ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS |
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Coherent population trapping magnetometer by differential detecting magneto-optic rotation effect |
Fan Zhang(张樊), Yuan Tian(田原), Yi Zhang(张奕), Si-Hong Gu(顾思洪) |
Key Laboratory of Atomic Frequency Standards, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071, China |
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Abstract A pocket coherent population trapping (CPT) atomic magnetometer scheme that uses a vertical cavity surface emitting laser as a light source is proposed and experimentally investigated. Using the differential detecting magneto-optic rotation effect, a CPT spectrum with the background canceled and a high signal-to-noise ratio is obtained. The experimental results reveal that the sensitivity of the proposed scheme can be improved by half an order, and the ability to detect weak magnetic fields is extended one-fold. Therefore, the proposed scheme is suited to realize a pocket-size CPT magnetometer.
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Received: 09 March 2016
Revised: 13 April 2016
Accepted manuscript online:
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PACS:
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42.50.Gy
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(Effects of atomic coherence on propagation, absorption, and Amplification of light; electromagnetically induced transparency and Absorption)
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07.55.Ge
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(Magnetometers for magnetic field measurements)
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33.57.+c
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(Magneto-optical and electro-optical spectra and effects)
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78.20.Ls
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(Magneto-optical effects)
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Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 11304362 and 61434005). |
Corresponding Authors:
Si-Hong Gu
E-mail: shgu@wipm.ac.cn
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Cite this article:
Fan Zhang(张樊), Yuan Tian(田原), Yi Zhang(张奕), Si-Hong Gu(顾思洪) Coherent population trapping magnetometer by differential detecting magneto-optic rotation effect 2016 Chin. Phys. B 25 094206
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