Heat treatment of fused silica optics repaired by CO2 laser

被引：1
|
作者：
Doualle, Thomas [1 ]
Gallais, Laurent [1 ]
Cormont, Philippe [2 ]
Rullier, Jean-Luc [2 ]
机构：
[1] Aix Marseille Univ, Inst Fresnel UMR 7249, Cent Marseille, CNRS, F-13013 Marseille, France
[2] CEA CESTA, F-33116 Le Barp, France
来源：
LASER-INDUCED DAMAGE IN OPTICAL MATERIALS: 2015 | 2015年 / 9632卷
关键词：
fused silica; CO2; laser; isothermal annealing; laser damage; finite element modeling; LIDT; LASER; MITIGATION; SURFACE; GLASS;
D O I：
10.1117/12.2194967
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In the context of high power laser applications, we study the effect of a heat treatment on CO2 laser mitigation of laser damage sites on fused silica samples. The isothermal annealing in a furnace is investigated and then compared to the local annealing by CO2 laser irradiation that is applied to enhance laser damage resistance on mitigated sites. Before and after isothermal annealing, we study the sites morphology, the evolution of residual stress and the laser-induced damage threshold measured at 355nm, 3ns. The results show that the initial laser damage probabilities were significantly improved after annealing at 1050 degrees C for 12 hours. These results are compared to simulations with a thermo-mechanical model based on finite-element method.
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收藏
页数：8
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