Measurement of the probe Stark shift of the 87Sr optical lattice clock using the frequency modulation spectroscopy

2021/05/21 by Qinfang Xu, Xu, Qinfang, Xiaotong Lu +7
Physics and Astronomy · #Applied Physics (physics.app-ph) #Atomic Physics (physics.atom-ph) #FOS: Physical sciences #physics.app-ph #physics.atom-ph

paper · pdf · doi:10.48550/arxiv.2105.10401

arxiv created 2021/05/21 · arxiv updated 2021/05/24

Abstract

With the uncertainty of the optical clocks improving to the order of 10-18, the probe light used to detect the clock transition has demonstrated nonnegligible Stark shift, provoking to precisely evaluate this shift. Here, we demonstrate a frequency modulation technique to realize a large measurement lever arm of the probe Stark shift with no cost of the measurement accuracy of the interleaved stabilization method. This frequency-modulated spectrum is theoretical described and experimental verified. The probe Stark shift coefficient of the 87Sr optical lattice clock is experimentally determined as -(45.97+/-3.51) Hz/(W/cm2) using this frequency modulation spectroscopy.

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