摘要
本文介绍了SERF(无自旋交换弛豫)态原子磁强计基本原理和检测方法,阐述了双光束交叉调制法和单光束分频调制法,这两种现有的地磁场下SERF态原子磁强计获得三轴磁场信息的检测方法.对两种方法在光路配置、零位偏置和灵敏度等方面的特性进行了比较,总结了双光束交叉调制法在y轴锁零控制方面存在的难度,得出了单光束分频调制的z轴方向灵敏度会随磁场减小而下降,同样导致锁零精度下降的结论.
The basic theory and testing methods of SERF magnetometer are introduced. After describing two unshielded SERF magnetometer schemes, i.e. the dual-beam cross modulation scheme and the single - beam frequency division modulation scheme, the comparisons on optical path configuration, zero-bit offset and sensitivity are performed. Conclusively, the zero lock of dual-beam scheme in y axis is difficult and the sensitivity of single-beam scheme will decrease while the magnetic field decays, leading to the same problem that the zero lock precision declines.
出处
《测试技术学报》
2012年第6期468-474,共7页
Journal of Test and Measurement Technology
基金
国家自然科学基金(61074171
61273067
61121003)
北京市自然科学基金(3122025)
国家重大科学研究计划(2012CB934104)资助项目
关键词
原子
SERF态
磁强计
双光束交叉调制
单光束分频调制
atom
spin-exchange-relaxation-free (SERF)
magnetometer
dual-beam cross modulation
sin-gle-beam frequency division modulation