Strengthening of poly-crystalline (ceramic) Nd:YAG elements for high-power laser applications

被引：17
|
作者：
Feldman, Revital [1 ,2 ]
Golan, Yuval [2 ]
Burshtein, Zeev [2 ]
Jackel, Steven [1 ]
Moshe, Inon [1 ]
Meir, Avi [1 ]
Lumer, Yaakov [1 ]
Shimony, Yehoshua [1 ]
机构：
[1] Soreq NRC, Div Appl Phys, IL-81800 Yavne, Israel
[2] Ben Gurion Univ Negev, Dept Mat Engn, IL-84105 Beer Sheva, Israel
来源：
OPTICAL MATERIALS | 2011年 / 33卷 / 05期
关键词：
YAG; Poly-crystalline; Laser ceramics; Mechanical properties; Weibull analysis; ND-YAG;
D O I：
10.1016/j.optmat.2010.09.013
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In the last decade, poly-crystalline (ceramic) Nd:YAG components emerged as very promising candidates for high-power lasers, exhibiting some advantages over single-crystal Nd:YAG ones. Such devices are required to endure high thermal stress during operation. In our present work we present experimental results on the strengthening of poly-crystalline YAG and Nd:YAG fine-ground components by chemical etching in hot ortho-phosphoric acid. The strength of poly-crystalline Nd:YAG laser rods was measured inside a laser head by applying the pump power till rod fracture. A factor of 3 increase in the fracture longitudinal heat power density for etched poly-crystalline Nd:YAG rods as compared to standard commercial poly-crystalline rods was obtained. This effect is similar to our previous results on single-crystal Nd:YAG laser rods which showed a factor of 3.6-5.0 increase in tensile strength by the same treatment. A modified Weibull analysis was used to assess the fracture probability parameters. (C) 2010 Elsevier B.V. All rights reserved.
引用
收藏
页码：695 / 701
页数：7
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