功率调谐曲线的理论分析

Theoretical analysis of the laser power tuning property

在三级微扰理论下，利用频率分裂驻波激光器中“单模对”运转情况下的自洽方程组和光强的互饱和作用对曾报导过的实验现象（不论激光器充Ｎｅ的单同位素还是充Ｎｅ的双同位素，也不管输出光的频差多大，随着腔长的调谐，ｏ光和ｅ光的功率变化方向始终是相反的）进行理论上的说明。

The following experiment phenomenon has been reported before:the power varying trend of olight and elight are opposite to each other with the laser cavity tuned,no matter what kind of Ne(Ne_20 or the mixture of Ne_20 and Ne_22) is used and how much the mode split is.Now based on the theory of threelevel perturbation,the phenomenon is analyzed with the selfconsistent equations and the mutual gain saturation effect of “the single pair of modes” of the frequency splitting standingwave HeNe lasers.