Sensitive magnetometry based on nonlinear magneto-optical rotation

被引:283
作者
Budker, D [1 ]
Kimball, DF
Rochester, SM
Yashchuk, VV
Zolotorev, M
机构
[1] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA
[2] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Nucl Sci, Berkeley, CA 94720 USA
[3] Univ Calif Berkeley, Lawrence Berkeley Lab, Ctr Beam Phys, Berkeley, CA 94720 USA
来源
PHYSICAL REVIEW A | 2000年 / 62卷 / 04期
关键词
D O I
10.1103/PhysRevA.62.043403
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
Application of nonlinear magneto-optical (Faraday) rotation to magnetometry is investigated. Our experimental setup consists of a modulation polarimeter that measures rotation of the polarization plane of a laser beam resonant with transitions in Rb. Rb vapor is contained in an evacuated cell with antirelaxation coating that enables atomic ground-state polarization to survive many thousand wall collisions. This leads to ultranarrow features (similar to 10(-6) G) in the magnetic-field dependence of optical rotation. The potential sensitivity of this scheme to sub-mu G magnetic fields as a function of atomic density, light intensity, and light frequency is investigated near the D1 and D2 lines of Rb-85. It is shown that through an appropriate choice of parameters the shot-noise-limited sensitivity to small magnetic fields can reach 3x10(-12) G/root Hz.
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页数:7
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