Atomic magnetometer probe based on optical virtual magnetic field technology

Abstract

The invention discloses an atomic magnetometer probe based on an optical virtual magnetic field technology, which relates to the technical field of atomic magnetometers, and aims to solve the problemsthat the existing atomic magnetometer is low in signal-to-noise ratio and cannot perform high-sensitivity measurement on a magnetic field. The atomic magnetometer probe comprises a laser, a 1 / 2 waveplate, a polarization beam splitter prism, a 1 / 4 wave plate, an atomic gas chamber, a photoelectric detector, a semi-transparent and semi-reflective mirror, a frequency discrimination module and a PIDfeedback circuit. The atomic magnetometer probe utilizes laser to control atoms to extract magnetic field information sensed by the atoms, namely, utilizes the relationship between the spin of unpaired electrons or helium atom electrons on the outer layer of gaseous alkali metal cesium atoms and a magnetic field, controls the electron energy level transition in the atoms through an optical method, and realizes the frequency measurement of atomic Larmor precession, and thus, high-sensitivity measurement of the atomic magnetometer on the magnetic field is realized. The atomic magnetometer probeis suitable for the detection field.

Description

technical field

[0001] The invention belongs to the technical field of atomic magnetometer, in particular to a magnetometer probe. Background technique

[0002] With the development of submarine stealth technology, new challenges are posed to the current magnetic anomaly anti-submarine technology. The detection sensitivity of the existing magnetometer can no longer meet the requirements in future anti-submarine warfare. As an effective non-acoustic detection method, Magnetic Anomaly Detection (MAD) technology is widely used in aviation submarine detection and anti-submarine technology. Since the relationship between the magnetic induction signal and the distance is inversely proportional to the third power, that is to say, to double the detection range, the sensitivity of the atomic magnetometer should be increased by nearly one order of magnitude. Therefore, the detection distance of the magnetic anomaly detection system mainly depends on the performance improvement of the...

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