Observation of laser-induced damage on fused silica initiated by scratches

被引:18
|
作者
Bercegol, H [1 ]
Courchinoux, R [1 ]
Josse, M [1 ]
Rullier, JL [1 ]
机构
[1] CEA, CESTA, Dept Lasers Puissance, F-33114 Le Barp, France
关键词
laser-induced damage; high power laser;
D O I
10.1117/12.585290
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
A major issue in high power lasers for fusion- is laser-induced damage on optics and its evolution in time after a large number of shots. Since damage is often characterized by an initial surface crack, its surface usually increases, following an exponential law. Surface scratches have been made on silica samples in order to get calibrated fractures. Then, to test different experimental conditions, we made a variety of scratches in terms of length and depth. The samples are then irradiated by a Nd:YAG laser first at 1064 run (1 omega) then at 355 nm (3 omega). They are successively tested with the scratches facing the laser beam or placed with the scratches on the back surface.
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页码:78 / 85
页数:8
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