一种磁场梯度测量方法以及原子磁力梯度仪系统

本发明公开了一种磁场梯度测量方法以及原子磁力梯度仪系统，包括控制光调制器对激光进行处理，得到泵浦光以及探测光；控制光调制器对泵浦光进行周期性调制，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依次经过第一极化态原子的拉莫尔进动作用、第二极化态原子的拉莫尔进动作用后得到的第二变化探测光，获取第二变化探测光的偏振旋转角度信号；对第一变化探测光的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第一待测外磁场的值，可同时获得第一极化态原子处的磁场强度。本发明实现了一种灵敏紧凑的磁场强度和磁场梯度的同时测量方法，并且能够抑制磁场梯度测量中的共模噪声，提升磁场梯度测量的灵敏度和精度。;本发明公开了一种磁场梯度测量方法以及原子磁力梯度仪系统，包括控制光调制器对激光进行处理，得到泵浦光以及探测光；控制光调制器对泵浦光进行周期性调制，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依次经过第一极化态原子的拉莫尔进动作用、第二极化态原子的拉莫尔进动作用后得到的第二变化探测光，获取第二变化探测光的偏振旋转角度信号；对第一变化探测光的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第一待测外磁场的值，可同时获得第一极化态原子处的磁场强度。本发明实现了一种灵敏紧凑的磁场强度和磁场梯度的同时测量方法，并且能够抑制磁场梯度测量中的共模噪声，提升磁场梯度测量的灵敏度和精度。

The invention discloses a magnetic field gradient measurement method and an atomic magnetic gradiometer system. The method comprises the steps of controlling a light modulator to process laser, and obtaining pump light and probe light, controlling a light modulator to periodically modulate the pump light to obtain modulated pump light with a modulation signal, controlling the signal detector to receive second change detection light obtained after the detection light sequentially passes through the Larmor advance action of the first polarization state atom and the Larmor advance action of the second polarization state atom, and acquiring a polarization rotation angle signal of the second change detection light, demodulating a polarization rotation angle signal of the first change detection light, calculating to obtain the value of a first external magnetic field to be measured according to the frequency of the modulation signal, and acquiring the magnetic field intensity at the first polarization state atom at the same time. The sensitive and compact method for simultaneously measuring the magnetic field intensity and the magnetic field gradient is realized, common-mode noise in magnetic field gradient measurement can be inhibited, and the sensitivity and the precision of magnetic field gradient measurement are improved.