Magnetic induction measurements using an all-optical 87Rb atomic magnetometer

Wickenbrock, Arne; Tricot, François; Renzoni, Ferruccio

doi:10.1063/1.4848196

Cited by 23 publications

(10 citation statements)

References 11 publications

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“…Particularly, the reduced role of the static magnetic-field fluctuations on the performance of the AC magnetometer, operating within a range up to 1 MHz, opens avenues toward unshielded detection of oscillating fields. This may be particularly interesting in detection of magnetic particles 25 , nuclear magnetic resonance 24 , magnetic resonance imaging in ultra-low fields 9 , nuclear quadrupole resonance 27 , and inductive detection of metals 26,28,29 .…”

Section: Discussionmentioning

confidence: 99%

Different sensitivities of two optical magnetometers realized in the same experimental arrangement

Put

Popiołek

Pustelny

2019

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In this article, operation of optical magnetometers detecting static (DC) and oscillating (AC) magnetic fields is studied and comparison of the devices is performed. To facilitate the comparison, the analysis is carried out in the same experimental setup, exploiting nonlinear magneto-optical rotation. In such a system, a control over static-field magnitude or oscillating-field frequency provides detection of strength of the DC or AC fields. Polarization rotation is investigated for various light intensities and AC-field amplitudes, which allows to determine optimum sensitivity to both fields. With the results, we demonstrate that under optimal conditions the AC magnetometer is about ten times more sensitive than its DC counterpart, which originates from different response of the atoms to the fields. Bandwidth of the magnetometers is also analyzed, revealing its different dependence on the light power. Particularly, we demonstrate that bandwidth of the AC magnetometer can be significantly increased without strong deterioration of the magnetometer sensitivity. This behavior, combined with the ability to tune the resonance frequency of the AC magnetometer, provide means for ultra-sensitive measurements of the AC field in a broad but spectrally-limited range, where detrimental role of static-field instability is significantly reduced.

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Section: Discussionmentioning

confidence: 99%

Different sensitivities of two optical magnetometers realized in the same experimental arrangement

Put

Popiołek

Pustelny

2019

Sci Rep

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“…4 However, the MIT instrument inevitably suffers from the limitations of the magnetic sensor, in particular sensitivity and low-frequency noise and, in the case of GMR sensors, hysteresis and temperature dependence. 12,13 The recent demonstration of MIT with optical atomic magnetometers, 14,15 as anticipated, opens new perspectives in many fields, as discussed in the following.…”

Section: Magnetic Induction Tomographymentioning

confidence: 99%

Magnetic induction imaging with optical atomic magnetometers: towards applications to screening and surveillance

et al. 2015

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We propose a new approach, based on optical atomic magnetometers and magnetic induction tomography (MIT), for remote and non-invasive detection of conductive targets. Atomic magnetometers overcome the main limitations of conventional MIT instrumentation, in particular their poor low-frequency sensitivity, their large size and their limited scalability. Moreover, atomic magnetometers have been proven to reach extremely high sensitivities, with an improvement of up to 7 orders of magnitude in the 50 MHz to DC band, with respect to a standard pickup coil of the same size. In the present scheme, an oscillating magnetic field induces eddy currents in a conductive target and laser-pumped atomic magnetometers, either stand-alone or in an array, detect the response of the objects. A phase-sensitive detection scheme rejects the background, allowing remote detection of the secondary field and, thus, mapping of objects, hidden in cargos, underwater or underground. The potential for extreme sensitivity, miniaturization, dynamic range and array operation paves the way to a new generation of non-invasive, active detectors for surveillance, as well as for real-time cargo screening.

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“…In [16] an all-optical atomic magnetometer in selfoscillating mode [17] was used to demonstrate the application of atomic magnetometers for magnetic induction measurements. This technique was then used to create magnetic induction tomographic (MIT) maps of different metallic objects [18].…”

Section: Introductionmentioning

confidence: 99%

“…We first present the experimental setup and its char-arXiv:1603.05067v1 [physics.ins-det] 16 Mar 2016 acterization; then describe the experimental procedure to perform spatially resolved eddy-current measurements and present the results for a selection of different sample geometries. These include the image of a conductive ring with a 1 mm slit as an example relevant to crack detection.…”

Section: Introductionmentioning

confidence: 99%

Eddy current imaging with an atomic radio-frequency magnetometer

Wickenbrock

Leefer

Blanchard

et al. 2016

Applied Physics Letters

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We use a radio-frequency 85 Rb alkali-vapor cell magnetometer based on a paraffin-coated cell with long spin-coherence time and a small, low-inductance driving coil to create highly resolved conductivity maps of different objects. We resolve sub-mm features in conductive objects, we characterize the frequency response of our technique, and by operating at frequencies up to 250 kHz we are able to discriminate between differently conductive materials based on the induced response. The method is suited to cover a wide range of driving frequencies and can potentially be used for detecting non-metallic objects with low DC conductivity.

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Magnetic induction measurements using an all-optical 87Rb atomic magnetometer

Cited by 23 publications

References 11 publications

Different sensitivities of two optical magnetometers realized in the same experimental arrangement

Different sensitivities of two optical magnetometers realized in the same experimental arrangement

Magnetic induction imaging with optical atomic magnetometers: towards applications to screening and surveillance

Eddy current imaging with an atomic radio-frequency magnetometer

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