基于无光移和无死区原子取向的单束调幅标量磁测量
Light-shift-free and dead-zone-free atomic orientation based scalar magnetometry using a single amplitude-modulated beam
摘要：
光频移引起的探测盲区和航向误差是光泵标量磁测量中的两个重要问题。我们介绍了一种基于原子取向的单束磁强计方案，同时解决这些问题，使用极化反转和路径弯曲的赫里奥特腔。这里，反射镜插入到腔中，使光路在中间弯曲，并将它们分成两个分离的正交区域，以避免检测死区。此外，在每个光学区域的中心添加半波片，使得光偏振在每次通过波片时翻转，并且光偏移效应在空间上被平均。这种操作被证明可以消除由交流光偏移引起的未被注意的航向误差。该方法具有较强的鲁棒性，易于在其它原子器件中推广应用。
英文摘要：
Detection dead zones and heading errors induced by light shifts are two important problems in optically pumped scalar magnetometry. We introduce an atomic orientation based single-beam magnetometry scheme to simultaneously solve these problems, using a polarization-reversing and path-bending Herriott cavity. Here, a reflection mirror is inserted into the cavity to bend the optical paths in the middle, and divide them into two separated orthogonal regions to avoid the detection dead zone. Moreover, half-wave plates are added in the center of each optical region, so that the light polarization is flipped each time it passes the wave plates and the light shift effects are spatially averaged out. This operation is demonstrated to eliminate the unnoticed heading errors induced by ac light shifts. The methods developed in this paper are robust to use, and easy to be applied in other atomic devices.
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