Optical measurement of size and complex index of laser-damage precursors: the inverse problem

Gallais, Laurent; Voarino, Philippe; Amra, Claude

doi:10.1364/josab.21.001073

Cited by 37 publications

(23 citation statements)

References 42 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…10 The theoretical studies of inclusion-initiated damage were based on the resolution of Fourier equation. [13][14][15][16] However, these models have not been substantiated enough to explain the statistical character in experiments. The information on damage density and damage threshold of precursors can be extracted from the experimental curves of damage probability.…”

Section: Introductionmentioning

confidence: 99%

Effect of subsurface impurities of fused silica on laser-induced damage probability

et al. 2014

View full text Add to dashboard Cite

Abstract. A thermal model coupled to statistics is proposed based on damage initiation by heating of sizedistributed inclusions to a critical temperature. The data points of damage probability on the surface of fused silica containing different levels of impurities are measured. By linking the contents of various impurities measured to the calculation for damage probability, the influence of various impurities on damage probability is obtained. The purpose of the work is to present a more thorough analysis of the correlation of subsurface impurities to laser damage probability.

show abstract

Section: Introductionmentioning

confidence: 99%

Effect of subsurface impurities of fused silica on laser-induced damage probability

et al. 2014

View full text Add to dashboard Cite

show abstract

“…The visible He-Ne laser beam is used to monitor the region of damage under test. The density of precursors on the subsurface of sample is very low, and is less than two orders of magnitude in a square with a 100 µm side [14]. Hence, in order to relate the damage morphologies and specific precursors, 12 µm of beam diameter has been used in our experiment to ensure only one precursor under the irradiation of a laser spot.…”

Section: Analysis Of Damage Featuresmentioning

confidence: 99%

“…Nano-absorbing centers such as impurities, contaminants and void fillers will also be embedded on the subsurface of fused silica [2,11,13]. These inclusions can absorb laser energy significantly, raising the temperature around the inclusions high enough to cause damage [14]. A statistical trend has been observed in damage tests due to size distributions [15][16][17][18][19] (Dirac, power law, Gaussian law) of the inclusions.…”

mentioning

confidence: 99%

The size prediction of potential inclusions embedded in the sub-surface of fused silica by damage morphology

et al. 2017

View full text Add to dashboard Cite

Abstract:A model for predicting the size ranges of different potential inclusions initiating damage on the surface of fused silica has been presented. This accounts for the heating of nanometric inclusions whose absorptivity is described based on Mie Theory. The depth profile of impurities has been measured by ICP-OES. By the measured temporal pulse profile on the surface of fused silica, the temperature and thermal stress has been calculated. Furthermore, considering the limit conditions of temperature and thermal stress strength for different damage morphologies, the size range of potential inclusions for fused silica is discussed.

show abstract

“…In order to refine the knowledge on the precursor defects and improve the understanding of the damage initiation process, models of laser-induced damage are needed [47]. The development of such models has begun with the first studies on laser damage, for instance with the work of Hopper and Uhlmann [21] and has lead to more refined models in the recent years [48]- [51].…”

Section: -5mentioning

confidence: 99%

Tridimensional multiphysics model for the study of photo-induced thermal effects in arbitrary nano-structures

Demésy¹,

Gallais²,

Commandré³

2011

J. Eur. Opt. Soc.-Rapid Publ.

Self Cite

View full text Add to dashboard Cite

In the present paper, we detail the implementation of a numerical scheme based on the Finite Element Method (FEM) dedicated to a tridimensional investigation of photo-induced thermal effects in arbitrary nano-structures. The distribution of Joule losses resulting from the scattering of an incident wave by an arbitrary object embedded in a multilayered media is used as source of a conductive thermal transient problem. It is shown that an appropriate and rigorous formulation of the FEM consists in reducing the electromagnetic scattering problem to a radiative one whose sources are localized inside the scatterer. This approach makes the calculation very tractable. Its advantage compared to other existing methods lies in its complete independence towards the geometric, optical and thermal properties of both the scatterer and the medium in which it lies. Among the wide range of domain of application of this numerical scheme, we illustrate its relevance when applied to two typical cases of laser damage of optical components in high power applications.

show abstract

Optical measurement of size and complex index of laser-damage precursors: the inverse problem

Abstract: An indirect optical method for determining size and complex refractive index of laser-damage precursors in optical materials is presented. The method is described in detail, with special attention to all assumptions. Results are given for a series of thin-film SiO 2 layers.

Cited by 37 publications

References 42 publications

Effect of subsurface impurities of fused silica on laser-induced damage probability

Effect of subsurface impurities of fused silica on laser-induced damage probability

The size prediction of potential inclusions embedded in the sub-surface of fused silica by damage morphology

Tridimensional multiphysics model for the study of photo-induced thermal effects in arbitrary nano-structures

Contact Info

Product

Resources

About