The multiple radio frequency (RF) photon transitions of optical magnetic resonance of ${}^{133}\mathit{Cs}$ atoms are demonstrated theoretically and experimentally. In the presence of a static magnetic field with a fixed direction, the atomic resonance absorption signals irradiated by a circularly polarized light are observed under the condition of different intensities and directions of RF field in our experiment. We find that both the RF intensity and direction can modify the character of the observed signals. If the RF intensity is strong enough, when the RF field is perpendicular to the static magnetic field, only odd number RF photon resonance transitions can be observed. When the RF field is parallel to the static field, no resonance occurs in the experiment. However, if it is between the two cases, all positive integer resonance transitions will be recorded completely. Furthermore, both the analytical solution based on Floquet perturbation theory and the numerical simulation based on Liouville equation strongly support the experimental results. These phenomena enable us to reveal the optical magnetic resonance dynamics more deeply.

光学磁共振的多重射频 (RF) 光子跃迁 ${}^{133}\mathit{CS}$原子被理论和实验证明。在固定方向的静磁场存在下，我们的实验在不同强度和方向的射频场条件下观察了圆偏振光照射的原子共振吸收信号。我们发现射频强度和方向都可以改变观测信号的特征。如果射频强度足够强，当射频场垂直于静磁场时，只能观察到奇数次射频光子共振跃迁。当射频场与静态场平行时，实验中不会发生共振。但是，如果介于这两种情况之间，则会完整记录所有正整数共振跃迁。此外，基于 Floquet 微扰理论的解析解和基于 Liouville 方程的数值模拟均有力地支持了实验结果。这些现象使我们能够更深入地揭示光学磁共振动力学。