一种磁场测量方法及原子磁力仪系统

本发明提供一种磁场测量方法及原子磁力仪系统，其中方法包括：控制光强调制器对激光进行周期性调制，得到泵浦光以及探测光，其中泵浦光的光强大于探测光的光强；控制光强调制器对所述泵浦光进行调制，得到带调制信号的调制泵浦光；控制信号探测器接收由探测光经过极化态原子的拉莫尔进动作用后得到的变化探测光，获取变化探测光的偏振旋转角度信号，其中所述极化态原子由所述调制泵浦光作用在原子探头上产生，极化态原子的拉莫尔进动在待测磁场下产生；对偏振旋转角信号进行解调，并根据所述调制信号的频率计算获取待测磁场的值。本发明解决了现有技术中的原子磁力仪的灵敏度不高的问题。

The invention provides a magnetic field measurement method and an atomic magnetometer system. The method comprises the steps that: a light intensity modulator is controlled to carry out periodic modulation on laser, so as to obtain pump light and detection light, the light intensity of the pump light is greater than the light intensity of the detection light; the light intensity modulator is controlled to modulate the pump light to obtain modulated pump light with a modulation signal; a signal detector is controlled to receive changed detection light obtained after the detection light passes through Larmor procession of a polarization state atom, and obtains a polarization rotation angle signal of the changed detection light, the polarization state atom is generated by the modulated pump light acting on an atom probe, and Larmor procession of the polarization state atom is generated under a magnetic field to be detected; and the polarization rotation angle signal is demodulated, and the value of the magnetic field to be detected is calculated according to the frequency of the modulation signal. With the magnetic field measurement method and the atomic magnetometer system adopted, the problem of low sensitivity of an atomic magnetometer in the prior art is solved.