Shi Meng
Opt Express. 2020 Oct 12;28(21):32033-32041. doi: 10.1364/OE.404809.
The magnetic field response of a Rb-Xe atomic spin comagnetometer operated in the spin-exchange relaxation-free (SERF) regime was investigated. The response model of the comagnetometer to the transverse magnetic fields along the y-axis and the x-axis considering the couple of electron spin and nuclear spin is presented. In the experiment, a high hybrid resonance peak near low-frequency was observed. By fitting the hybrid resonance with the presented response model, a pair of poles at 0.62 Hz and 1.8 Hz were obtained which correspond to the nuclear spin resonance and the electron spin resonance, respectively. The magnetic field response characteristic of the Rb-Xe comagnetometer with different nuclear magnetic fields and electronic magnetic fields was simulated and analyzed. The simulation results indicate that the hybrid resonance frequency can be right-shifted by the larger nuclear magnetic field while the magnetic field suppression factor can be decreased by the larger electron magnetic field. This study is helpful to improve the performance of the atomic spin gyroscope based on the Rb-Xe comagnetometer.
研究了在无自旋交换弛豫（SERF） regime下运行的铷 - 氙原子自旋共磁强计的磁场响应。提出了考虑电子自旋与核自旋耦合的共磁强计对沿y轴和x轴的横向磁场的响应模型。在实验中，观察到低频附近的一个高混合共振峰。通过用所提出的响应模型拟合混合共振，获得了分别对应于核自旋共振和电子自旋共振的0.62 Hz和1.8 Hz的一对极点。模拟并分析了具有不同核磁和电子磁的铷 - 氙共磁强计的磁场响应特性。模拟结果表明，较大的核磁可使混合共振频率右移，而较大的电子磁可降低磁场抑制因子。该研究有助于提高基于铷 - 氙共磁强计的原子自旋陀螺仪的性能。
