Indirect pumping bell-bloom magnetometer

doi:10.1088/1674-1056/26/10/100701

Abstract When the ground state hyperfine splitting of alkali metal vapor atoms is well optically resolved, the spin coherence on one hyperfine sublevel can be generated directly or indirectly by pumping the same or the other sublevel respectively. We experimentally studied the pump power dependence of the field response of a Bell-Bloom magnetometer for the two pumping schemes in a paraffin coated ⁸⁷Rb vapor cell. We find that although the maximum field response is achieved by combining the two pumping schemes, indirect pumping alone can do nearly as good while being much simpler to operate. We have achieved a sensitivity of 100 fT/Hz^1/2 with a single indirect pump at room temperature.

Keywords: indirect pumping anti-relaxation coating power broadening magnetometry

Received: 10 April 2017
Revised: 08 June 2017
Accepted manuscript online:

PACS:	07.55.Ge	(Magnetometers for magnetic field measurements)
	32.80.Xx	(Level crossing and optical pumping)
	76.60.Es	(Relaxation effects)
	76.70.Hb	(Optically detected magnetic resonance (ODMR))

Fund: Project supported by the Natural Science Foundation of Shanghai (Grant No. 16ZR1402700), the National Natural Science Foundation of China (Grant No. 91636102), and the National Key Research and Development Program of China (Grant No. 2016YFA0302000).

Corresponding Authors: Kai-Feng Zhao
E-mail: zhaokf@fudan.edu.cn

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Meng-Bing Wang(王梦冰), Da-Fa Zhao(赵大法), Gui-Ying Zhang(张桂迎), Kai-Feng Zhao(赵凯锋) Indirect pumping bell-bloom magnetometer 2017 Chin. Phys. B 26 100701

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[1]	Study of the optimal duty cycle and pumping rate for square-wave amplitude-modulated Bell-Bloom magnetometers Mei-Ling Wang(王美玲), Meng-Bing Wang(王梦冰), Gui-Ying Zhang(张桂迎), Kai-Feng Zhao(赵凯锋). Chin. Phys. B, 2016, 25(6): 060701.

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