Results 31 to 40 of about 202,952 (145)

Biomagnetism: The First Sixty Years

Sensors, 2023
Biomagnetism is the measurement of the weak magnetic fields produced by nerves and muscle. The magnetic field of the heart—the magnetocardiogram (MCG)—is the largest biomagnetic signal generated by the body and was the first measured.
Bradley J. Roth
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Triaxial closed-loop measurement based on a single-beam zero-field optically pumped magnetometer

Frontiers in Physics, 2022
In this study, we propose an approach for the simultaneous measurement of triaxial magnetic fields using a single-beam zero-field optically pumped atomic magnetometer, in which a rotational high-frequency (ω1) and another high-frequency (ω2) modulated ...
Kun Wang, Kun Wang, Kaixuan Zhang, Binquan Zhou, Binquan Zhou, Fei Lu, Fei Lu, Shaowen Zhang, Shaowen Zhang, Yeguang Yan, Yeguang Yan, Weiyi Wang, Weiyi Wang, Jixi Lu, Jixi Lu   +14 more
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Software program development of a high-precision magnetometer system for human-occupied vehicles [PDF]

Geoscientific Instrumentation, Methods and Data Systems
Cesium optically pumped magnetometers are widely used in geophysical exploration, environmental monitoring, and scientific research for magnetic field measurements.
Q. Zhang, Q. Zhang, K. Zhou, M. Deng, L. Huang, C. Li, Q. Zhang   +6 more
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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, Yongbiao Yang, Ni Zhao, Jun He, Junmin Wang   +4 more
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Differential behavior of magnetic field and magnetic vector potential in an optically pumped Rb atomic magnetometer

AIP Advances, 2023
Although vector potentials are more intrinsic physical quantities than magnetic and electric fields, measuring them macroscopically is difficult. A double-nested Helmholtz-type vector potential coil, consisting of an elongated solenoid coil wound around ...
Y. Shoji, M. Daibo
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Polarization Measurement of Cs Using the Pump Laser Beam

IEEE Photonics Journal, 2017
In the optically pumped systems, the spin polarization of the atoms is generally derived by employing additional modulations, in which way an extra perturbation will be introduced and thus affect the normal operation of the sensors.
Rujie Li, Wei Quan, Jiancheng Fang
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Intra-cavity frequency doubling of an electrically pumped edge-emitting 980 nm laser diode with PPLN [PDF]

, 2009
The growing trend for laser-based projection displays makes intra-cavity frequency doubling (ICFD) of electrically and optically surface emitting diode lasers in the near IR region become more interesting [1-3].
Gawith, C.B.E., Li, Kang, Aiyun Yao, Yao, Aiyun, Knight, Ian G., C.B.E. Gawith, Copner, N.J., Kang Li, N.J. Copner, Ian G. Knight   +9 more
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Recent Developments in Fabrication Methods and Measurement Schemes for Optically Pumped Magnetic Gradiometers: A Comprehensive Review

Micromachines, 2023
Optically pumped gradiometers have long been utilized in measurement in the International Geomagnetic Reference Field (IGRF). With advancements in technologies such as laser diodes and microfabrication, integrated gradiometers with compact sizes have ...
Haifeng Dong, Hangfei Ye, Min Hu, Zongmin Ma   +3 more
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Electro-optically Q-switched Er:YAG laser in-band pumped by an Er,Yb fiber laser

, 2006
Electro-optically Q-switched operation of an Er:YAG laser at 1645nm end-pumped by a cladding-pumped Er-Yb fiber laser is reported.
Clarkson, W.A., Shen, D.Y., Sahu, Jayanta   +2 more
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Measuring the cortical tracking of speech with optically-pumped magnetometers

NeuroImage, 2021
During continuous speech listening, brain activity tracks speech rhythmicity at frequencies matching with the repetition rate of phrases (0.2–1.5 Hz), words (2–4 Hz) and syllables (4–8 Hz).
Paul de Lange, Elena Boto, Niall Holmes, Ryan M. Hill, Richard Bowtell, Vincent Wens, Xavier De Tiège, Matthew J. Brookes, Mathieu Bourguignon   +8 more
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