退火处理对Nd,Y:SrF_2激光晶体结构缺陷的影响  

Influence of Annealing Treatment on Structure Defects of Nd,Y:SrF_2 Laser Crystals

作　　者：刘荣荣[1,2] 朱基千[1] 刘军芳[1] 王静雅[2] 苏良碧[2] 唐飞[2] 姜大朋[2] 钱小波[2] 吴庆辉[2] 

机构地区：[1]同济大学材料科学与工程学院,上海201804 [2]中国科学院上海硅酸盐研究所人工晶体研究中心,上海200050

出　　处：《中国激光》2017年第3期170-175,共6页Chinese Journal of Lasers

基　　金：国家重点研发计划(2016YFB0402101);中国科学院战略性先导科技专项(B类)(XDB16030000);国家自然科学基金(51432007)

摘　　要：在1060~1100℃的温度范围内和真空条件下对Nd,Y:SrF_2激光晶体进行了高温退火处理,测试了高温退火前后Nd,Y:SrF_2晶体的X射线双晶摇摆曲线、抗弯强度、应力分布和波前畸变图谱。结果表明,高温退火能有效改善晶体的结晶性能、抗弯强度、应力分布和光学均匀性。当退火温度为1080℃、退火时间为36h时,获得的晶体综合性能最优,该温度和时间为最佳退火参数。Under the vacuum condition, the Nd, Y：SrF2 laser crystals were annealed at high temperatures from 1060 ℃ to 1100 ℃. The X-ray double crystal rocking curve, the bending strength, the stress distribution, and the wave-front aberration spectrum of Nd, Y： SrF2 crystals were measured before and after annealing. The results show that the crystallization properties, the bending strength, the stress distribution and the optical homogeneity of the crystals are improved by annealing at a high temperature. When the annealing temperature is 1080 ℃ and the annealing time is 36 h, the crystal is obtained with the best integrated performance, and hence the annealing temperature of 1080 ℃ and the annealing time of 36 h are the optimal annealing parameters.

关 键 词：材料 Nd Y:SrF2晶体 退火 结晶性能 抗弯强度 应力分布 光学均匀性 

分 类 号：O77[理学—晶体学]