Fatigue laser-induced damage in transparent materials

Chmel, A. E.

doi:10.1016/s0921-5107(97)00138-4

Cited by 83 publications

(25 citation statements)

References 59 publications

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“…During an S-on-1 measurement in its basic form, each test site is exposed to S pulses of constant fluence F, and the presence or absence of laser-induced damage is determined by ex situ inspection under a microscope. Two main ideas have been developed to explain the decrease of the S-on-1 damage threshold for an increasing pulse number S [4]. First, fatigue was interpreted as an artifact caused by the statistical test without any modification of the material under irradiation [5].…”

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confidence: 99%

Contrasted material responses to nanosecond multiple-pulse laser damage: from statistical behavior to material modification

2013

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This work is dedicated to the study of so-called fatigue effects upon nanosecond laser-induced damage of several crystalline materials and synthetic fused silica irradiated by multiple pulses. The obtained damage probability versus fluence and pulse number data are exploited to determine if the observed fatigue is due to statistics (the more often the material is irradiated, the higher the probability for it to be damaged) or to material modification under irradiation. Whereas 1064 nm irradiation seems to be responsible for statistic behavior, 355 nm irradiation generates material modifications in the case of synthetic fused silica.

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confidence: 99%

Contrasted material responses to nanosecond multiple-pulse laser damage: from statistical behavior to material modification

2013

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“…2 (a)). One probable explanation of this phenomena is an arise of heat accumulation and defect incubation effects observed in transparent dielectrics 40 as the decrease of the damage threshold in the multi-shot regime is obvious (see Fig. 2 (a)).…”

Section: Optical Breakdown Mechanismmentioning

confidence: 99%

Laser-induced damage in photopolymers thin films with ultrashort pulses

et al. 2014

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We characterize laser-induced damage threshold (LIDT) in transparent photopolymers by a sub-ps laser pulses of 515 nm wavelength representing case of high light intensities. Five different photopolymers (SZ2080, OrmoComp, SU-8, PDMS and PMMA) widely used in the laser lithography are investigated. The relationship of the damage threshold and optical band-gap energy of the polymers indicating possible damage mechanism is considered. Incubation model validating damage threshold dependence on the number of laser pulses is studied as well. The obtained characteristic values of LIDT reveal potential of photopolymers and their possible applications in high power laser systems.

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“…It has been known for some time that material surfaces, when irradiated with multiple high-power laser pulses, become damaged at pulse energies far below the single-shot damage threshold [1,2]. There are a few models of the fundamental mechanisms explaining that accumulative behavior of LIDT (Laser-induced damage threshold): "defect incubation" -change in electronic or chemical material structure during laser-matter interaction [3] and temperature increase due to pulse-to-pulse "heat accumulation" [4].…”

Section: Introductionmentioning

confidence: 99%

The effect of pseudo-accumulation in the measurement of fatigue laser-induced damage threshold

et al. 2008

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Laser-induced damage threshold determination as a function of the number of incident pulses on a specific optic is a classic problem in laser damage studies. There are several models of the fundamental mechanisms explaining the fatigue laser damage behavior including temperature accumulation and changes of electronic or chemical material structure. Herewith we discuss the effects of unstable laser radiation on S-on-1 laser-induced damage probability. Numerical simulations of S-on-1 measurements for specific cases of defect densities, spot sizes and beam jitters are performed. It is demonstrated that the statistical effects of "pseudo-accumulation" reasoned by unstable laser radiation in transparent dielectrics containing nanometer sized defects leads to accumulation-like behavior. The magnitudes of the random beam walking and the energy fluctuations are directly related to the damage probability. Experimental results are also introduced to illustrate the theoretical results.

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Fatigue laser-induced damage in transparent materials

Cited by 83 publications

References 59 publications

Contrasted material responses to nanosecond multiple-pulse laser damage: from statistical behavior to material modification

Contrasted material responses to nanosecond multiple-pulse laser damage: from statistical behavior to material modification

Laser-induced damage in photopolymers thin films with ultrashort pulses

The effect of pseudo-accumulation in the measurement of fatigue laser-induced damage threshold

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