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.
利用速率方程理论，得到包含激光增益介质反转密度、光子密度和饱和吸收介质基态布居数密度的速率方程组。
3
With the increase of the average photon number of the coherent light field, the oscillation frequency of the atomic population inversion increases correspondingly.