Journal
CHINESE PHYSICS LETTERS
Volume 34, Issue 2, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0256-307X/34/2/020601
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Funding
- National Natural Science Foundation of China [61227805, 91536104, 11574352, 11274349, 91636215]
- Strategic Priority Research Program of the Chinese Academy of Sciences [XDB21030700]
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We report the realization of closed-loop operation of an optical lattice clock based on Yb-171 atoms. We interrogate the 1S(0) -> P-3(0) clock transition using single Rabi pulses of 578nm laser light. The two pi-transitions from m(F) = +/- 1/2 ground states are alternatively interrogated, and the clock laser frequency is locked to the center of the two resonances. The in-loop error signal stability of the clock reaches 3 x 10(-17) for an average time of 3500 s. We also perform interleaved operations of the clock with two independent servo loops, and the fractional frequency difference averages down to 2 x 10(-16) in 7200 s.
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