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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。
The Nd, Y: SrF2 laser crystals were annealed in the temperature range of 1060 ~ 1100 ℃ under vacuum and the X-ray double crystal rocking curves of Nd, Y: SrF2 crystals before and after high temperature annealing were measured. The flexural strength, Stress distribution and wavefront distortion map. The results show that high temperature annealing can effectively improve the crystalline properties, flexural strength, stress distribution and optical uniformity. When the annealing temperature is 1080 ℃ and the annealing time is 36h, the obtained crystal has the best comprehensive performance, and the temperature and time are the best annealing parameters.