种子注入光学参量振荡器的纵模特性研究

Characterization of Longitudinal Mode in an Injection Seeded Optical Parametric Oscillator

主要对种子注入单纵模光学参量振荡器的纵模特性进行了理论和实验研究。利用数值模拟方法，对光参量振荡器中的场强方程进行了求解，得出在种子注入情况下，单纵模脉冲光参量振荡器的输出光频率主要由谐振腔纵模频率决定，而注入光频率与腔纵模频率的偏差应小于腔纵模间隔。并利用多纵模的Ｈｅ－Ｎｅ激光器作为种子光。

The theoretical and experimental study on the single longitudinal mode of an injection seeded optical parametric oscillator is presented. The numerical result shows that the frequency of the parametric output was determined by the longitudinal mode frequency of the cavity, if the frequency shift of the seeder was smaller than the axial mode separation. It was supported by an experiment on a single longitudinal mode BBO OPO which was seeded by a multi longitudinal mode He Ne laser.