波片提高声光Q开关关断Nd∶YAG激光能力研究  

The Research of Increasing AO Q-Switch′s Ability of Switching in Nd∶YAG Laser by Quarter-waveplate

作　　者：李港[1] 王菲[1] 于欣[1] 陈檬[1] 朱琳[1] 魏剑维[1] 

机构地区：[1]北京工业大学激光工程研究院,北京100022

出　　处：《光子学报》2006年第4期490-493,共4页Acta Photonica Sinica

摘　　要：采用琼斯矢量变换的方法,分析了四分之一波片对入射椭圆偏振光偏振面的变换过程.结合声光相互作用理论和声光介质熔石英在平行和垂直于声场的两个方向具有不同声光优值的特性,理论推导了腔内引入四分之一波片后声光Q开关的布喇格衍射效率公式,计算模拟得出引入四分之一波片能够有效地提高声光Q开关关断连续Nd∶YAG激光的能力·在理论分析的基础上进行了实验验证,实验结果与理论分析符合得很好·The transformation course of a quarter-waveplate＇s rotating polarization plane of elliptically polarized light is deeply analyzed by the Jones vector transformation. According to the principle of A-O interaction and quartz＇s different characteristic in the direction of parallel and perpendicular acoustics field, with a quarter-wave plate being inserted in an AO Q-switch Nd ： YAG laser cavity between mirror and Q-switch, AO Q-switch＇s Bragg diffraction efficiency formula is put out theoretically. Consequently, the conclusion has been drawn by calculating simulation that the ability of a single AO Q-switch＇s switching CW Nd ~ YAG laser is increased. Furthermore, the experimental result is well in accord with theoretical analysis.

关 键 词：激光技术 声光调Q ND:YAG激光 波片 偏振面 

分 类 号：TN248.1[电子电信—物理电子学]