Opt Lett. 2018 Dec 1;43(23):5825-5828. doi: 10.1364/OL.43.005825.
We report experimental on-sky observations of atomic spin precession of mesospheric sodium driven by polarization modulation of a continuous-wave laser. A magnetic resonance was remotely detected from the ground by observing the enhancement of induced fluorescence when the driving frequency approached the precession frequency of sodium in the mesosphere, between 85 and 100 km altitude. The experiment was performed at La Palma, and the uncertainty (0.2 kHz) in the measured Larmor frequency (≈260 kHz) corresponded to an error in the geomagnetic field of 0.3 mG. The results are consistent with geomagnetic field models and with the theory of light-atom interaction in the mesosphere.
我们报告了连续波激光偏振调制驱动中层钠原子自旋进动的实验天文观测结果。当驱动频率接近中层钠原子的进动频率（85 至 100km 高空）时，通过观察感应荧光的增强，从地面远程检测到磁共振。该实验在拉帕尔马进行，测量的拉莫尔频率（≈260kHz）的不确定度（0.2kHz）对应于地磁场的误差为 0.3mG。结果与地磁场模型和中层大气中光-原子相互作用的理论一致。
