13 November 2017 Growth of laser-induced damage on the exit surface of fused silica optics with a millimetric laser beam
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Abstract
The growth of damage sites from micrometric to millimetric scales under high energy laser system conditions have herein been investigated. In this realm, a saturation of the surface growth followed by the rapid expansion of radial cracks has been observed. This observation contrasts with the previously reported exponential behavior1 (for pulse durations above 2 ns) and linear behavior (for pulse durations below 2 ns). The observation of the longitudinal damage structure coupled with fractal analysis has shown that these shifts in growth behavior seem to be correlated with changes in the damage morphology.
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Matthieu Veinhard, Odile Bonville, Roger Courchinoux, Romain Parreault, Jean-Yves Natoli, Laurent Lamaignère, "Growth of laser-induced damage on the exit surface of fused silica optics with a millimetric laser beam", Proc. SPIE 10447, Laser-Induced Damage in Optical Materials 2017, 1044708 (13 November 2017); doi: 10.1117/12.2281124; https://doi.org/10.1117/12.2281124
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