Potentialities of an Electro-Optic Crystal Fed by Nuclear Magnetic Resonant Coil for Remote and Low-Invasive Magnetic Field Characterization

In this paper, we demonstrate the use of a LiTaO 3 crystal associated with a typical nuclear magnetic resonant loop coil to perform an optically remote radio frequency magnetic-field characterization. The whole transduction scheme is theoretically and experimentally studied. The measurement dynamics...

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Veröffentlicht in:IEEE sensors journal 2013-04, Vol.13 (4), p.1274-1280
Hauptverfasser: Ayde, R., Gaborit, G., Jarrige, P., Duvillaret, L., Sablong, R., Perrier, A., Beuf, O.
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Sprache:eng
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Zusammenfassung:In this paper, we demonstrate the use of a LiTaO 3 crystal associated with a typical nuclear magnetic resonant loop coil to perform an optically remote radio frequency magnetic-field characterization. The whole transduction scheme is theoretically and experimentally studied. The measurement dynamics reaches 60 dB. The minimum detectable magnetic field is lower than 1 nT, which corresponds to an induced inner crystal electric field as low as 30 mV/m. To evaluate the spatial potentialities of the sensor, a 1-D mapping of the field along an asymmetric butterfly-shaped loop coil is performed. The result is in good agreement with finite-difference time-domain simulations and demonstrates the vectorial behavior of the sensor device.
ISSN:1530-437X
1558-1748
DOI:10.1109/JSEN.2012.2230623