Then, we extend the method to the calculation of resonance fluorescence spectrum with two-photontransition. The results exhibit characteristics different from the one-photon transition.
然后，推广这种方法到双光子跃迁的共振荧光谱计算，获得了与单光子跃迁不同的结果。
2
The results show that the Doppler background due to the near resonance of the intermediate level is eliminated and the signal of two-photontransition can be distinguished from saturation absorption.