High-sensitivity all-optical cesium atom magnetometer

An atomic magnetometer and high-sensitivity technology, which is applied in the use of magneto-optical equipment for magnetic field measurement, the size/direction of the magnetic field, etc., can solve the problem of low sensitivity, achieve high sensitivity, improve sensitivity, and simple structure

Inactive Publication Date: 2014-02-05
NORTHEAST GASOLINEEUM UNIV
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AI Technical Summary

Problems solved by technology

[0012] After several years of development, the atomic magnetometer has made great progress abroad, and its sensitivity is low at room temperature

Method used

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  • High-sensitivity all-optical cesium atom magnetometer
  • High-sensitivity all-optical cesium atom magnetometer

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Embodiment Construction

[0025] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0026] Such as figure 1 As shown, a high-sensitivity all-optical cesium magnetometer has a magnetic shielding cylinder 1, a Cs atomic gas chamber 8 is placed in the magnetic shielding cylinder 1, and a three-axis Helmholtz coil 7 is placed around the Cs atomic gas chamber 8; The pumping light port 6, the detecting light port 2 and the exiting light port 9 are respectively provided on the shielding cylinder 1; the pumping light port 6 is correspondingly provided with a pumping light laser 4 and an electro-optic laser for square wave modulation of the amplitude of the pumping light. The modulator, the frequency of the pump light laser 4 is locked to the Cs atom D1 line F g =3→ F e= 4 resonance line; the detection light port is correspondingly equipped with a detection light laser 3, and the frequency of the detection light laser 3 is locked to the C...

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Abstract

The invention discloses a high-sensitivity all-optical cesium atom magnetometer and belongs to an atom magnetometer. The magnetometer is provided with a magnetic shielding tube, a Cs atom gas chamber is placed in the magnetic shielding tube, a three-axis Helmholtz coil is placed around the Cs atom air chamber, and a pump light opening, a detection light opening and am emergent light opening are respectively formed in the magnetic shielding tube. The Cs atom gas chamber is cuboid, four surfaces, used for passing through deflection light to form reflection, excepting incident light and emergent light local parts of the detection light, the Cs atom air chamber are plated with polarization-maintaining films, and the other two surfaces used for passing through pump light are not plated with films. The detection light emitted by a detection light laser enters the Cs atom gas chamber through a polarizing film and a small aperture diaphragm and is emergent after reflected on all the surfaces of the gas chamber repeatedly, the polarization plane of the emergent light rotates by a one-degree angle, one drip of Cs, 100Torr of He gas and 20Torr of N2 gas are put into the Cs atom gas chamber, and the Cs atom gas chamber works at normal temperature. The high-sensitivity all-optical cesium atom magnetometer has the advantages of being simple in structure and still capable of keeping high sensitivity without being heated.

Description

technical field [0001] The invention belongs to an atomic magnetometer, in particular to a high-sensitivity all-optical cesium atomic magnetometer. Background technique [0002] The basic principle of the atomic magnetometer is to use a beam of light to polarize alkali metal atoms, and use another beam of light to detect the component of the spin of the polarized atom in the direction of the detection light, so as to realize the detection of an extremely weak magnetic field. This technology covers the interaction between lasers and atoms, the transmission of light in anisotropic media, laser spectroscopy and other directions. It is an optical measurement method for weak magnetic fields. As one of the top ten emerging technologies that will have a major impact on our lives and society in the next few years, it has important research value. [0003] The field of application of weak magnetic detection technology is very wide, mainly including geological survey, oil and gas and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R33/032
Inventor 刘强孙伟民张军海孙宇丹付天舒刘东明
Owner NORTHEAST GASOLINEEUM UNIV
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