Yao Han, Li Yang, Ma Danyue, Cai Jiashu, Zhao Junpeng, Ding Ming
Opt Express. 2018 Oct 29;26(22):28682-28692. doi: 10.1364/OE.26.028682.
An acousto-optic modulation (AOM) detection method is demonstrated to detect the atomic Larmor precession frequency in an all-optical K-Rb atomic magnetometer operated in Spin-Exchange Relaxation Free (SERF) regime. Magnetic field sensitivity of 14 fT/Hz was achieved by employing the uniform design (UD) [Acta Math Appl Sin.3, 363 (1980)] and subsequently optimizing the AOM modulation conditions. Results were compared to those of Faraday and the balanced polarimetry method in the same magnetometer. The AOM detection method has several advantages, such as small volume, no extra magnetic shielding for the modulator, high measurement signal-to-noise ratio and stability. It has a good prospect for compact and multi-channel atomic magnetometers.
一种声光调制（AOM）检测方法被证明可用于检测在自旋交换无弛豫（SERF）状态下工作的全光学钾铷原子磁力计中的原子拉莫尔进动频率。通过采用均匀设计（UD）[《应用数学学报》3, 363 (1980)]并随后优化AOM调制条件，实现了14 fT/Hz的磁场灵敏度。将结果与同一磁力计中法拉第和平衡偏振测量法的结果进行了比较。AOM检测方法具有几个优点，例如体积小、调制器无需额外的磁屏蔽、测量信噪比高以及稳定性好。它在紧凑型和多通道原子磁力计方面具有良好的前景。
