Measurement of the 5S1/2 to 5D5/2 two-photon clock transition frequency of rubidium-85 in high vacuum

Chi Hsiang Chu, Po Cheng Chang, Yu Jhe Shih, Dah An Luh, Ming Shien Chang, Tze Wei Liu, Yi Ting Lin, Bo Wei Chen, Wang Yau Cheng

Research output: Contribution to journalArticlepeer-review

Abstract

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.

Original languageEnglish
Pages (from-to)5984-5987
Number of pages4
JournalOptics Letters
Volume48
Issue number22
DOIs
StatePublished - 15 Nov 2023

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