High contrast atomic magnetometer based on coherent population trapping

doi:10.1088/1674-1056/23/2/027601

Abstract We present an experimental and theoretical investigation of the coherent population trapping (CPT) resonance excited on the D1 line of ⁸⁷Rb atoms by bichromatic linearly polarized laser light. The experimental results show that a lin‖lin transition scheme is a promising alternative to the conventional circular–circular transition scheme for an atomic magnetometer. Compared with the circular light transition scheme, linear light accounts for high-contrast transmission resonances, which makes this excitation scheme promising for high-sensitivity magnetometers. We also use linear light and circular light to detect changes of a standard magnetic field, separately.

Keywords: high contrast atomic magnetometer coherent population trapping

Received: 28 December 2012
Revised: 28 September 2013
Accepted manuscript online:

PACS:	76.70.Hb	(Optically detected magnetic resonance (ODMR))
	42.62.Eh	(Metrological applications; optical frequency synthesizers for precision spectroscopy)
	42.50.Gy	(Effects of atomic coherence on propagation, absorption, and Amplification of light; electromagnetically induced transparency and Absorption)
	32.10.Dk	(Electric and magnetic moments, polarizabilities)

Fund: Project supported by the National Basic Research Program of China (Grant No. 2013CB329501), the National Natural Science Foundation of China (Grant Nos. 60925022 and 11125863), and the Fundamental Research Funds for the Central Universities (Grant No. 2012FZA3001).

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

About author: 76.70.Hb; 42.62.Eh; 42.50.Gy; 32.10.Dk

Cite this article:

Yang Ai-Lin (杨爱林), Yang Guo-Qing (杨国卿), Xu Yun-Fei (徐云飞), Lin Qiang (林强) High contrast atomic magnetometer based on coherent population trapping 2014 Chin. Phys. B 23 027601

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