Cr^(3+)∶BeAl_2O_4单晶的特性及生长工艺的改进  

Properties and Growth Method Development of Alexandrite Crystals

作　　者：张新民[1] 朱汝德[1] 柴耀[1] 吴光照[1] 

机构地区：[1]中国科学院上海光学精密机械研究所

出　　处：《人工晶体学报》1999年第2期210-214,共5页Journal of Synthetic Crystals

基　　金：国家863高技术资助项目

摘　　要：描述了掺Ｃｒ３＋离子的紫翠宝石（Ｃｒ３＋∶ＢｅＡｌ２Ｏ４）单晶的晶体结构、物理性质、晶体的吸收光谱与发射光谱及其激光特性。讨论了用引上法生长Ｃｒ３＋∶ＢｅＡｌ２Ｏ４晶体的一些工艺问题中。引上法晶体生长过程中选用较慢的提拉速度、较快的转速生长较大直径的晶体的工艺参数，能够生长出高质量的Ｃｒ３＋∶ＢｅＡｌ２Ｏ４单晶体。我们的实验表明，采用温梯法也能生长出高质量的Ｃｒ３＋∶ＢｅＡｌ２Ｏ４单晶。与提拉法相比，温梯法减少了原料对环境的污染；易于实现自动温度程序控制；The physical properties,the crystallization behaviors,the spectra and laser properties of alexandrite (Cr 3+ ∶BeA1 2O 4) crystal are described. Some problems with growing Cr 3+ ∶BeA1 2O 4 crystals by Czochralski (CZ) method were discussed. In order to make it possible to grow high quality Cr 3+ ∶BeA1 2O 4 crystal by means of CZ method the growth process,such as lower pulling velocity, faster rotating speed and growing large diameter crystal technique must be used. Another growth method, such as the temperature gradient method has been used for crystal Cr 3+ ∶BeA1 2O 4 growth successfully. The temperature gradient method as compared with CZ method can decrease pollution from raw materials, and be ease to achieve computer automatic control for crystal growth.

关 键 词：激光晶体 晶体生长 单晶 掺铬离子 

分 类 号：O782[理学—晶体学] TN244.03[电子电信—物理电子学]