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Magic wavelengths for a lattice trapped rubidium four-level active optical clock

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Original languageEnglish
Article number090601
JournalChinese Physics Letters
Issue number9
Publication statusPublished - Sep 2012
Publication typeA1 Journal article-refereed


After being pumped from the 5s 1/2 ground state to the 6p 1/2 state, the population inversion between 6s 1/2 and 5p 1/2,3/2 can be established for a rubidium four-level active optical clock. We calculate the ac Stark shift due to lattice trapping laser which dominates the frequency shift of clock transition in a lattice trapped rubidium four-level active optical clock. Several magic wavelengths are found, which can form desired optical lattice trapping potential. By choosing a proper intensity and linewidth of the trapping laser, the fractional frequency uncertainty of clock transition due to the ac Stark shift of the trapping laser, is estimated to be below 10 -18.

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