Advanced Plasmonic Fiber-Optic Sensor for High Sensitivity Measurement of Magnetic Field



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Rodriguez Schwendtner, Eva María and Navarrete Fernández, María Cruz and Díaz Herrera, Natalia and González Cano, Agustín and Esteban Martínez, Óscar (2019) Advanced Plasmonic Fiber-Optic Sensor for High Sensitivity Measurement of Magnetic Field. IEEE Sensors journal, 19 (17). pp. 7355-7364. ISSN 1558-1748

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An advanced plasmonic sensor for high sensitivity measurement of magnetic field is presented. It is based on the combination of a SPR refractometer (doubly-deposited tapered optical fiber) with magnetic fluids used as transducers. The device is compact and robust and has been theoretically analyzed and completely characterized, showing a very good experimental performance. We have studied the dependence of the response of the device with the direction of the field, confirming that, as expected, the sense of the variation of the refractive index is opposite for parallel and perpendicular fields, which is an interesting feature for practical applications. We have also evaluated the dependence on the concentration of the employed magnetic fluid and the influence of the chosen type of ferrofluid. In all these measurements the sensitivity experimentally obtained is amongst the highest reported in the literature for this kind of devices and we have extended the dynamic range. Finally, we have applied a novel, auto-referential, signal processing algorithm to the measurements, showing its possibilities. The obtained experimental results demonstrate the feasibility and the advantages of the application of SPR fiber-optic sensors to magnetic field measurements.

Item Type:Article
Additional Information:

Manuscript received April 11, 2019; revised May 8, 2019; accepted
May 8, 2019. Date of publication May 10, 2019; date of current version August 6, 2019

Uncontrolled Keywords:Surface plasmon resonance, Magnetic fluids, Optical fiber sensors, Magnetic field measurement.
Subjects:Sciences > Physics > Electromagnetism
Medical sciences > Optics > Physical optics
ID Code:47637
Deposited On:30 Sep 2019 11:46
Last Modified:01 Oct 2019 09:52

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