A new all-optical laser optically pumped magnetometer and its realization method

Abstract

The invention discloses a novel all-optical type laser light pump magnetometer and a realization method thereof. The method comprises the following steps: putting a weak-magnetic-field probe into a magnetic field to be detected at a constant temperature; regulating two laser device control circuits respectively to ensure that two laser frequencies are subjected to energy level transition resonance with a D1 line and a D2 line of alkali metal atoms; regulating angles of a half-wave plate optical axis, a quarter-wave plate optical axis and respective laser polarization to ensure that two beams of laser form round polarization with the polarization phase difference of 180 degrees; regulating two laser devices, a half-wave plate, a polarization beam splitting prism and a quarter-wave plate to ensure that the two beams of laser are completely overlapped on the weak-magnetic-field probe; detecting the laser frequency and laser subjected to the energy level transition resonance with the D1 line of the alkali metal atoms by a photoelectric converting device; and acquiring and carrying out signal processing on a detected light intensity value through data acquisition and processing equipment to obtain magnetic induction intensity B of a magnetic field to be detected. The novel all-optical type laser light pump magnetometer has the advantages of simplicity in operation and no electromagnetic interferences and can realize all-optical property of the weak-magnetic-field probe.

Description

technical field [0001] The invention belongs to the technical field of weak magnetic field measurement, and relates to a new all-optical laser optical pump magnetometer and its implementation method, which are used to eliminate external electromagnetic interference of the optical pump magnetometer and solve the problem that the weak magnetic field probes in the traditional optical pump magnetometer cannot be densely distributed. array and use in high-voltage, irradiated environments. Background technique [0002] In modern technology, the detection of weak magnetic fields is a very important technology. At present, the atomic magnetometer is one of the main weak magnetic field detection instruments. The optical pump magnetometer scheme is the most sensitive and practical among the atomic magnetometers, and it is also one of several high-precision atomic magnetometer schemes for commercialization. However, since the traditional optically pumped magnetometer needs to add a ra...

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Problems solved by technology

[0003] An object of the present invention is to provide a new all-optical laser optical pump magnetometer in order to overcome many problems caused by the radio frequency coil of the traditional optical pump magnetometer

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