Detection of radio-frequency magnetic fields using nonlinear magneto-optical rotation

被引:58
作者
Ledbetter, M. P. [1 ]
Acosta, V. M.
Rochester, S. M.
Budker, D.
Pustelny, S.
Yashchuk, V. V.
机构
[1] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA
[2] Jagiellonian Univ, Centrum Badan Magnetooptycznych, Inst Fizyki M Smoluchowskiego, PL-30059 Krakow, Poland
[3] Lawrence Berkeley Natl Lab, Adv Light Source Div, Berkeley, CA 94720 USA
来源
PHYSICAL REVIEW A | 2007年 / 75卷 / 02期
关键词
D O I
10.1103/PhysRevA.75.023405
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
We describe a room-temperature alkali-metal atomic magnetometer for detection of small, high-frequency magnetic fields. The magnetometer operates by detecting optical rotation due to the precession of an aligned ground state in the presence of a small oscillating magnetic field. The resonance frequency of the magnetometer can be adjusted to any desired value by tuning the bias magnetic field. Based on experimentally measured signal-to-noise ratio, we demonstrate a sensitivity of 100 pG/root Hz (rms) in a 3.5-cm-diameter paraffin coated cell. Assuming detection at the photon shot-noise limit, we project a sensitivity as low as 25 pG root Hz (rms).
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页数:6
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