本文给出一均匀增宽的三能级原子模型,在泵浦场和激光场同时存在时,讨论了双光子激光的增益、频率位移及弱泵浦时,稳态运转的阈值条件。同时讨论了相干泵浦对激光线宽的影响。其结果和仅存在非相干泵浦和泵浦不存在时的结果作了比较。

In this paper, the model which consists of homogeneous broadened three atomic level is proposed, when both the pump classical field and laser field exist we discuss the gain, frequency pulling and threshold condition of the weak pumping. We also discuss the effect of the coherent pumping on the laser line width. The results are compared with what derived for non-coherent pumping and no-pumping.