高灵敏度铷原子磁力仪研制

研制了一种新型的激光抽运高灵敏度原子磁力仪。该原子磁力仪利用磁场中铷原子与光场的相互作用,极化的铷原子在待测磁场中将进行拉莫尔进动,利用铷原子磁光共振频率与外磁场之间的关系,通过高灵敏度低噪声弱磁检测技术实现磁场的准确测量。测试结果表明,该磁力仪灵敏度为1pT/Hz~(1/2);测试过程中磁场波动范围优于0.4 nT。

Development on the Magnetometer with High Sensitivity Based on Rubidium Atoms

The detection of magnetic anomalies with intellectual property is very important,which works with al-kali metals pumped by the laser.A magnetometer based on nonlinear magneto -optical rotation has been con-structed and tested.In this magnetometer,the laser interacts with the rubidium atoms in the magnetic field,the Larmor precession causes a rotation of the polarization of a separate probe beam; the polarization rotation fre-quency provides a measure of the magnetic field.Test results show that its sensitivity reaches 1pT/Hz1/2, the fluctuateionof magnetic field is better than 0.4nT in the test course.