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

页码：695 / 701

页数：7

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