光泵磁共振技术是将光抽运技术和磁共振技术相结合的一项实验技术。它分辨率和灵敏度都很高，如今已广泛应用于基础物理研究。本论文拟对光泵磁共振双光子吸收进行深入的研究。首先对光泵磁共振单量子跃迁过程进行了研究，得出了85Rb和87Rb的gF因子大小，地磁场的水平和垂直分量大小，以及偏振片位置和透镜的位置对光抽运信号和磁共振信号的影响。并研究了在单量子跃迁过程中，磁共振信号强度和半高宽度随射频场幅度的变化规律。接着研究了双量子跃迁过程，分为简并和非简并两种情形。探究了磁共振信号强度和半高宽度随射频场幅度的变化规律。最后在射频场低频情形下，研究了多量子跃迁过程。

Optical pumping magnetic resonance technique is an experiment technology combined by optical pumping technology and magnetic resonance technology, which is now widely used in fundamental physics research due to its high resolution and sensitivity. In this thesis, we intend to study optical magnetic resonance of two-photon absorption in depth. First we study optical magnetic resonance of single quantum transition process. We obtain the gF factor and of 85Rb and 87Rb, and the horizontal and vertical components of the geomagnetic field size. We discuss the influence of the position of polarizer and the position of the lens on the pumping signal and resonance signal. We also study how resonance signal intensity and half-width vary with RF field amplitude in the single-quantum transition process. Then we study the double quantum transition process, in the case of degenerate and non-degenerate RF, respectively. We study how resonance signal intensity and half-width vary with RF field amplitude in the double quantum transition process. Finally, under the circumstances of low frequency RF field, we study the multi-quantum transition process.