System and method for automatically detecting transverse relaxation time of atoms

Abstract

The invention discloses a system and a method for automatically detecting the transverse relaxation time of atoms. The system comprises a laser generating module, a polarization modulating module, a signal detection module, an atomic gas chamber and a host computer. The method comprises the following steps: the laser generating module provides laser with a stable frequency, the polarization modulating module adjusts the polarization state of the laser, different polarization states respectively act as a pumping light and a detecting light, the pumping light polarizes atoms, the detecting lightgoes through the polarized atomic gas chamber to change the optical power of the detecting light, the interval time of the pumping light and the detecting light is adjusted by a host computer, the transmitted light power value of the detecting light is measured multiple times, and fitting is carried out according to an e exponential curve in order to obtain the transverse relaxation time of the atoms. The method for detecting the transverse relaxation time has the advantages of realization of the testing of the transverse relaxation time of the atoms in a single optical path, simple and reliable optical path, and improvement of the measuring accuracy and the working efficiency.

Description

technical field [0001] The invention relates to an automatic detection system and method for atomic transverse relaxation time, belonging to the field of quantum precision measurement. Background technique [0002] The atomic energy level has the characteristics of quantization, high stability, and uniqueness. Therefore, atoms are mostly used to develop high-precision instruments such as atomic magnetometers, atomic gyroscopes, and atomic clocks. The working mechanisms of these instruments are based on atomic polarization. The collision between atoms and the collision between atoms and the wall of the device will lead to the transverse relaxation of atoms, which is manifested as the polarization intensity of atoms decreases with time, and the decay time constant is the transverse relaxation time. The transverse relaxation time of atoms is a key parameter affecting the accuracy of instruments such as atomic magnetometers, so increasing the transverse relaxation time of atoms ...

AI Technical Summary

Problems solved by technology

At present, the detection methods for the relaxation time of atoms need to provide two laser beams, one beam of pump light is used to polarize the atoms, and the other beam of probe light is used to detect the polarization intensity of atoms. The optical path is complex and vulnerable to environmental conditions. influences

In addition, the pulse width of the detection light in the traditional method is long, and the influence of the relaxation of atoms caused by the detection light is not considered

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