Advances in strontium optical lattice clocks at NIM

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

doi:10.1117/12.2552695

Advances in strontium optical lattice clocks at NIM

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

^*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

1 Citation (Scopus)

Abstract

Two strontium optical lattice clocks (Sr1 and Sr2) are being built at National Institute of Metrology(NIM) of China. Sr1 was firstly evaluated in 2015, and later equipped with a new clock laser based on a 30 cm reference cavity, which helped to improve its stability. Sr2 is built on a new campus of NIM, which has some different designs compared to Sr1, for example, a permanent magnets based Zeeman slower, a differential pumping stage, and a robust laser system. A time interleaved self-comparison campaign of Sr2 of more than 7 days shows an up-time of ∼90% and a measurement stability of 3.7×10^-15/âsooe with a 10 cm ULE cavity based clock laser. The link between these two optical clocks, that consists of two fiber optical frequency combs and a 54 km fiber connection, are being constructed. The comparison of these two clocks is planned in the near future.

Original language	English
Title of host publication	Optical, Opto-Atomic, and Entanglement-Enhanced Precision Metrology II
Editors	Selim M. Shahriar, Jacob Scheuer
Publisher	SPIE
ISBN (Electronic)	9781510633551
DOIs	https://doi.org/10.1117/12.2552695
Publication status	Published - 2020
Externally published	Yes
Event	Optical, Opto-Atomic, and Entanglement-Enhanced Precision Metrology II 2020 - San Francisco, United States Duration: 1 Feb 2020 → 6 Feb 2020

Publication series

Name	Proceedings of SPIE - The International Society for Optical Engineering
Volume	11296
ISSN (Print)	0277-786X
ISSN (Electronic)	1996-756X

Conference

Conference	Optical, Opto-Atomic, and Entanglement-Enhanced Precision Metrology II 2020
Country/Territory	United States
City	San Francisco
Period	1/02/20 → 6/02/20

Keywords

electronic sideband locking
precision spectroscopy
strontium optical lattice clock
time interleaved self-comparison

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10.1117/12.2552695

Cite this

Sun, Z., Yang, T., Lin, Y., Wang, Q., Li, Y., Lu, B., Meng, F., Cao, S., Lin, B., Li, T., & Fang, Z. (2020). Advances in strontium optical lattice clocks at NIM. In S. M. Shahriar, & J. Scheuer (Eds.), Optical, Opto-Atomic, and Entanglement-Enhanced Precision Metrology II Article 112961H (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 11296). SPIE. https://doi.org/10.1117/12.2552695

@inproceedings{b9e2293fb6ea45f689d5eb90e2d5b539,

title = "Advances in strontium optical lattice clocks at NIM",

abstract = "Two strontium optical lattice clocks (Sr1 and Sr2) are being built at National Institute of Metrology(NIM) of China. Sr1 was firstly evaluated in 2015, and later equipped with a new clock laser based on a 30 cm reference cavity, which helped to improve its stability. Sr2 is built on a new campus of NIM, which has some different designs compared to Sr1, for example, a permanent magnets based Zeeman slower, a differential pumping stage, and a robust laser system. A time interleaved self-comparison campaign of Sr2 of more than 7 days shows an up-time of ∼90% and a measurement stability of 3.7×10-15/{\^a}sooe with a 10 cm ULE cavity based clock laser. The link between these two optical clocks, that consists of two fiber optical frequency combs and a 54 km fiber connection, are being constructed. The comparison of these two clocks is planned in the near future.",

keywords = "electronic sideband locking, precision spectroscopy, strontium optical lattice clock, time interleaved self-comparison",

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

note = "Publisher Copyright: {\textcopyright} 2020 SPIE.; Optical, Opto-Atomic, and Entanglement-Enhanced Precision Metrology II 2020 ; Conference date: 01-02-2020 Through 06-02-2020",

year = "2020",

doi = "10.1117/12.2552695",

language = "English",

series = "Proceedings of SPIE - The International Society for Optical Engineering",

publisher = "SPIE",

editor = "Shahriar, {Selim M.} and Jacob Scheuer",

booktitle = "Optical, Opto-Atomic, and Entanglement-Enhanced Precision Metrology II",

address = "United States",

}

Sun, Z, Yang, T, Lin, Y, Wang, Q, Li, Y, Lu, B, Meng, F, Cao, S, Lin, B, Li, T & Fang, Z 2020, Advances in strontium optical lattice clocks at NIM. in SM Shahriar & J Scheuer (eds), Optical, Opto-Atomic, and Entanglement-Enhanced Precision Metrology II., 112961H, Proceedings of SPIE - The International Society for Optical Engineering, vol. 11296, SPIE, Optical, Opto-Atomic, and Entanglement-Enhanced Precision Metrology II 2020, San Francisco, United States, 1/02/20. https://doi.org/10.1117/12.2552695

Advances in strontium optical lattice clocks at NIM. / Sun, Zhen; Yang, Tao; Lin, Yige et al.
Optical, Opto-Atomic, and Entanglement-Enhanced Precision Metrology II. ed. / Selim M. Shahriar; Jacob Scheuer. SPIE, 2020. 112961H (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 11296).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

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AU - Yang, Tao

AU - Lin, Yige

AU - Wang, Qiang

AU - Li, Ye

AU - Lu, Bingkun

AU - Meng, Fei

AU - Cao, Shiying

AU - Lin, Baike

AU - Li, Tianchu

AU - Fang, Zhanjun

PY - 2020

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N2 - Two strontium optical lattice clocks (Sr1 and Sr2) are being built at National Institute of Metrology(NIM) of China. Sr1 was firstly evaluated in 2015, and later equipped with a new clock laser based on a 30 cm reference cavity, which helped to improve its stability. Sr2 is built on a new campus of NIM, which has some different designs compared to Sr1, for example, a permanent magnets based Zeeman slower, a differential pumping stage, and a robust laser system. A time interleaved self-comparison campaign of Sr2 of more than 7 days shows an up-time of ∼90% and a measurement stability of 3.7×10-15/âsooe with a 10 cm ULE cavity based clock laser. The link between these two optical clocks, that consists of two fiber optical frequency combs and a 54 km fiber connection, are being constructed. The comparison of these two clocks is planned in the near future.

AB - Two strontium optical lattice clocks (Sr1 and Sr2) are being built at National Institute of Metrology(NIM) of China. Sr1 was firstly evaluated in 2015, and later equipped with a new clock laser based on a 30 cm reference cavity, which helped to improve its stability. Sr2 is built on a new campus of NIM, which has some different designs compared to Sr1, for example, a permanent magnets based Zeeman slower, a differential pumping stage, and a robust laser system. A time interleaved self-comparison campaign of Sr2 of more than 7 days shows an up-time of ∼90% and a measurement stability of 3.7×10-15/âsooe with a 10 cm ULE cavity based clock laser. The link between these two optical clocks, that consists of two fiber optical frequency combs and a 54 km fiber connection, are being constructed. The comparison of these two clocks is planned in the near future.

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KW - precision spectroscopy

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PB - SPIE

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Y2 - 1 February 2020 through 6 February 2020

ER -

Advances in strontium optical lattice clocks at NIM

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Keywords

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