A laser pump-re-pump atomic magnetometer

doi:10.1088/1674-1056/22/12/120702

Abstract We demonstrate experimentally an atomic magnetometer based on optical pumping theory, a magnetic resonance that is induced by a radio frequency field and dependent on the magnetic field strength. Compared with the conventional method using one radiation field, which is used not only as the probe beam but also as a pump beam, the additional re-pump beam can increase remarkably the amplitude of the signal. It is shown that the amplitude of the magnetic field resonance signal can increase more than 55% by using an additional re-pump beam, which makes the sensitivity of the magnetometer higher. Finally, we investigate the relation between amplitude of the signal and re-pump laser power, and calculate the atomic population in the trapping states with rate equations.

Keywords: atomic magnetometer optical pumping sensitivity

Received: 27 November 2012
Revised: 09 May 2013
Accepted manuscript online:

PACS:	07.55.Ge	(Magnetometers for magnetic field measurements)
	76.70.Hb	(Optically detected magnetic resonance (ODMR))
	33.80.Be	(Level crossing and optical pumping)
	42.62.Eh	(Metrological applications; optical frequency synthesizers for precision spectroscopy)

Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 60925022 and 11104243), the Fundamental Research Funds for the Central Universities, China (Grant No. 2012FZA3001), and the National Key Basic Research and Development Program of China (Grant No. 2013CB329501).

Corresponding Authors: Lin Qiang
E-mail: qlin@zju.edu.cn

Cite this article:

Yang Ai-Lin (杨爱林), Yang Guo-Qing (杨国卿), Cai Xun-Ming (蔡勋明), Xu Yun-Fei (徐云飞), Lin Qiang (林强) A laser pump-re-pump atomic magnetometer 2013 Chin. Phys. B 22 120702

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A laser pump-re-pump atomic magnetometer

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