Results 41 to 50 of about 3,346 (191)
AIP Advances, 2020 The optical light shift effect is an all-optical technique to create magnetic bias fields to determine the vector components of the magnetic field using a scalar optically pumped magnetometer.
Janet W. Lou, Geoffrey A. Cranch
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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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VCSEL frequency stabilization for optically pumped magnetometers [PDF]
Chinese Optics Letters, 2021 Optically pumped magnetometers (OPMs) have developed rapidly in the bio-magnetic measurement field, which requires lasers with stable frequency and intensity for high sensitivity. Herein we stabilize a vertical-cavity surface-emitting laser (VCSEL) without any additional setup except for the parts of an OPM.
Yeguang Yan +5 more
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A sound card based multi-channel frequency measurement system [PDF]
, 2005 For physical processes which express themselves as a frequency, for example magnetic field measurements using optically-pumped alkali-vapor magnetometers, the precise extraction of the frequency from the noisy signal is a classical problem.
Bison, G. +3 more
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Software program development of a high-precision magnetometer system for human-occupied vehicles [PDF]
Geoscientific Instrumentation, Methods and Data SystemsCesium optically pumped magnetometers are widely used in geophysical exploration, environmental monitoring, and scientific research for magnetic field measurements.
Q. Zhang +6 more
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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 +14 more
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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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Frequency Response of Optically Pumped Magnetometer with Nonlinear Zeeman Effect
Applied Sciences, 2020 Optically pumped alkali atomic magnetometers based on measuring the Zeeman shifts of the atomic energy levels are widely used in many applications because of their low noise and cryogen-free operation.
Rui Zhang +4 more
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Non-invasive detection of animal nerve impulses with an atomic magnetometer operating near quantum limited sensitivity [PDF]
, 2016 Magnetic fields generated by human and animal organs, such as the heart, brain and nervous system carry information useful for biological and medical purposes.
Balabas, Mikhail V. +12 more
core +3 more sources