期刊
PHYSICAL REVIEW LETTERS
卷 120, 期 3, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.120.033202
关键词
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资金
- German Federal Ministry of Education and Research (BMBF) within the Quantumtechnologien program [FKZ 13N14439]
- DFG through the DIP program [FO 703/2-1]
- China Scholarship Council
- National Key Research and Development Program of China [2016YFA0302001]
- National Natural Science Foundation of China [11654005, 11234003, 11129402]
- Science and Technology Commission of Shanghai Municipality [16DZ2260200]
The nonlinear Zeeman effect can induce splitting and asymmetries of magnetic-resonance lines in the geophysical magnetic-field range. This is a major source of heading error for scalar atomic magnetometers. We demonstrate a method to suppress the nonlinear Zeeman effect and heading error based on spin locking. In an all-optical synchronously pumped magnetometer with separate pump and probe beams, we apply a radio-frequency field which is in phase with the precessing magnetization. This results in the collapse of the multicomponent asymmetric magnetic-resonance line with similar to 100 Hz width in the Earth-field range into a single peak with a width of 22 Hz, whose position is largely independent of the orientation of the sensor within a range of orientation angles. The technique is expected to be broadly applicable in practical magnetometry, potentially boosting the sensitivity and accuracy of Earth-surveying magnetometers by increasing the magnetic-resonance amplitude, decreasing its width, and removing the important and limiting heading-error systematic.
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