三轴矢量SERF原子磁力仪高频过零磁场调制
Zero-crossing magnetic field modulation at high frequency for triaxial-vectorial SERF atomic magnetometer
摘要：
基于布洛赫方程准稳态解的三轴矢量磁场测量方法是由S。Seltzer和M. Romalis于2004年提出，其引入了双轴过零磁场调制。调制频率必须足够慢才能保证准稳态解的有效性，否则测量精度将严重下降。因此，系统的带宽受到很大限制。为了提高带宽的调制频率范围的限制，我们研究了碱金属原子的自旋响应的高频调制场通过求解布洛赫方程的时间依赖的方式。
英文摘要：
The triaxial-vectorial magnetic field measurement method based on the quasi-steady-state solution of Bloch equation for SERF atomic magnetometry is firstly proposed by S. Seltzer and M. Romalis in 2004, which introduces dual-axis zero-crossing magnetic fields modulation. The modulation frequency must be slow enough that the quasi-steady-state solution is valid, otherwise the measurement accuracy will be seriously degraded. Thus the bandwidth of the system is greatly limited. In order to enhance the bandwidth constricted by the range of modulation frequency, we investigate the response of alkali-atomic spin to high-frequency modulation field by solving the Bloch equation in a time-dependence manner.
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