State Preparation in a Cold Atom Clock by Optical Pumping
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Abstract
We implement optical pumping to prepare cold atoms in our prototype of the Rb space cold atom clock, which operates in the one-way mode. Several modifications are made on our previous physical and optical system. The effective atomic signal in the top detection zone is increased to 2.5 times with 87% pumping efficiency. The temperature of the cold atom cloud is increased by 1.4 K. We study the dependences of the effective signal gain and pumping efficiency on the pumping laser intensity and detuning. The effects of transition are discussed. This technique may be used in the future space cold atom clocks. -
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References
[1] Riehle F 2006 Frequency Standards: Basics and Applications John Wiley & Sons chap 7 p 223[2] Wynands R and Weyers S 2005 Metrologia 42 S64 doi: 10.1088/0026-1394/42/3/S08[3] Tremblay P and Jacques C 1990 Phys. Rev. A 41 4989 doi: 10.1103/PhysRevA.41.4989[4] Avila G et al. 1987 Phys. Rev. A 36 3719 doi: 10.1103/PhysRevA.36.3719[5] Ohshima S, Nakadan Y S and Koga Y 1988 IEEE Trans. Instrum. Meas. 37 409 doi: 10.1109/19.7465[6] Di Domenico G et al. 2010 Phys. Rev. A 82 053417 doi: 10.1103/PhysRevA.82.053417[7] Chalupczak W and Szymaniec K 2005 Phys. Rev. A 71 053410 doi: 10.1103/PhysRevA.71.053410[8] Szymaniec K et al. 2013 Appl. Phys. B 111 527 doi: 10.1007/s00340-013-5368-7[9] Szymaniec K and Park S E 2011 IEEE Trans. Instrum. Meas. 60 2475 doi: 10.1109/TIM.2010.2088430[10] Takamizawa A et al. 2015 IEEE Trans. Instrum. Meas. 64 2504 doi: 10.1109/TIM.2015.2415015[11] Fang F et al. 2015 Frequency Control Symposium & the European Frequency and Time Forum FCS, 2015 Joint Conference of the IEEE International Denver, USA 12–16 April 2015 p 492[12] Ren W et al. 2016 Chin. Phys. B 25 060601 doi: 10.1088/1674-1056/25/6/060601[13] Qu Q Z et al. 2015 Chin. J. Laser B 42 0902006 in Chinese doi: 10.3788/CJL201542.0902006[14] Lü D S et al. 2011 Chin. Phys. Lett. 28 063201 doi: 10.1088/0256-307X/28/6/063201[15] Wang B et al. 2011 Chin. Phys. Lett. 28 063701 doi: 10.1088/0256-307X/28/6/063701[16] Qu Q Z et al. 2015 Chin. Opt. Lett. 13 061405 doi: 10.3788/COL201513.061405[17] Zhang S S et al. 2016 Chin. Phys. B 25 114203 doi: 10.1088/1674-1056/25/11/114203[18] Wang L R et al. 2015 Chin. Phys. B 24 063201 doi: 10.1088/1674-1056/24/6/063201[19] Wang P J et al. 2011 Chin. Phys. B 20 016701 doi: 10.1088/1674-1056/20/1/016701[20] Théobald G et al. 1989 Opt. Commun. 71 256 doi: 10.1016/0030-40188990004-7[21] Dalton B J, McDuff R and Knight P L 1985 Opt. Acta 32 61 doi: 10.1080/713821645 -
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