2017
DOI: 10.1088/0256-307x/34/7/073201
|View full text |Cite
|
Sign up to set email alerts
|

State Preparation in a Cold Atom Clock by Optical Pumping

Abstract: We implement optical pumping to prepare cold atoms in our prototype of the 87Rb 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 μK. We study the dependences of the effective signal gain and pumping efficiency on the pumping laser intensity and detuning. The ef… Show more

Help me understand this report

Search citation statements

Order By: Relevance

Paper Sections

Select...
2
1
1
1

Citation Types

1
4
0

Year Published

2018
2018
2024
2024

Publication Types

Select...
6

Relationship

0
6

Authors

Journals

citations
Cited by 6 publications
(5 citation statements)
references
References 17 publications
1
4
0
Order By: Relevance
“…Furthermore, the width of the resonance peaks in the Raman spectrum can be used to calculate the temperature of the atomic group before the Raman pulse, where the calculation results are 3.0 μK in the M-R method and 4.9 μK in the O-M-R method. Given the average scattered photon number was about n phot ≈ 15, the optical pumping effect would lead to additional heating of the atomic group which can be calculated as ΔT T recoil n phot /3 1.8 μK (T recoil is the recoil temperature of 87 Rb) [31,32], which are consistent with the experimental results. Consequently, the use of optical pumping will bring a large increase in the number of atoms but also a significant increase in the temperature of atoms.…”
Section: Resultssupporting
confidence: 82%
See 1 more Smart Citation
“…Furthermore, the width of the resonance peaks in the Raman spectrum can be used to calculate the temperature of the atomic group before the Raman pulse, where the calculation results are 3.0 μK in the M-R method and 4.9 μK in the O-M-R method. Given the average scattered photon number was about n phot ≈ 15, the optical pumping effect would lead to additional heating of the atomic group which can be calculated as ΔT T recoil n phot /3 1.8 μK (T recoil is the recoil temperature of 87 Rb) [31,32], which are consistent with the experimental results. Consequently, the use of optical pumping will bring a large increase in the number of atoms but also a significant increase in the temperature of atoms.…”
Section: Resultssupporting
confidence: 82%
“…By combining microwave and Raman light during state preparation, the advantages of both can be realized [3,26,27]. In addition, the optical pumping light can be used to pump atoms through spontaneous emissions by employing appropriate polarization [28][29][30][31][32]. This pumping regime not only significantly increases the atomic number but also introduces additional heating effects.…”
Section: Introductionmentioning
confidence: 99%
“…The repump frequency is also simultaneously changed to 6.83 GHz to resonantly drive the F =1 F’ =2 transition. Due to selection rules this pumps of the atoms into the 5 , clock state 34 as seen by the almost complete elimination of the transitions, when scanning the microwave detuning, increasing the contrast of the resulting clock signal. A diagram of all atomic transitions utilised in the experiment is shown in Fig.…”
Section: Methodsmentioning
confidence: 99%
“…We use a two-frequency optical pumping setup 47,48 The coefficient  is the ratio of the average intensities of the magnetic field near the ensemble and the probe coils, which is calculated to be 0.024 in our experiment. The change in the inhomogeneous magnetic field during 20 μs of storage is estimated to be on the order of O(~1*10 -4…”
Section: State Preparation (Sp)mentioning
confidence: 99%