A 87Sr optical lattice clock with 2.9 × 10 −17 uncertainty and its absolute frequency measurement

A 87Sr optical lattice clock with 2.9 × 10 −17 uncertainty and its absolute frequency measurement
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2.9×10×17不确定度的87Sr光晶格钟及其绝对频率测量

DOI:
10.1088/1681-7575/abf33e
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发表时间:
2021-03
期刊:
影响因子:
2.4
通讯作者:
Zhanjun Fang
Zhanjun Fang
中科院分区:
工程技术3区
文献类型:
--
作者:
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

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抽象。本文报道了在中国计量科学研究院(NIM)用30 cm ULE腔作为参考的时钟激光器所获得的~(87)Sr光晶格钟。自2015年首次评估以来,已经进行了几项改进,如原子温度和密度,晶格激光频率稳定,光纤噪声消除等。它的系统频移被仔细评估,总的相对不确定度为2.9 × 10−17。测量的绝对频率为429 228 004 229 873.07(0.13)Hz,相对不确定度为3.1 × 10−16,参考BIPM通过卫星链路在Circular T公告中发布的主频率和副频率标准的集合。
Abstract. We report the 87Sr optical lattice clock at NIM with a clock laser referenced to a 30cm 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.
DOI: 10.1109/tuffc.2012.2209
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