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Self-excited laser light pump magnetometer system based on double absorption chamber

An optical pump magnetometer, self-excited technology, applied in the use of magneto-optical equipment for magnetic field measurement, the size/direction of the magnetic field, etc., can solve the problems of the magnetic field value steering difference, the direction of the magnetic field to be measured is unknown, etc.

Inactive Publication Date: 2019-05-17
CSIC NO 710 RES & DEV INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in practical applications, since the direction of the magnetic field to be measured is unknown, when the relative direction of the magnetic field and the optical pump magnetometer changes, the measured magnetic field value will have a steering difference

Method used

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  • Self-excited laser light pump magnetometer system based on double absorption chamber
  • Self-excited laser light pump magnetometer system based on double absorption chamber

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Embodiment 2

[0036] Based on the above embodiments, this embodiment provides another self-excited laser optically pumped magnetometer system. see figure 2 , which is a structural principle diagram of a self-excited laser optically pumped magnetometer system based on double absorption chambers provided in this embodiment. Specifically, the self-excited laser optical pump magnetometer system of this embodiment also includes a first condenser lens 11, a second condenser lens 18, a first transimpedance amplifier 13 and a second transimpedance amplifier 20, and the circle Polarization module 22 includes semiconductor laser 1, beam expander 2, half mirror 3, first reflector 4, second reflector 5, third reflector 6, first polarizer 7, first 1 / 4 Wave plate 8, second polarizer 14 and second 1 / 4 wave plate 15;

[0037] After the laser beam emitted by the semiconductor laser 1 is expanded by the beam expander 2, it is divided into two sub-lasers perpendicular to each other through the half-mirror ...

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Abstract

The invention provides a self-excited laser light pump magnetometer system based on a double absorption chamber. By mutually canceling out phase shift by two symmetric atomic absorption chambers in aself-excited laser light pump magnetometer, the self-excited laser light pump magnetometer system can satisfy a phase condition of theta=0 degree in the absence of + / - 90 degree phase-shifting circuit, thus a circuit structure of a whole self-excited light pump magnetometer system is greatly simplified, a resonance spectrum of the self-excited light pump magnetometer system is more symmetrical, and thus steering difference caused by asymmetry of an atomic energy level resonance spectrum can be greatly reduced.

Description

technical field [0001] The invention belongs to the technical field of magnetic field measurement, in particular to a self-excited laser optical pump magnetometer system based on double absorption chambers. Background technique [0002] The energy levels of alkali metal or helium atoms produce Zeeman splitting in a weak magnetic field, and the size of the energy level splitting is proportional to the size of the magnetic field. Under thermal equilibrium conditions, each Zeeman sub-level follows the Boltzmann distribution, and each energy level is nearly uniformly distributed. Under the action of optical pumping, light in a specific polarization state is absorbed by alkali metal atoms or helium atoms. The absorption of light by alkali metal atoms or helium atoms is constrained by the selection rule while satisfying energy conservation. Under the action of pumping, it is broken to produce a certain spin orientation, forming a macroscopic magnetic moment in the direction of li...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R33/032
Inventor 石铭王羚张樊顾清郭立新
Owner CSIC NO 710 RES & DEV INST