摘要
本文回顾了 (Nd3+ ,Yb3+ )∶Ca3(VO4 ) 2 晶体的研究历程 ,通过对晶体结构和对晶体激光性能研究年代的对比 ,认为高的泵浦阈值是由于晶体中存在的对泵浦光和激光散射很强的畴壁结构未被发现而造成的。讨论了极化的原理、建立了极化装置 ,采用Laue定向法和X射线定向仪定向法结合解决了 (Nd3+ ,Yb3+ )∶Ca3(VO4 ) 2 这种大晶格常数 (c =3.80 2 9nm)晶体的定向问题。把晶体的抛光面放入 0 .5mol%的温度为 30℃的硼酸中腐蚀样品 1h ,用显微镜可以观察到畴结构。在～ 110 0℃和电流密度为～ 10 μA/mm2 的条件下极化 2h即可完成极化。变黑的极化样品可以通过把晶体放入马福炉中升温至 850℃ ,保持 1h ,然后降至室温即可消除。
The developments of studies on(Nd 3+ ,Yb 3+ )∶Ca 3(VO 4) 2 crystal were retrospected.On comparing the study ages of its crystal structure and laser properties,it was suggested that the strong scatter of the domain walls caused the high threshold in the early laser experiment,which was unknown at that time.The principle of the polarizing was discussed.Moreover,the polarizing equipment was established.Due to the combination use of the Laue orientation method and the X ray monochrometer orientation method the orientation problem of the large lattice constant crystal such as (Nd 3+ ,Yb 3+ )∶Ca 3(VO 4) 2 was solved.The domain structure can be observed by etching the crystal in a 0.5mol% boric acid on the condition of 30℃ and 1 hour.Single domain structure can be obtained by putting the oriented crystal into the polarizing equipment at～1100℃ and 2 hours with the current density of ～10μA/mm 2,while the darken problem is solved by putting the crystal into the muffle furnace at 850℃ for 1 hour.
出处
《人工晶体学报》
EI
CAS
CSCD
北大核心
2000年第2期164-167,共4页
Journal of Synthetic Crystals
关键词
畴结构
稀土
激光晶体
晶体极化
钕
钒酸钙
镱
Laue method
X ray monochrometer orientation
domain structure
polarizing
rare earth doped laser crystal
