偏磷酸盐掺杂对KDP晶体生长与光学性能的影响  

Effects of Metaphosphate Doping on Growth and Properties of KDP Crystals

作　　者：王圣来[1] 高樟寿[1] 傅有君[1] 张吉果[1] 孙洵[1] 李义平[1] 曾红[1] 黄国松[2] 杨镜新[2] 庄亦飞[2] 薛志玲[2] 

机构地区：[1]山东大学晶体材料国家重点实验室,济南250100 [2]中国科学院上海光学精密机械研究所,上海201800

出　　处：《光学学报》2002年第6期753-757,共5页Acta Optica Sinica

基　　金：国家 8 6 3惯性约束聚变领域资助课题

摘　　要：研究了KDP晶体中散射颗粒形成的一种机理。掺杂微量偏磷酸盐即可使KDP晶体中出现散射颗粒 ,随着掺杂浓度提高 ,散射颗粒密度增大。散射颗粒形成的原因在于偏磷酸根具有PO4 四面体端基 ,在晶体生长时容易被生长晶面吸附进入晶格。偏磷酸盐掺杂影响了晶体的光学性能 ,晶体的光损伤阈值也明显地爱到掺杂的影响。A mechanism for the formation of scattering centers in KDP crystals is discussed. The crystals are grown from aqueous solution doped with a minute amount of sodium metaphosphate. It is found that the density of the scatters rises with the increase of the concentration of the additive. The mother liquor macro inclusions also occur in the sector boundaries and pyramidal sectors when the dopant concentration is high enough. The scatters are proposed to be micro solution inclusions caused by the inhibition effect of metaphosphate on the growing faces. Metaphosphate can be easily adsorbed and incorporated into crystal because its end group is PO 3- 4 tetrahedrons. The optical loss of crystals increases with the concentration of the additives. The damage threshold of crystals is also affected obviously by doping.

关 键 词：偏磷酸盐掺杂 KDP晶体 光学性能 散射颗粒 光伤阈值 晶体生长 磷酸二氢钾晶体 

分 类 号：O781[理学—晶体学] O734