GILBERTO ANDRÉ DA ROCHA
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Artigo IPEN-doc 26082 Measurement of optical materials ablation threshold dependence on the dispersion of ultrashort pulses2019 - ROCHA, GILBERTO A. dos S.; VIEIRA JUNIOR, NILSON D.; SAMAD, RICARDO E.The ablation threshold for ultrashort pulses of common optical materials (BK7 glass, Sapphire and Fused Silica), was measured using the D-Scan technique, for positive and negative dispersions covering pulse durations from 30 fs to 100 fs. We observed that the ablation threshold for a single shot and at saturation increase with the pulse duration and the material bandgap, and also that defects which decrease the threshold values accumulate faster as the material bandgap increases.