Title of article :
Optimization of a laser mitigation process in damaged fused silica
Author/Authors :
S. Palmier، نويسنده , , L. Gallais، نويسنده , , M. Commandré، نويسنده , , P. Cormont، نويسنده , , R. Courchinoux، نويسنده , , L. Lamaignère، نويسنده , , J.L. Rullier، نويسنده , , P. Legros، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2009
Pages :
5
From page :
5532
To page :
5536
Abstract :
One of the major concerns encountered in high power laser is the laser-induced damage of optical components. This is a main issue of the development of the Europeʹs biggest laser, known as Laser Méga Joule (LMJ) especially in the section where the beam wavelength is 351 nm. This study deals with the development of a laser treatment process to improve the laser damage resistance of silica optical components. First, by irradiating the component at 355 nm in the nanosecond regime, defects of the silica optic are revealed and evolve as damage. Next, the damaged sites are irradiated with a CO2 laser at a 10.6 μm wavelength in order to melt and evaporate the silica in the damage neighborhood. In this study, we performed a variation of the CO2 laser parameters to obtain the most efficient stabilization. To check this stabilization, damage resistance tests were performed with an UV laser representative of the LMJ (at 355 nm/2.5 ns). The results show that we can stabilize weak points and thereby make the component resistant to subsequent UV laser irradiation.
Keywords :
Laser mitigation process , Silica , Laser-induced damage
Journal title :
Applied Surface Science
Serial Year :
2009
Journal title :
Applied Surface Science
Record number :
1011328
Link To Document :
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