Laser-induced damage density of thick optical components

L. Lamaignère; T. Donval; R. Diaz; R. Courchinoux

doi:10.1117/12.2030397

14 November 2013 Laser-induced damage density of thick optical components

L. Lamaignère, T. Donval, R. Diaz, R. Courchinoux

Proceedings Volume 8885, Laser-Induced Damage in Optical Materials: 2013; 88851Q (2013) https://doi.org/10.1117/12.2030397
Event: SPIE Laser Damage, 2013, Boulder, Colorado, United States

Abstract

The determination of surface damage densities of thick optical components is tricky due to the occurrence of non-linear effects (Brillouin and Kerr) that affect the beam propagation through the optics. It is then compulsory to record the beam parameters, mainly the temporal profile, in order to predict and calculate fluence and/or intensity on the rear surface taking into account the non-linear beam propagation. Experiments have been realised with the use of large beams and several phase modulations were activated, leading to numerous peak intensities due to the occurrence of temporal amplitude modulations. Results are first compared in the case of thin optics in order to separate the intrinsic absorptions by the defects which are the weak points of the optics to the effect of the non-linear propagation. The correspondence between the length of the filaments and the beam parameters has been realised in order to highlight the relevant beam parameters that have to be considered for the damage test of thick optics. The whole of measurements and modeling permit us to measure more accurately the rear surface damage of thick optics due to intrinsic defects.

Citation Download Citation

L. Lamaignère, T. Donval, R. Diaz, and R. Courchinoux "Laser-induced damage density of thick optical components", Proc. SPIE 8885, Laser-Induced Damage in Optical Materials: 2013, 88851Q (14 November 2013); https://doi.org/10.1117/12.2030397

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