Simultaneously improving the sensitivity and absolute accuracy of CPT magnetometer

Liang, Shangqing; Yang, Guang‐Fu; Xu, Yuanxin; Lin, Qiang; Liu, Zhiheng; Chen, Zhengxiang

doi:10.1364/oe.22.006837

Cited by 21 publications

(10 citation statements)

References 13 publications

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“…Frequency injection locking is achieved by feeding output of the master circuit back to the slave circuit. In 2014, Shangqing Liang et al proposed a new differential detection method for CPT magnetometers, which is able to improve both sensitivity and absolute accuracy [ 102 ]. The experimental setup is shown in Figure 11 a.…”

Section: Application Of Vcsel In a Chip-scale Atomic Magnetometermentioning

confidence: 99%

Application of VCSEL in Bio-Sensing Atomic Magnetometers

et al. 2022

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Recent years have seen rapid development of chip-scale atomic devices due to their great potential in the field of biomedical imaging, namely chip-scale atomic magnetometers that enable high resolution magnetocardiography (MCG) and magnetoencephalography (MEG). For atomic devices of this kind, vertical cavity surface emitting lasers (VCSELs) have become the most crucial components as integrated pumping sources, which are attracting growing interest. In this paper, the application of VCSELs in chip-scale atomic devices are reviewed, where VCSELs are integrated in various atomic bio-sensing devices with different operating environments. Secondly, the mode and polarization control of VCSELs in the specific applications are reviewed with their pros and cons discussed. In addition, various packaging of VCSEL based on different atomic devices in pursuit of miniaturization and precision measurement are reviewed and discussed. Finally, the VCSEL-based chip-scale atomic magnetometers utilized for cardiac and brain magnetometry are reviewed in detail. Nowadays, biosensors with chip integration, low power consumption, and high sensitivity are undergoing rapid industrialization, due to the growing market of medical instrumentation and portable health monitoring. It is promising that VCSEL-integrated chip-scale atomic biosensors as featured applications of this kind may experience extensive development in the near future.

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Section: Application Of Vcsel In a Chip-scale Atomic Magnetometermentioning

confidence: 99%

Application of VCSEL in Bio-Sensing Atomic Magnetometers

et al. 2022

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Section: Optically Pumped Atomic Magnetometersmentioning

confidence: 99%

“…The operating mechanisms of such sensors are (i) coherent population trapping [125], (ii) non-linear magneto-optical rotation [126], and (iii) spin-exchange relaxation-free [34] regimes. Magnetometers based on (i) and (ii) can reach detection limits of 0.1-1 pT/√Hz [127,128] without requiring magnetic shielding while magnetic sensors based on (iii) provide a detection level of the order of 10 fT/√Hz, but in most cases, they need to be placed in a magnetically shielded room [129][130][131]. The fact, that these magnetometers do not require strong cooling systems such as SQUIDs and are easy to miniaturize which make them very promising in the field of biomagnetic sensing [132][133][134].…”

Section: Optically Pumped Atomic Magnetometersmentioning

confidence: 99%

Ultrasensitive Magnetic Field Sensors for Biomedical Applications

Murzin

Mapps

Levada

et al. 2020

Sensors

158

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The development of magnetic field sensors for biomedical applications primarily focuses on equivalent magnetic noise reduction or overall design improvement in order to make them smaller and cheaper while keeping the required values of a limit of detection. One of the cutting-edge topics today is the use of magnetic field sensors for applications such as magnetocardiography, magnetotomography, magnetomyography, magnetoneurography, or their application in point-of-care devices. This introductory review focuses on modern magnetic field sensors suitable for biomedicine applications from a physical point of view and provides an overview of recent studies in this field. Types of magnetic field sensors include direct current superconducting quantum interference devices, search coil, fluxgate, magnetoelectric, giant magneto-impedance, anisotropic/giant/tunneling magnetoresistance, optically pumped, cavity optomechanical, Hall effect, magnetoelastic, spin wave interferometry, and those based on the behavior of nitrogen-vacancy centers in the atomic lattice of diamond.

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“…The zero-order component of the alignment polarization A 0 y has the similar formula described as the P 0 z . ν and μ can also be described by equation (4). But in the alignment polarization, the magnetic resonance occurs at ω = 2ω L .…”

Section: Theoretical Modelmentioning

confidence: 99%

“…Optically pumped atomic magnetometer has been actively developed in recent years [1]- [4], which is widely used in many applications, such as biomagnetism [5], [6], low-field magnetic resonance [7], [8], searching for dark matter [9] and probing fundamental symmetries [10]. All these applications usually need to be operated under the clean magnetic environment, which can be achieved by a multilayer magnetic shield and a triaxial magnetic coil.…”

Section: Introductionmentioning

confidence: 99%

In Situ Calibration of Magnetic Coil System Using Ellipticity-Induced Bell-Bloom Magnetometer

2019

Self Cite

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The three-axis coil system is most commonly used in magnetic field measurement. The coil constant is an important parameter. We demonstrate a method to measure the coil constant based on the Larmor frequency. An elliptically polarized light is used to simultaneously excite the spin orientation and spin alignment via synchronous optical pumping. And then the coil system can be calibrated by measuring the magnetic resonance frequency of Bell-Bloom magnetometer. The advantage of this method is that the coil constants of all three directions can be obtained without any active adjustments. It is important for some applications, such as measuring the biological magnetic field with the integrated magnetometer. The method for calibration of a three-axis coil system is experimentally exploited. The experimental results show that the calibration accuracy of pT level can be achieved.

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Simultaneously improving the sensitivity and absolute accuracy of CPT magnetometer

Cited by 21 publications

References 13 publications

Application of VCSEL in Bio-Sensing Atomic Magnetometers

Application of VCSEL in Bio-Sensing Atomic Magnetometers

Ultrasensitive Magnetic Field Sensors for Biomedical Applications

In Situ Calibration of Magnetic Coil System Using Ellipticity-Induced Bell-Bloom Magnetometer

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