Meanwhile, the maximum two-photontransition probability is obtained by choosing the best shaping function under the resonance case.
近共振时，选择最佳相位函数对脉冲整形，可获得最大的双光子跃迁几率。
2
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。
3
The time evolution of atomic occupancy for the system of squeezed vacuum field interacting with two coupling atoms via intensity-dependent coupling in two-photontransition are investigated.