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High-spatial-resolution vector magnetic field measuring device based on potassium-rubidium mixed pumping

A high spatial resolution, vector magnetic field technology, applied in the field of high spatial resolution vector magnetic field measurement devices, can solve the problems of low spatial resolution, difficult to achieve high spatial resolution, and difficult to achieve spatial resolution, and achieve high spatial resolution. , the effect of low spatial resolution and high cost

Active Publication Date: 2020-04-21
BEIHANG UNIV
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Problems solved by technology

Using the method of magnetometer probe array to realize the head magnetic field reconstruction, affected by the size of the probe, the spatial resolution is low
Using an atmospheric chamber combined with an array detector for three-dimensional magnetic field gradient measurement, the spatial resolution is difficult to reach the μm level, and the spatial resolution and sensitivity are mutually restricted.
Current existing methods are difficult to achieve high spatial resolution and high sensitivity vector magnetic field measurement at the same time

Method used

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  • High-spatial-resolution vector magnetic field measuring device based on potassium-rubidium mixed pumping
  • High-spatial-resolution vector magnetic field measuring device based on potassium-rubidium mixed pumping
  • High-spatial-resolution vector magnetic field measuring device based on potassium-rubidium mixed pumping

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Embodiment Construction

[0021] Below with the accompanying drawings ( Figure 1-Figure 2 ) to illustrate the present invention.

[0022] figure 1 It is a structural schematic diagram of a high spatial resolution vector magnetic field measurement device based on mixed pumping of potassium and rubidium for implementing the present invention. figure 2 yes figure 1 Schematic diagram of digital micromirror device scanning with spatial light modulator. Such as Figure 1 to Figure 2As shown, a high spatial resolution vector magnetic field measurement device based on potassium-rubidium mixed pumping includes an atomic gas chamber 18 containing potassium atoms and rubidium atoms, and a circular polarization pumping device is arranged along the Z-axis direction of the atomic gas chamber 18. The pumping beam irradiates the channel, and the circularly polarized pumping beam is used to polarize the potassium atoms in the atomic gas chamber 18, and a linearly polarized detection beam irradiating channel is ar...

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Abstract

A high-spatial-resolution vector magnetic field measuring device based on potassium-rubidium mixed pumping provides dual irradiation of a circular polarization pumping light beam and a linear polarization detection light beam for an atom air chamber containing potassium atoms and rubidium atoms, and is beneficial for obtaining polarizability more uniform than that of a single alkali metal atom airchamber. In addition, a detection magnetic field can be obtained through an atomic spin precession signal, atomic spin signals are obtained through a photoelastic modulator, spatial light high-frequency scanning is performed on a detection light field through a spatial light modulator digital micromirror device, magnetic field parameter modulation is performed through a three-axis magnetic compensation coil to carry out vector magnetic field detection, and high-spatial-resolution vector magnetic field measurement is achieved.

Description

technical field [0001] The invention relates to atomic magnetometer technology, in particular to a high spatial resolution vector magnetic field measuring device based on potassium-rubidium mixed pumping, which provides circularly polarized pumping beams and linearly polarized pumping beams to atomic gas chambers containing potassium atoms and rubidium atoms The double irradiation of the detection beam is beneficial to obtain a more uniform polarizability than that of a single alkali metal atom gas cell. The invention can also obtain the detection magnetic field through the atomic spin precession signal, use the photoelastic modulator to obtain the atomic spin signal, use the digital micromirror device of the spatial light modulator to scan the detection light field with high-frequency spatial light, and use the three-axis The magnetic compensation coil performs magnetic field parameter modulation to detect vector magnetic field, so as to realize vector magnetic field measurem...

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Application Information

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IPC IPC(8): G01R33/032
CPCG01R33/032
Inventor 房建成房秀杰翟跃阳魏凯赵天马丹跃邢博铮肖志松
Owner BEIHANG UNIV
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