公开(公告)号：US11867778B2

公开(公告)日：2024-01-09

申请号：US17889802

申请日：2022-08-17

Applicant: ZHEJIANG LAB

Inventor： Qiang Guo ,  Ning Zhang ,  Ziwen Li ,  Zixuan Wang ,  Mengshi Zhang ,  Tingting Yu

IPC: G01R33/032

CPC classification number: G01R33/032

Abstract: The present disclosure discloses a system and method for testing the spatial distribution uniformity of an alkali metal atom number density of an atom magnetometer. The system includes a detection laser, a laser beam expanding system, a polarizing element, a magnetic shielding system, an alkali metal atom gas chamber, a beam profile camera, a beam splitting prism, etc., which are sequentially arranged in a light advancing direction. In the method, based on an optical absorption principle, light intensity attenuations of linearly polarized light before and after passing through the alkali metal gas chamber are tested by using the beam profile camera with pixels in the level of um, a two-dimensional distribution matrix of an atom number density in space is calculated, and the distribution uniformity of the atom number density is analyzed by using a discrete coefficient.