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Opt Express. 2013 Feb 25;21(4):4875-88. doi: 10.1364/OE.21.004875.

Time-resolved imaging of processes associated with exit-surface damage growth in fused silica following exposure to nanosecond laser pulses.

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  • 1Lawrence Livermore National Laboratory, 7000 East Avenue, Livermore, California 94551, USA. Demos1@llnl.gov


We study the dynamics of energy deposition and subsequent material response associated with exit surface damage growth in fused silica using a time resolved microscope system. This system enables acquisition of two transient images per damage event with temporal resolution of 180 ps and spatial resolution on the order of 1 ┬Ám. The experimental results address important issues in laser damage growth that include: a) the specific structural features within a damage site where plasma formation initiates; b) the subsequent growth of the plasma regions; c) the formation and expansion of radial and circumferential cracks; d) the kinetics and duration of material ejection; e) the characteristics of the generated shockwave.

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