摘要We propose and experimentally investigate a coherent population trapping state based magnetometer prototype with 87Rb atoms. Through modulating Zeeman sublevels with an ac magnetic field, not only a phase sensitive detection scheme suitable for miniature magnetometer is realized, but also the detection resolution of magnetic field intensity could be improved by a factor of two. Our study result indicates that it is a promising low power consumption miniature sensitive low magnetic field sensor offering spatially resolved measurement at the sub-millimetre level.
Abstract：We propose and experimentally investigate a coherent population trapping state based magnetometer prototype with 87Rb atoms. Through modulating Zeeman sublevels with an ac magnetic field, not only a phase sensitive detection scheme suitable for miniature magnetometer is realized, but also the detection resolution of magnetic field intensity could be improved by a factor of two. Our study result indicates that it is a promising low power consumption miniature sensitive low magnetic field sensor offering spatially resolved measurement at the sub-millimetre level.
LIU Guo-Bin;DU Run-Chang;LIU Chao-Yang;GU Si-Hong. CPT Magnetometer with Atomic Energy Level Modulation[J]. 中国物理快报, 2008, 25(2): 472-474.
LIU Guo-Bin, DU Run-Chang, LIU Chao-Yang, GU Si-Hong. CPT Magnetometer with Atomic Energy Level Modulation. Chin. Phys. Lett., 2008, 25(2): 472-474.
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