中国激光, 2016, 43 (10): 1001009, 网络出版: 2016-10-12
激光晶体的键合条件研究
Bondability Criterions of Laser Crystals
激光光学 激光晶体 直接键合 哈梅克常数 均方根粗糙度 峰顶半径 laser optics laser crystals direct bonding Hamaker constant root-mean-square roughness summit radius
摘要
键合晶体作为激光工作物质,可以有效地控制热负载,减小端面的变形和损伤,降低光束的波前畸变。基于键合面缝隙闭合理论,分析了激光晶体的键合条件,计算了Nd∶YAG、Nd∶YVO4和蓝宝石晶体在光胶时键合面处的哈梅克常数和表面能,讨论了这三种材料在制作键合晶体时需要满足的条件,对比了制作的难易程度。以YAG-Nd∶YAG晶体为例进行了光胶实验,验证了键合条件的合理性;对热处理后的YAG-Nd∶YAG键合晶体进行抽运光照射实验,证明了键合强度和键合稳定性满足实验要求。提出的晶体键合条件判断方法可以为键合晶体的选材和键合工艺的参数优化提供参考。
Abstract
As laser materials, bonding crystals have an efficient thermal management. They can decrease the deformation and fracture at the end face of crystals, and reduce wavefront distortion of laser. Based on the bonding interface gap closing theory, the bondability criterions of laser crystals are analyzed, the Hamaker constant and surface energy are calculated when Nd∶YAG, Nd∶YVO4 and sapphire are optical contacting, the bondability criterions for the three composite crystals are discussed, and the difficulty in crystal bonding is compared. Taking the YAG-Nd∶YAG crystal for example, the optical contacting experiment verifies the rationality of the bondability criterions, and the pump experiment for the bonding crystal after heat treatment proves that the bonding strength and the bonding stability fulfill the experimental requirements. The method for judging crystal bondability criterions provides references for selecting bonding materials and optimizing bonding process parameters.
邹岩, 吴婷, 李之通, 惠勇凌, 姜梦华, 雷訇, 李强. 激光晶体的键合条件研究[J]. 中国激光, 2016, 43(10): 1001009. Zou Yan, Wu Ting, Li Zhitong, Hui Yongling, Jiang Menghua, Lei Hong, Li Qiang. Bondability Criterions of Laser Crystals[J]. Chinese Journal of Lasers, 2016, 43(10): 1001009.