一、前言在激光调制晶体 LiNbO_3中,即使只有痕量的 Pt 存在,也是十分有害的。因 Pt 粒子在LiNbO_3熔体中不溶解,一旦被捕获到 LiNbO_3晶体中去,就成为固态第二相粒子,成为LiNbO_3中的光散射中心和固体包裹物。这种包裹物的特性与基体不同,在高功率密度激光通过LiNbO_3晶体时,有 Pt 粒子的地方,易于遭到破坏,这就降低了 LiNbO_3的破坏阈值。当晶体 First, the preface In the laser crystal LiNbO_3, even if only traces of Pt exist, but also very harmful. Because Pt particles do not dissolve in the LiNbO_3 melt, once trapped into the LiNbO_3 crystal, they become solid second phase particles, becoming the light scattering center and solid inclusion in LiNbO_3. The characteristics of this kind of package are different from the matrix. When high power density laser passes through the LiNbO_3 crystal, Pt particles are easily damaged, which reduces the damage threshold of LiNbO_3. When crystal