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Endommagement laser dans les composants optiques : métrologie, analyse statistique et photo-induite des sites initiateurs

Laurent Gallais 1
1 ILM - ILM
FRESNEL - Institut FRESNEL
Abstract : This thesis deals with laser damage phenomena for nanosecond pulses, in optical components such as glasses, dielectric and metallic thin films.
Firstly, a work is done on the laser damage metrology, in order to obtain accurate and reliable measurement of laser-induced damage probabilities, with a rigorous control of test parameters.
Then, with the use of a specific model, we find densities of laser damage precursors in the case of bulk glasses (few tens by (100µm)3) and in the case of glass surfaces (one precursor by µm3). Our analysis is associated to morphology studies by Atomic Force Microscope to discuss about precursor nature and damage process. Influence of wavelength (from 355 to 1064nm) and cumulated shots is also studied.
Simulations are performed to study initiation mechanisms on these inclusions. This work gives an estimation of complex index and size of the precursor, which permits to discuss about possible detection by non-destructive tools.
Keywords : laser damage
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https://tel.archives-ouvertes.fr/tel-00081051
Contributor : Laurent Gallais <>
Submitted on : Wednesday, June 21, 2006 - 6:15:02 PM
Last modification on : Thursday, January 23, 2020 - 6:22:15 PM
Long-term archiving on: : Tuesday, September 18, 2012 - 2:55:27 PM

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  • HAL Id : tel-00081051, version 1

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Laurent Gallais. Endommagement laser dans les composants optiques : métrologie, analyse statistique et photo-induite des sites initiateurs. Physique Atomique [physics.atom-ph]. Université de droit, d'économie et des sciences - Aix-Marseille III, 2002. Français. ⟨tel-00081051⟩

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