UV-induced aging leading to laser damage in the bulk of fused silica

Wagner, Frank; Beaudier, Alexandre; Natoli, Jean-Yves

doi:10.1117/12.2319013

Cited by 1 publication

(2 citation statements)

References 21 publications

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“…Conversely, while the ablated surface released an intermittently strong shock wave, it also formed a rarefaction wave converging toward the ablation center 3,22 as depicted in the third stage of Figure 3. The last phenomenon causes the re‐deposition of the slow particulate ablation products on the substrate (molecules fragments of the matrix) where condensation occurs, while the fate of most of the lightest ablation products depends on the gas flow outside the irradiated substrate 23 . Upon interaction with the material, the laser‐induced shock wave undergoes inward propagation as a stress wave consisting of three distinct types of elastic waves: surface wave, longitudinal wave (compression/tension wave), and transverse wave (shear wave).…”

Section: Resultsmentioning

confidence: 99%

“…The last phenomenon causes the re-deposition of the slow particulate ablation products on the substrate (molecules fragments of the matrix) where condensation occurs, while the fate of most of the lightest ablation products depends on the gas flow outside the irradiated substrate. 23 Upon interaction with the material, the laserinduced shock wave undergoes inward propagation as a stress wave consisting of three distinct types of elastic waves: surface wave, longitudinal wave (compression/tension wave), and transverse wave (shear wave). The longitudinal wave is the fastest and the main wave.…”

Section: Probing Pulse Ablationmentioning

confidence: 99%

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Laser processing of carbon black reinforced ethylene‐butyl acrylate copolymer

Aboudi

Bouyahia

et al. 2023

J of Applied Polymer Sci

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Interest in the phenomenon of laser ablation (LA) has gained significant attention in recent years due to its potential for machining, high‐precision drilling, and cutting materials, such as metals, semiconductors, and dielectrics. Here, LA of ethylene‐butyl acrylate (EBA) filled with different volume fractions (4%, 8%, and 20%) of CB particles is studied. Upon irradiation with the second harmonics (532 nm) of the nanosecond pulsed Nd:YAG laser, a structuration is evidenced at the sample surface in a restricted range of fluence and at high pulse number (PN) (500 pulses, 1 Hz). The laser‐ablated surface is analyzed by microtopography, scanning electron microscopy (SEM), and x‐ray photoelectron spectroscopy (XPS). Collectively, our data show a lowering in ablation threshold and depth for CB volume fractions larger than the conduction threshold (8%), indicating that visible radiation primarily induces photothermal effects. After redeposition of the ablation products at the surface, XPS indicates that high CB content in the EBA matrix induces high oxidation level of the composite surface. Furthermore, our results reveal that LA produces a significant proportion of amorphous carbon. Several parameters which affect heat accumulation and CB particle shielding are discussed. Such parameters include laser fluence and repetition rate, and CB content.

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Section: Resultsmentioning

confidence: 99%

Section: Probing Pulse Ablationmentioning

confidence: 99%