Two techniques for early detection of pulsed laser induced damage in optical materials

Jeen, J A M; Green, J M

doi:10.1088/0022-3735/17/3/005

Cited by 10 publications

(3 citation statements)

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“…In our opinion, the available experimental data make it possible to propose a general theoretical model for intrinsic ID nucleation. Furthermore, it is well known (see, e.g., [5,7,[16][17][18][19][20] and elsewhere) that LID of transparent solids under multiple-pulse 'prethreshold' irradiation is also the result of irreversible processes stored in the material.…”

Section: Pre-threshold Damagementioning

confidence: 99%

Common approach to the problem of defect nucleation in solids under 'pre-threshold' laser irradiation

Kusov¹,

Kondyrev²,

Chmel³

1990

J. Phys.: Condens. Matter

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A universal mechanism for initial defect nucleation in metals and transparent dielectrics, as the sample is irradiated by 'pre-threshold' laser pulses, is proposed. The theoretical model uses the newly described effect of local accumulation of elastic energy due to anharmonic parametric resonance between vibrations localised in an inhomogeneity of the crystal lattice and laser-produced acoustic waves in the solid. Thermal density fluctuation is considered as a universal inhomogeneity of solid matter. The elastic modulus plays the role of an excited parameter, and the coupling constant between this parameter and the elastic wave is the Gruneisen coefficient. Metals and transparent dielectrics have different mechanisms of acoustic wave generation due to laser beam interaction with matter. The thermoelastic effect arising due to pulsed heating of the irradiated region is a source of acoustic waves in metals. Hyperacoustic waves are generated due to stimulated Brillouin scattering in the case of transparent dielectrics. The model explains the main characteristics of laser-induced damage in solids subjected to 'pre-threshold' irradiation. Quantitative estimates have shown that the critical values of the acoustic wave amplitude, under which the proposed mechanism is effective. are within the error bars of the experimental values for both transparent dielectrics (cu-Al,O,crystals, amorphous S O z ) and a typical metal (AI). Several theoretical predictions are compared with original, previously published, results.

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Section: Pre-threshold Damagementioning

confidence: 99%

Common approach to the problem of defect nucleation in solids under 'pre-threshold' laser irradiation

Kusov¹,

Kondyrev²,

Chmel³

1990

J. Phys.: Condens. Matter

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“…This interaction mechanism being determined by radiation absorption dynamics which is related to the optics surface quality, the use of OAE could help to determine the quality of a metal surface. The present work explores the possibility to use OAE in a study of laser optics resistance to laser induced damage [4, 5,14,15].…”

mentioning

confidence: 99%

“…An estimate of the temperature rise averaged over the thermal diffusion depth AT,., during the pulse can be obtained by solving of the quasi-stationary problem of the thermoelasticity, valid there due to stresses on the irradiated surface is zero [15]. In the above-mentioned approximation AT,,,, is related to displacement of the reflective surface U by the expression In (2) a, v, aT are the thermal diffusivity coefficient,…”

mentioning

confidence: 99%

Optical-acoustic effect in laser optics investigations

Aver'anov¹,

Baloshin²,

Bukhanov³

et al. 1990

Rev. Phys. Appl. (Paris)

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Parameters of the acoustic signals (AS) excited in the massive Al, Be and Cu mirrors by TEA CO2- and Nd : glass-laser pulses were investigated. Correlations between the AS parameters and an emergence of different types of laser-induced damage such as evaporation of heat insulated defects, melting and optical breakdown off irradiated surface have been found. The possibility to make a nondisturbing prediction of the metal mirror resistance to laser-induced damage has been shown

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Optical Detection and Analysis of Non-Linear Optoacoustic Waves

Diaci

Možina

1991

Physical Acoustics

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Two techniques for early detection of pulsed laser induced damage in optical materials

Cited by 10 publications

References 0 publications

Common approach to the problem of defect nucleation in solids under 'pre-threshold' laser irradiation

Common approach to the problem of defect nucleation in solids under 'pre-threshold' laser irradiation

Optical-acoustic effect in laser optics investigations

Optical Detection and Analysis of Non-Linear Optoacoustic Waves

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