If you wish to move this Photon Energy and keep it at bay until you can get more of the population prepared for it, then you must become more enlightened.

Using rate equation theory, the equation group including the population inversion density of the gain medium, photon density and the absorber ground state population density is acquired.

With the increase of the average photon number of the coherent light field, the oscillation frequency of the atomic population inversion increases correspondingly.