周期极化LiNbO3晶体中电极布置对反转畴扩张的影响

利用外加电场极化的方法,分别研究了三种不同方式布置的极化电极对C向切割LiNbO_{3< /sub>晶体极化反转畴扩张的影响.实验结果表明在相同极化条件下，当极化电极长度方向与六边 形反转畴一对边呈90°和0°角时，极化扩张速度分别为0.089μm/ms和0.011μm/ms.实验结果揭示，为了有效地控制极化占空比，在制备一维准相位匹配LiNbO3晶体时应 避免极化电极与六边形反转畴壁中一对边呈90°的情况. 关键词： 周期极化 极化扩张 准相位匹配}

The effect of electrode configuration in domain broadening of periodically poled LiNbO3

The effect of LiNbO₃ electrode with three different configurations o n domain broadening by using poling method appling external electric field applying exter nal electric field is studied. The effect of poling electrode configuration in d omain broadening is studied. The experiment demonstrated that under the same pol ing condition, the broadening velocities are 0.089μm/ms and 0.011μm/ms when th e angle between the poling electrode and the diagonals of hexagonal domain nucl eus are 90°and 0°，respectively, therefore the circumstance of 90°angle betwe en poling electrode and the diagonals of hexagonal domain nucleus should be avoi ded in fabricating one-dimension nonlinear photonic crystal.