Accurate optically pumped magnetometer based on Ramsey-style interrogation
Accurate optically pumped magnetometer based on Ramsey-style interrogation
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DOI：
10.1364/ol.449180
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发表时间：
2022-03-01
期刊：
影响因子：
3.6
通讯作者：
Riis, Erling
中科院分区：
文献类型：
--
作者：
Hunter, Dominic;Dyer, Terry E.;Riis, Erling
在光泵磁力计中，自旋准备和读出过程中的光原子相互作用会导致不准确。我们展示了一种新的，据我们所知，检测策略，利用脉冲自由感应衰减模式的询问序列来抑制这些系统误差。该技术的前提是监测动态的预取向的原子自旋，因为它们在黑暗的时间间隔内不受干扰地发展，随后施加一个时间延迟的光脉冲来推断自旋状态的相位。这种检测模式将光移不准确度降低到0.6 nT以内，可用于各种高精度原子磁力测量实验。由Optica Publishing Group根据Creative Commons Attribution 4.0许可条款发布。
Light-atom interactions during spin preparation and readout in optically pumped magnetometers can lead to inaccuracies. We demonstrate a novel, to the best of our knowledge, detection strategy that exploits an interrogation sequence in the pulsed free-induction-decay modality to suppress these systematic errors. The technique is predicated on monitoring the dynamics of preoriented atomic spins as they evolve unperturbed during a dark interval, by subsequently applying a time-delayed optical pulse to infer the spin state's phase. This detection mode reduced light shift inaccuracies to within 0.6 nT, and could be employed in a wide variety of high-precision atomic magnetometry experiments. Published by Optica Publishing Group under the terms of the Creative Commons Attribution 4.0 License.