Laser damage growth with picosecond pulses

Abstract : Laser-induced damage growth has been investigated in the subpicosecond regime at 1030 nm. We have herein studied the growth of damage sites initiated on a high-reflective di-electric coating under subsequent laser irradiations at a constant fluence. We show through an experimental approach that growth can be triggered for fluences as low as 50% of the intrinsic damage threshold of the mirror. Moreover, once growth starts, damage areas increase linearly with the number of laser shots. The behavior of defect-induced damage sites has been observed more extensively, and it appears that their growth probability depends on their initiation fluence.
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Martin Sozet, Jérôme Neauport, Eric Lavastre, Nadja Roquin, Laurent Gallais, et al.. Laser damage growth with picosecond pulses. Optics Letters, Optical Society of America, 2016, 41 (10), pp.2342 - 2345. ⟨10.1364/OL.41.002342⟩. ⟨cea-01623412⟩

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