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Dynamic mode conversion atomic magnetic field detection device

A dynamic mode, magnetic field measurement technology, applied in the use of magneto-optical equipment for magnetic field measurement, magnetic field size/direction and other directions, can solve problems such as strong anti-interference ability

Inactive Publication Date: 2021-11-09
NAT INNOVATION INST OF DEFENSE TECH PLA ACAD OF MILITARY SCI
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Problems solved by technology

Compared with the vector atomic magnetometer, although the scalar atomic magnetometer obtains less magnetic field information, it generally has higher sensitivity and strong anti-interference ability

Method used

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  • Dynamic mode conversion atomic magnetic field detection device
  • Dynamic mode conversion atomic magnetic field detection device

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Embodiment

[0020] Reference attached figure 1 , the present invention discloses a dynamic mode conversion atomic magnetic field measurement device, including a pump beam generating component, a probe beam generating component, a liquid crystal variable wave plate 108, an atomic gas chamber 301, an auxiliary magnetic field generating component, and a probe beam inspection component; The pump beam generation component is used to generate pump laser light, and the pump laser light is used to polarize the alkali metal atomic medium in the atomic gas chamber; the detection beam generation component is used to generate detection laser light, and the detection laser light passes through the atomic gas chamber The alkali metal atomic medium realizes magnetic field signal detection; the liquid crystal variable wave plate is set on the optical path of the pump laser, and the liquid crystal variable wave plate is set between the pump beam generating component and the atomic gas chamber for dynamic s...

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Abstract

The invention provides a dynamic mode conversion atomic magnetic field measuring device, which regulates and controls the polarization state of pump light in an atomic magnetometer by using a liquid crystal variable wave plate, and is mainly characterized by (1) pumping alkali metal atoms by using circular polarization laser, so that the atoms spin to generate vector polarization along the light transmission direction, and high-sensitivity scalar magnetic field measurement is realized; and (2) pumping alkali metal atoms by using linear polarization laser to enable the atoms to spin to generate tensor polarization along the light polarization direction, and simultaneously measuring the amplitude and the direction of the magnetic field component. According to the invention, on the premise that a laser light source and a detector are not added, the dynamic switching of atom magnetic detection modes is realized, and the anti-interference capability and the sensitivity of magnetic field measurement are effectively improved while the vector measurement function of the system is ensured. The device is simple in structure, convenient to operate, capable of being used for different types of atomic gas chambers, high in transportability and practical.

Description

technical field [0001] The invention belongs to a magnetic field measurement device, in particular to a dynamic mode conversion atomic magnetic field detection device. Background technique [0002] The atomic magnetometer is the magnetic field measurement instrument with the highest detection sensitivity that has been verified so far. According to the ability to measure the magnetic field, atomic magnetometers can be divided into scalar atomic magnetometers and vector atomic magnetometers. The scalar atomic magnetometer, also known as the total field atomic magnetometer, can measure the strength of the magnetic field and can be used in magnetic resonance, magnetic brain imaging, constant measurement and other fields; the vector atomic magnetometer can measure the strength and direction of the magnetic field and can be used for geomagnetic matching Navigation, target detection, electric dipole moment research and other fields. Compared with the vector atom magnetometer, alt...

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Application Information

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IPC IPC(8): G01R33/032
CPCG01R33/032
Inventor 李莹颖马明祥徐馥芳谢玉波张锐汪杰罗玉昆
Owner NAT INNOVATION INST OF DEFENSE TECH PLA ACAD OF MILITARY SCI
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