Integrated measurement device for atomic density and polarizability of alkali metal vapor

Abstract

The invention discloses an integrated measurement device for atomic density and polarizability of alkali metal vapor. The device comprises a drive laser subsystem, a measuring and sensing unit subsystem and a detection unit subsystem, wherein the measuring and sensing unit subsystem has the function of providing a physical carrier and testing conditions for measurement of density and polarizability; the drive laser subsystem has the function of polarizing alkali metal atoms in an air chamber; and the detection unit subsystem has the functions of measuring a deflection angle of detection light under different testing conditions and calculating the deflection angle to obtain the atomic density and polarizability. According to the device, pumping light is generated to irradiate the air chamber by utilizing the drive laser subsystem, a fixed magnetic field is applied to generate a Faraday rotating angle in the measuring and sensing unit subsystem, the deflection angle of the detection light is measured by utilizing the detection unit subsystem, and finally the atomic density and polarizability are calculated through a data processor. The device has the characteristics of simple measurement system and high measurement accuracy and has important significance for improving the inertia of atoms and the magnetic field measurement sensitivity.

Description

technical field [0001] The invention relates to the technical field of ultra-high sensitive atomic spin inertial measurement, in particular to a device for measuring the atomic density and polarizability of alkali metal vapor, which can be used to study the manipulation of atomic spin in a relaxation state without spin exchange. Background technique [0002] The measurement of the polarizability of alkali metal atoms plays an important role in studying the behavior of atomic spins in the spin-exchange-free relaxation state. Today's ultra-high-precision inertial navigation and guidance urgently need ultra-high-sensitivity inertial measurement, and the accuracy of inertial measurement is the core that determines the accuracy of navigation and guidance. The stability of atomic spin polarizability directly affects the stability of the scale factor of ultra-sensitive atomic spin inertial measurement, which is particularly important for the measurement of atomic spin polarizabilit...

AI Technical Summary

Problems solved by technology

Both the atomic density of alkali metal vapor and the polarizability of alkali metal atoms play an important role in the study of atomic spins in the relaxation state without spin exchange. At present, these two physical quantities need to be measured separately by two different sets of devices, and the traditional measurement The equipment and experimental conditions of the alkali metal vapor atomic density and alkali metal atomic polarizability device are relatively complicated.

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