Optically pumped alkali magnetometers for biomedical applications

Weis, A.

doi:10.1051/epn/2012301

Cited by 12 publications

(9 citation statements)

References 11 publications

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“…The spectrum is flat when the RF supply is off (V RF =0), while the central peak and sidebands appear as soon as the voltage increases (see top inset). Given the proof-of-principle nature of the present work and taking into consideration data reported in literature on atomic magnetometers [8][9][10][11][12], one can anticipate a great potential for a further increase in detection capability and range.…”

Section: Response Versus Rf Power and Target Distancementioning

confidence: 88%

Remote detection of rotating machinery with a portable atomic magnetometer

et al. 2017

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We demonstrate remote detection of rotating machinery, using an atomic magnetometer at room temperature and in an unshielded environment. The system relies on the coupling of the AC magnetic signature of the target with the spin-polarized, precessing atomic vapor of a radio-frequency optical atomic magnetometer. The AC magnetic signatures of rotating equipment or electric motors appear as sidebands in the power spectrum of the atomic sensor, which can be tuned to avoid noisy bands that would otherwise hamper detection. A portable apparatus is implemented and experimentally tested. Proof-of-concept investigations are performed with test targets mimicking possible applications, and the operational conditions for optimum detection are determined. Our instrument provides comparable or better performance than a commercial fluxgate and allows detection of rotating machinery behind a wall. These results demonstrate the potential for ultrasensitive devices for remote industrial and usage monitoring, security, and surveillance.

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Section: Response Versus Rf Power and Target Distancementioning

confidence: 88%

Remote detection of rotating machinery with a portable atomic magnetometer

et al. 2017

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“…On the other hand, the operation of atomic magnetometers is much simpler than that of SQUID magnetometers, allowing free and natural movement for patients during the scanning process [7][8][9]. Moreover, the atomic magnetometer has a bandwidth ranging from static to hundreds of kilohertz [10], which can be applied to more fields such as detection of microparticle in size of micrometers [11] and magnetic particle imaging (MPI) [12].…”

Section: Introductionmentioning

confidence: 99%

Optical Rotation Detection for Atomic Spin Precession Using a Superluminescent Diode

et al. 2019

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A superluminescent diode (SLD) as an alternative of laser is used to detect optical rotation for atomic spin precession. A more uniform Gauss configuration without additional beam shaping and a relatively high power of the SLD have a potential for atomic magnetometers, which is demonstrated in theory and experiments. In addition, the robustness and compactness enable a more practical way for optical rotation detections, especially for applications in magnetoencephalography systems.

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“…Magnetic field and the human life is closely linked, in ancient China, one of the four great inventions-compass, is based on the magnetic field to realize the north and south [1,2]. With the development of science, the effect of magnetic field cognition by people gradually, it is not only can detect the earth's resources, also can be used for military anti-submarine and predict earthquakes, even play an important role in biomedical [3]. Based on this reason, the development of the magnetic field measurement technology is very rapid, play an important role in multiple disciplines [4].…”

Section: Introductionmentioning

confidence: 99%

Research on the signal of 4He pump magnetometer sensor using ECDL laser

Wang¹,

Zhou²,

Cheng³

2018

biomedicalresearch

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One of the most important factors determines specifications of 4 He optically pumped magnetometer is the quality of resonance signal given by sensor probe. This paper introduces a laser 4 He optically pumped magnetometer using an ECDL laser. An external cavity length tuning system of ECDL laser based on the double light path atom saturated absorption spectrum method with a 4 He cell is build up to ensure that an effective 1083.207 nm laser light source is provided for the magnetometer probe. It is designed a double path photoelectric detector to get the absorption peak signal by the difference technology. Because signal in accordance with Lorentz linear features, a detection method combined with first and second derivative of signal curve is proposed. Join a modulation signal whose form is dc component add sinusoidal component, the system make ECDL laser give a stable output wavelength around 1083.207 nm. With the laser light, a resonance signal with better quality than the 4 He optically pumped magnetometer probe using the gas discharge lamp light source is given.

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Optically pumped alkali magnetometers for biomedical applications

Abstract: We discuss the principles of atomic magnetometers based on optically detected magnetic resonance (ODMR) and review their biomedical applications.

Cited by 12 publications

References 11 publications

Remote detection of rotating machinery with a portable atomic magnetometer

Remote detection of rotating machinery with a portable atomic magnetometer

Optical Rotation Detection for Atomic Spin Precession Using a Superluminescent Diode

Research on the signal of 4He pump magnetometer sensor using ECDL laser

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