SERF-OPM Usability for MEG in Two-Layer-Shielded Rooms

Jazbinsek, V.; Marhl, Urban; Sander, Tilmann

doi:10.1007/978-3-031-05363-4_10

Cited by 4 publications

(3 citation statements)

References 27 publications

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“…The magnetic shields consist of multiple layers with high permeability materials. 31,32 The magnetic coils driven by electric currents further cancel the residual field under 5 nT. 33 Moreover, the modulation signal for the Lorentz line shape is also achieved by those coils.…”

Section: The Current Development Of Fiber-coupled Ammentioning

confidence: 98%

“…components of the AM, which contains an alkali vapor cell, heater, magnetic coils, pump and probe light modules, and magnetic shields. The magnetic shields consist of multiple layers with high permeability materials 31,32 . The magnetic coils driven by electric currents further cancel the residual field under 5 nT 33 .…”

Section: The Current Development Of Fiber‐coupled Ammentioning

confidence: 99%

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A review of fiber‐coupled atomic magnetometer

Liu

Yang

et al. 2022

Micro & Optical Tech Letters

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Fiber-coupled atomic magnetometer (AM) based on a spin-exchange relaxation-free (SERF) regime has been a promising candidate for cryogenic devices for traditional magnetoencephalography (MEG) systems, as it has a flexible structure and a small lateral section for biomedical applications. The principles, key technologies, and applications of fiber-coupled AM based on the atomic spin effect are reviewed in this paper. The principle of fibercoupled AM is introduced, the characteristics of conventional and fibercoupled AMs are compared, and the development history and current situation are reviewed. In addition, according to the demands for MEG applications, the key technologies of fiber-coupled AM are summarized, and the bottleneck problems and future development directions for weak magnetic measurement are analyzed.

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Section: The Current Development Of Fiber-coupled Ammentioning

confidence: 98%

Section: The Current Development Of Fiber‐coupled Ammentioning

confidence: 99%

A review of fiber‐coupled atomic magnetometer

Liu

Yang

et al. 2022

Micro & Optical Tech Letters

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“…MEG normally requires the detection of both magnetic fields and magnetic field gradients, with the latter enabling higher spatial resolution and better localization of the biomagnetic source [25][26][27][28]. In general, the measurement of the small magnetic fields produced by the human body is strongly affected by environmental magnetic field noise, whose cancellation and shielding is expensive and cumbersome [21,[29][30][31]. Measuring magnetic field gradients can help in circumventing or simplifying this problem.…”

Section: Introductionmentioning

confidence: 99%

An optically pumped magnetic gradiometer for the detection of human biomagnetism

Cook,

Bezsudnova,

Koponen

et al. 2024

Quantum Sci. Technol.

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We realise an intrinsic optically pumped magnetic gradiometer based on non-linear magneto-optical rotation. We show that our sensor can reach a gradiometric sensitivity of 18 fT/cm/√Hz and can reject common mode homogeneous magnetic field noise with up to 30 dB attenuation. We demonstrate that our magnetic field gradiometer is sufficiently sensitive and resilient to be employed in biomagnetic applications. In particular, we are able to record the auditory evoked response of the human brain, and to perform real-time magnetocardiography in the presence of external magnetic field disturbances. Our gradiometer provides complementary capabilities in human biomagnetic sensing to optically pumped magnetometers, and opens new avenues in the detection of human biomagnetism.

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