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12 April 2001 Quantitative study of laser damage probabilities in silica and calibrated liquids: comparison with theoretical prediction
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The experimental setup developed in Marseille for the laser damage testing allows a localized study. Indeed the use of a 25 micrometers for the waist of the focused beam, permits to de-correlate the extrinsic damage due to the micronic defects (visible under microscope) for the intrinsic ones (non-detectable before damage with conventional imaging systems). The probability of damage versus incident fluence is an S curve given in the range of two thresholds, SL and SH, the low and high damage thresholds. Most often the shape of probability damage curves are different between the intrinsic and the extrinsic cases. In our arrangement the beam size and the extrinsic defect size are in the same range, so by pointing at these visible defects it is possible to determine their specific threshold, and the density of defect is directly obtained from the optical image. Therefore a specific study of the intrinsic zones by pointing the beam at a zone free of extrinsic point, allows us to focus our attention only on these invisible defects. These particles are supposed to be nano-sized. The highlight and the identification of these nono-precursors is the aim of this paper.
© (2001) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Jean-Yves Natoli, Laurent Gallais, Hassan Akhouayri, and Claude Amra "Quantitative study of laser damage probabilities in silica and calibrated liquids: comparison with theoretical prediction", Proc. SPIE 4347, Laser-Induced Damage in Optical Materials: 2000, (12 April 2001);


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