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。
Introduce the three energy level of EDFA and deduce the rate equation for population changes and propagation equation for pump and signal beams.
本论文的主要内容有：1、介绍了掺铒光纤放大器的三能级结构，并推导了掺铒光纤放大器的原子速率方程和功率传输方程。
应用推荐