本文研究在六能级系统中的R_(35),T_(34)和S_(54)过程的相互作用.本文从理论研究中发现在偏频泵作用下,这些多光子过程的相互作用也会导致激光谱线的分裂.这就是偏频泵交流斯塔克(AC Stark)效应.这三个过程都受到饱和效应和电偶极增强效应的影响,但其效果各不相同.利用这一特点,可以通过注入远红外信号以区分各过程对系统增益和偏频泵交流斯塔克效应的贡献.

The interactions among R35, T34 and S54 processes in a six-level system were studied. Near the cross point of the resonant curves of these processes in the multiphoton resonance diagram of the six-level system, such interactions should be very strong. We found theoretically that in the case of off-resonant-pumpnig, the interactions among these multiphoton prooesseg should also lead tosplitting of the laser spectral line, which is called off-resonant-pumping AC Stark effect. Because tJhe influenoes of saturation eifeot and electric dipole transition enhancement effect were not the same for different mnltiphoton processes^ oontributions of different nmltiphoton processes to the o￡f-resonant AC Stark effoot could be distinguished by the injection of FIR signal into the system