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20 December 2007 Scaling in damage of optical materials by intensive laser radiation
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Abstract
This is a short review of the main reasons of the laser induced damage space scaling, when damage is caused by the first laser shoot (1-on-1) and by the sequence of N laser pulses to one and the same place (N-on-1). It is shown that the laser pulse shape is important to laser damage and scaling in some cases. The accumulation of material property changes and LID threshold for N-on-1 process has strong dependence on the front and on the back pulse slopes: the material property remnant changes become les and eventually accumulative damage disappears when the pulse slopes are increased. When damage scaling is defined by competition of the self-focusing and SBS processes, the long front slope is favored to SBS. The theoretical model explains damage from the first laser shot (1-on-1), damage from sequence of laser pulses (N-on-1 LID), accumulation and damage scaling. The volume damage of transparent dielectrics by laser radiation, when photon energy is more then twice less material ionization (hν<Ei/2) is the main point of interest here.
© (2007) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Evaldas K. Maldutis "Scaling in damage of optical materials by intensive laser radiation", Proc. SPIE 6720, Laser-Induced Damage in Optical Materials: 2007, 672018 (20 December 2007); https://doi.org/10.1117/12.753827
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