Optical state selection process with optical pumping in a cesium atomic fountain clock
Lei Han(韩蕾)1, Fang Fang(房芳)2,†, Wei-Liang Chen(陈伟亮)2, Kun Liu(刘昆)2, Ya-Ni Zuo(左娅妮)2, Fa-Song Zheng(郑发松)2, Shao-Yang Dai(戴少阳)2, and Tian-Chu Li(李天初)1,2,‡
1 School of Optics and Photonics, Beijing Institute of Technology, Beijing 100081, China; 2 Key Laboratory of Time and Frequency Standards, National Institute of Metrology(NIM), Beijing 100029, China
Abstract We propose and realize a new optical state selection method on a cesium atomic fountain clock by applying a two-laser 3-3' optical pumping configuration to spin polarize atoms. The atoms are prepared in |F=3, mF=0> clock state with optical pumping directly after being launched up, followed by a pushing beam to push away the atoms remaining in the |F=4> state. With a state selection efficiency exceeding 92%, this optical method can substitute the traditional microwave state selection, and helps to develop a more compact physical package. A Ramsey fringe has been achieved with this optical state selection method, and a contrast of 90% is obtained with a full width half maximum of 0.92 Hz. The short-term frequency stability of 6.8×10-14 (τ/s)-1/2 is acquired. In addition, the number of detected atoms is increased by a factor of 1.7 with the optical state selection.
Fund: Project supported by the National Natural Science Foundation of China (Grant No. 11873044).
Corresponding Authors:
Fang Fang, Tian-Chu Li
E-mail: fangf@nim.ac.cn;litch@nim.ac.cn
Cite this article:
Lei Han(韩蕾), Fang Fang(房芳), Wei-Liang Chen(陈伟亮), Kun Liu(刘昆), Ya-Ni Zuo(左娅妮), Fa-Song Zheng(郑发松), Shao-Yang Dai(戴少阳), and Tian-Chu Li(李天初) Optical state selection process with optical pumping in a cesium atomic fountain clock 2021 Chin. Phys. B 30 080602
[1] Bauch A, Weyers S, Piester D, Stalimuniene E and Yang W 2012 Metrologia49 180 [2] Rosenband T, Hume D B, Schmidt P O, Chou C W, Brusch A, Lorini L, Oskay W H, Drullinger R E, Fortier T M, Stalnaker J E, Diddams S A, Swann W C, Newbury N R, Itano W M, Wineland D J and Bergquist J C 2008 Science319 1808 [3] Wolf P, Chapelet F, Bize S and Clairon A 2006 Phys. Rev. Lett.96 060801 [4] Wynands R and Weyers S 2005 Metrologia42 S64 [5] Fang F, Li M S, Lin P W, Chen W L, Liu N F, Lin Y G, Wang P, Liu K, Suo R and Li T C 2015 Metrologia52 454 [6] Weyers S, Gerginov V, Kazda M, Rahm J, Lipphardt B, Dobrev G and Gibble K 2018 Metrologia55 789 [7] Szymaniec K, Park S E, Marra G and Chalupczak W 2010 Metrologia47 363 [8] Vian C, Rosenbusch P, Marion H, Bize S, Cacciapuoti L, Zhang S, Abgrall M, Chambon D, Maksimovic I, Laurent P, Santarelli G, Clairon A, Luiten A, Tobar M and Salomon C 2005 IEEE Trans. Instrum. Meas.54 833 [9] Guena J, Abgrall M, Rovera D, Laurent P, Chupin B, Lours M, Santarelli G, Rosenbusch P, Tobar M E, Li R X, Gibble K, Clairon A and Bize S 2012 IEEE Trans. Ultrason. Ferroelectr. Freq. Control59 391 [10] Heavner T P, Jefferts S R, Donley E A, Shirley J H and Parker T E 2005 Metrologia42 411 [11] Takamizawa A, Yanagimachi S, Tanabe T, Hagimoto K, Hirano I, Watabe K, Ikegami T and Hartnett J G 2015 IEEE Trans. Instrum. Meas.64 2504 [12] Levi F, Calonico D, Calosso C E, Godone A, Micalizio S and Costanzo G A 2014 Metrologia51 270 [13] Levi F, Lorini L, Calonico D and Godone A 2004 IEEE Trans. Ultrason. Ferroelectr. Freq. Control51 1216 [14] Weyers S, Hubner U, Schroder R, Tamm C and Bauch A 2001 Metrologia38 343 [15] Dai S Y, Zheng F S, Liu K, Chen W L, Lin Y G, Li T C and Fang F 2021 Chin. Phys. B30 013701 [16] Szymaniec K, Noh H R, Park S E and Takamizawa A 2013 Appl. Phys. B111 527 [17] Fang F, Chen W L, Liu K, Liu N F, Suo R and Li T C 2015 Joint Conference of theIEEE International Frequency Control Symposium & the European Frequency and Time Forum, April 12-16, 2015 Denver, USA, pp. 492-494 [18] Santarelli G, Laurent P, Lemonde P, Clairon A, Mann A G, Chang S, Luiten A N and Salomon C 1999 Phys. Rev. Lett.82 4619 [19] Happer W 1972 Rev. Mod. Phys.44 169 [20] Wang Z G, Jiang Q Y, Zhan X, Chen Y D and Luo H 2016 AIP Advances6 085110 [21] Domenico G D, Devenoges L, Dumas C and Thomann P 2010 Phys. Rev. A82 053417 [22] Allred J C, Lyman R N, Kornack T W and Romalis M V 2002 Phys. Rev. Lett.89 130801 [23] Walker T G and Happer W 1997 Rev. Mod. Phys.69 629 [24] Avila G, Giordano V, Candelier V, Clercq E D, Theobald G and Cerez P 1987 Phys. Rev. A36 3719 [25] Han L, Fang F, Chen W L, Liu K, Dai S Y, Zuo Y N and Li T C 2021 Chin. Phys. B30 050602 [26] Fang F, Chen W L, Liu K, Dai S Y, Liu N F, Han L, Zheng F S and Li T C 2019 Joint Conference of the IEEE International Frequency Control Symposium and the European Frequency and Time Forum, April 14-18, 2019, Orlando, USA, 8856067 [27] Dai S Y, Fang F, Liu K, Chen W L, Liu N F, Cao S Y and Li T C 2020 AIP Advances10 065118
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