Source
- Publisher: Optica Publishing Group Country of Publication: United States NLM ID: 7708433 Publication Model: Print Cited Medium: Internet ISSN: 1539-4794 (Electronic) Linking ISSN: 01469592 NLM ISO Abbreviation: Opt Lett Subsets: PubMed not MEDLINE; MEDLINE
- Subject
- Language
- English
We present a scheme to precisely resolve the unperturbed line shape of an optical rubidium clock transition in a high vacuum, by which we avoided the systematic errors of "collision shift" and "modulation shift." The spectral resolution resolved by this scheme is significantly improved such that we can use "Zeeman broadening" to inspect the stray magnetic field, through which we were able to compensate the magnetic field inside the Rb cells to be below 10- 3 Gauss. We thus update the absolute frequency of the clock transition and propose a standard operation procedure (SOP) for the clock self-calibration.