A87Sr optical lattice clock with 2.9 × 10-17uncertainty and its absolute frequency measurement

Yige Lin; Qiang Wang; Fei Meng; Shiying Cao; Yuzhuo Wang; Ye Li; Zhen Sun; Bingkun Lu; Tao Yang; Baike Lin; Aimin Zhang; Fang Fang; Zhanjun Fang

doi:10.1088/1681-7575/abf33e

A⁸⁷Sr optical lattice clock with 2.9 × 10^-17uncertainty and its absolute frequency measurement

Yige Lin^*
, Qiang Wang
, Fei Meng
, Shiying Cao
, Yuzhuo Wang
, Ye Li
, Zhen Sun
, Bingkun Lu
, Tao Yang
, Baike Lin
, Aimin Zhang
, Fang Fang
, Zhanjun Fang

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

37 Citations (Scopus)

Abstract

We report the 87Sr optical lattice clock at NIM with a clock laser referenced to a 30 cm ULE cavity. Several improvements, such as the atomic temperature and density, the lattice laser frequency stabilization, the fiber noise cancellation, etc, have been made since its first evaluation in 2015. Its systematic frequency shifts are carefully evaluated with a total relative uncertainty of 2.9 × 10-17. The measured absolute frequency is 429, 228, 004, 229, 873.07(0.13) Hz with a relative uncertainty of 3.1 × 10-16, with reference to the ensemble of primary and secondary frequency standards published in the Circular T bulletin by BIPM through a satellite link.

Original language	English
Article number	035010
Journal	Metrologia
Volume	58
Issue number	3
DOIs	https://doi.org/10.1088/1681-7575/abf33e
Publication status	Published - Jun 2021
Externally published	Yes

Keywords

absolute frequency measurement
atomic clock
optical lattice
strontium
systematic shift evaluation

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10.1088/1681-7575/abf33e

Cite this

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title = "A87Sr optical lattice clock with 2.9 × 10-17uncertainty and its absolute frequency measurement",

abstract = "We report the 87Sr optical lattice clock at NIM with a clock laser referenced to a 30 cm ULE cavity. Several improvements, such as the atomic temperature and density, the lattice laser frequency stabilization, the fiber noise cancellation, etc, have been made since its first evaluation in 2015. Its systematic frequency shifts are carefully evaluated with a total relative uncertainty of 2.9 × 10-17. The measured absolute frequency is 429, 228, 004, 229, 873.07(0.13) Hz with a relative uncertainty of 3.1 × 10-16, with reference to the ensemble of primary and secondary frequency standards published in the Circular T bulletin by BIPM through a satellite link.",

keywords = "absolute frequency measurement, atomic clock, optical lattice, strontium, systematic shift evaluation",

author = "Yige Lin and Qiang Wang and Fei Meng and Shiying Cao and Yuzhuo Wang and Ye Li and Zhen Sun and Bingkun Lu and Tao Yang and Baike Lin and Aimin Zhang and Fang Fang and Zhanjun Fang",

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doi = "10.1088/1681-7575/abf33e",

language = "English",

volume = "58",

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T1 - A87Sr optical lattice clock with 2.9 × 10-17uncertainty and its absolute frequency measurement

AU - Lin, Yige

AU - Wang, Qiang

AU - Meng, Fei

AU - Cao, Shiying

AU - Wang, Yuzhuo

AU - Li, Ye

AU - Sun, Zhen

AU - Lu, Bingkun

AU - Yang, Tao

AU - Lin, Baike

AU - Zhang, Aimin

AU - Fang, Fang

AU - Fang, Zhanjun

PY - 2021/6

Y1 - 2021/6

N2 - We report the 87Sr optical lattice clock at NIM with a clock laser referenced to a 30 cm ULE cavity. Several improvements, such as the atomic temperature and density, the lattice laser frequency stabilization, the fiber noise cancellation, etc, have been made since its first evaluation in 2015. Its systematic frequency shifts are carefully evaluated with a total relative uncertainty of 2.9 × 10-17. The measured absolute frequency is 429, 228, 004, 229, 873.07(0.13) Hz with a relative uncertainty of 3.1 × 10-16, with reference to the ensemble of primary and secondary frequency standards published in the Circular T bulletin by BIPM through a satellite link.

AB - We report the 87Sr optical lattice clock at NIM with a clock laser referenced to a 30 cm ULE cavity. Several improvements, such as the atomic temperature and density, the lattice laser frequency stabilization, the fiber noise cancellation, etc, have been made since its first evaluation in 2015. Its systematic frequency shifts are carefully evaluated with a total relative uncertainty of 2.9 × 10-17. The measured absolute frequency is 429, 228, 004, 229, 873.07(0.13) Hz with a relative uncertainty of 3.1 × 10-16, with reference to the ensemble of primary and secondary frequency standards published in the Circular T bulletin by BIPM through a satellite link.

KW - absolute frequency measurement

KW - atomic clock

KW - optical lattice

KW - strontium

KW - systematic shift evaluation

UR - https://www.scopus.com/pages/publications/85105757049

U2 - 10.1088/1681-7575/abf33e

DO - 10.1088/1681-7575/abf33e

M3 - Article

AN - SCOPUS:85105757049

SN - 0026-1394

VL - 58

JO - Metrologia

JF - Metrologia

IS - 3

M1 - 035010

ER -

A⁸⁷Sr optical lattice clock with 2.9 × 10^-17uncertainty and its absolute frequency measurement

Abstract

Keywords

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