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arXiv · 2105.10401

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

Qinfang Xu·Xiaotong Lu·Jingjing Xia·Yebing Wang·Hong Chang
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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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Qinfang Xu, Xiaotong Lu, Jingjing Xia, Yebing Wang, Hong Chang. 2021-05-21. Measurement of the probe Stark shift of the 87Sr optical lattice clock using the frequency modulation spectroscopy. https://arxiv.org/abs/2105.10401

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