Magnetocardiography Measurements by Microfabricated Atomic Magnetometer With a 3-D Spherical Alkali Vapor Cell

Zhang, Jin; Liu, Kangni; Zhang, Jianfeng; Wang, Ziji; Shang, Jintang

doi:10.1109/tim.2021.3120375

Cited by 14 publications

(7 citation statements)

References 41 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Although we saw in section 3 that reducing the number of atoms worsens the sensitivity of a magnetometer, there may be strong motivations for miniaturization-including reduced standoff distance and improved spatial resolution, or integration of the cell into small quantum systems [23,96,111,[113][114][115][149][150][151] with low size, weight, and power (SWaP). Production of MEMS ('micro-electromechanical systems') vapor cells for magnetometers and atomic clocks is a rapidly growing field, typically incorporating anodic-bonding techniques [152][153][154].…”

Section: Need a Microfabricated Vapor Cell-what Are My Options?mentioning

confidence: 99%

How to build a magnetometer with thermal atomic vapor: a tutorial

2023

View full text Add to dashboard Cite

This article is designed as a step-by-step guide to optically pumped magnetometers based on alkali atomic vapor cells. We begin with a general introduction to atomic magneto-optical response, as well as expected magnetometer performance merits and how they are affected by main sources of noise. This is followed by a brief comparison of different magnetometer realizations and an overview of current research, with the aim of helping readers to identify the most suitable magnetometer type for specific applications. Next, we discuss some practical considerations for experimental implementations, using the case of an M z magnetometer as an example of the design process. Finally, an interactive workbook with real magnetometer data is provided to illustrate magnetometer-performance analysis.

show abstract

Section: Need a Microfabricated Vapor Cell-what Are My Options?mentioning

confidence: 99%

How to build a magnetometer with thermal atomic vapor: a tutorial

2023

View full text Add to dashboard Cite

show abstract

“…For example, Fig. 3 (original figures available in [86] [87]) shows the typical size of an OPM and SURF. Most of AMs are just couple centimeters in their largest dimension [75] [37] [67] [34].…”

Section: B Atomic Magnetometers (Am)mentioning

confidence: 99%

A Review of Magnetic Field Emissions From the Human Body: Sources, Sensors, and Uses

Zhu

Kiourti

2022

IEEE Open J. Antennas Propag.

View full text Add to dashboard Cite

It has long been common practice to capture the electric fields emanated by the human body as a means of detecting and/or monitoring diverse health conditions. However, these electric fields are strongly impacted by the complex permittivity of biological tissues which deteriorates their waveforms and limits their diagnostic capabilities. As an alternative, recent progress has been made in the measurement of bio-magnetic fields occur from the natural currents flowing through the body. The advantage in this case is, since tissues are non-magnetic, magnetic fields propagate in an uninterrupted manner towards the skin surface where they are eventually collected. This unveils game-changing opportunities for future medical diagnostics. Nevertheless, a major challenge associated with sensing these naturally emanated magnetic fields is that they are extremely weak, and in fact orders of magnitude smaller than those generated by the Earth. To this end, extensive efforts have been pursued to realize sensing technology that is sensitive enough to collect biomagnetic fields. Example fields of use include magnetomyography (MMG), magnetocardiography (MCG), magnetoencephalography (MEG), and Magnetoneurography (MNG) (including magnetospinography (MSG)). This review will provide an overview of technologies used to sense bio-magnetic fields, list their merits and limits in a critical manner, and discuss clinical applications.INDEX TERMS Bioelectromagnetics, magnetocardiography (MCG), magnetoencephalography (MEG), magnetomyography (MMG), Magnetoneurography (MNG), magnetospinography (MSG).

show abstract

“…In 2021, Jin Zhang et al designed the SERF atomic magnetometer with a spherical gas chamber for cardio magnetography measurements. Under magnetically shielded conditions, the magnetometer sensitivity reached 125

at 15 Hz and was able to obtain morphologically clear cardio magnetic signals [ 133 ]. The main competitor of VCSELs in the application of bio-sensing is the DFB laser, which has the advantages of high power, narrow line-width, low noise, and high stability.…”

Section: Atomic Magnetometer In the Medical Fieldmentioning

confidence: 99%

Application of VCSEL in Bio-Sensing Atomic Magnetometers

et al. 2022

View full text Add to dashboard Cite

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.

show abstract

Magnetocardiography Measurements by Microfabricated Atomic Magnetometer With a 3-D Spherical Alkali Vapor Cell

Cited by 14 publications

References 41 publications

How to build a magnetometer with thermal atomic vapor: a tutorial

How to build a magnetometer with thermal atomic vapor: a tutorial

A Review of Magnetic Field Emissions From the Human Body: Sources, Sensors, and Uses

Application of VCSEL in Bio-Sensing Atomic Magnetometers

Contact Info

Product

Resources

About