Parametric study of laser-induced damagegrowth in fused silica optics with large beams at351 nm, Part 2 : Fractal analysis
2020
The impact of laser fluence and pulse duration on both the rate and
probability of growth of laser-induced damage sites has been reported and
analyzed statistically in a companion paper. In this paper, we report and
analyze the volume morphology of damage sites during the growth process in
fused silica optical components, at 351 nm, under various laser fluence
and pulse durations. Fractal analysis has been used to quantify the bulk
damage morphology. A clear link between the damage morphology and laser
pulse duration has been observed. The results from fractal analysis allows
for a better understanding of the results from the stochastic approach
developed in our companion paper. More specifically, fractal analysis
shows how the laser parameters such as fluence and pulse duration impact
the phenomenology and the dynamics of the growth process.
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