An Optically Pumped Magnetometer with Omnidirectional Magnetic Field Sensitivity [PDF]
Sensors, 2023 In mobile applications such as geomagnetic surveying, two major effects hamper the use of optically pumped magnetometers: dead zones, sensor orientations where the sensors signal amplitude drops; and heading errors, a dependence of the measured magnetic ...
Volkmar Schultze +2 more
exaly +6 more sources
Theoretical advantages of a triaxial optically pumped magnetometer magnetoencephalography system [PDF]
NeuroImage, 2021 The optically pumped magnetometer (OPM) is a viable means to detect magnetic fields generated by human brain activity. Compared to conventional detectors (superconducting quantum interference devices) OPMs are small, lightweight, flexible, and operate ...
Matthew J Brookes +2 more
exaly +4 more sources
Cross-Axis Dynamic Field Compensation of Optically Pumped Magnetometer Arrays for MEG [PDF]
NeuroImage, 2022 We present dynamic field compensation (DFC), whereby three-axis field measurements from reference magnetometers are used to dynamically maintain null at the alkali vapor cells of an array of primary sensors that are proximal to a subject's scalp ...
Stephen E Robinson +2 more
exaly +4 more sources
Wireless optically pumped magnetometer MEG
NeuroImageThe current magnetoencephalography (MEG) systems, which rely on cables for control and signal transmission, do not fully realize the potential of wearable optically pumped magnetometers (OPM). This study presents a significant advancement in wireless OPM-
Pan Liao, Dongxu Li, Bingjiang Lyu
exaly +5 more sources
An Optically Pumped Magnetometer Working in the Light-Shift Dispersed Mz Mode [PDF]
Sensors, 2017 We present an optically pumped magnetometer working in a new operational mode—the light-shift dispersed Mz (LSD-Mz) mode. It is realized combining various features; (1) high power off-resonant optical pumping; (2) Mz configuration, where pumping light ...
Volkmar Schultze +2 more
exaly +4 more sources
Drug Monitoring by Optically Pumped Atomic Magnetometer
IEEE Photonics Journal, 2022 A novel drug monitoring method is experimentally demonstrated by optically pumped atomic magnetometer. An elliptically polarized single-beam spin-exchange-relaxation-free atomic magnetometer (SERF AM) is used to realize magnetorelaxometry (MRX ...
Xiang He, Zhiwen Zhang, Qiang Lin
exaly +4 more sources
Spatial and Frequency Specific Artifact Reduction in Optically Pumped Magnetometer Recordings. [PDF]
J Integr Neurosci, 2022 Background: Magnetoencephalography (MEG) based on optically pumped magnetometers (OPMs) opens up new opportunities for brain research. However, OPM recordings are associated with artifacts.
Xiang J +3 more
europepmc +2 more sources
Phantom-Based Approach for Comparing Conventional and Optically Pumped Magnetometer Magnetoencephalography Systems. [PDF]
Sensors (Basel)Magnetoencephalography (MEG) is a vital tool for understanding neural dynamics, offering a noninvasive technique for measuring subtle magnetic field variations around the scalp generated by synchronized neuronal activity.
Oyama D, Zaatiti H.
europepmc +2 more sources
Early insights into eyeblink conditioning using optically pumped magnetometer-based MEG. [PDF]
Front Hum NeurosciIntroductionThere is a profound lack of electrophysiological data from the cerebellum in humans, as compared to animals, because it is difficult to record cerebellar activity non-invasively using magnetoencephalography (MEG) or electroencephalography ...
Lin CS +6 more
europepmc +2 more sources
A Multi-Pass Optically Pumped Rubidium Atomic Magnetometer with Free Induction Decay
Sensors, 2022 A free-induction-decay (FID) type optically-pumped rubidium atomic magnetometer driven by a radio-frequency (RF) magnetic field is presented in this paper.
Lulu Zhang, Junmin Wang, Wang Junmin
exaly +3 more sources