Damage threshold of fused silica

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August undefined, 2024

WebDec 1, 2015 · Laser damage to fused silica continues a main issue of high-power/energy laser systems. HF-based etching technique is known to mitigate laser damage initiation and growth under UV laser illumination. ... As a result, improving the laser-induced damage threshold (LIDT) of fused silica optics contributes to the enhancement of the overall ... Weba dielectric material, e.g., fused silica, using short pulses ranging from 7 to 300 fs. The relevant numerical criteria of damage and ablation thresholds are proposed consistently …

Damage to fused silica windows while under simultaneous …

WebThe essential results of a carefully controlled experimental investigation of the effect of roughness on laser-induced surface damage thresholds in fused silica are reported. Sets of fused silica samples were subjected to several surface preparations such that rms surface roughness values within each set varied over two orders of magnitude. A plot of … WebFor various applications, one needs to select optical components with a sufficiently high optical damage threshold (LIDT). On the other hand, ... “Femtosecond laser modification of fused silica: the effect of writing … side effects of a kidney stone

Layer by layer exposure of subsurface defects and laser-induced damage ...

WebThe essential results of a carefully controlled experimental investigation of the effect of roughness on laser-induced surface damage thresholds in fused silica are reported. … WebDec 22, 1998 · A study was conducted to understand the effects of etch depth on the damage threshold of fused silica substrates. The study used a 355 nm, 7.5 ns, 10 Hz Nd:YAG laser to damage test fused silica optics through various wet etch processing steps. Inspection of the surface quality was performed with Nomarski microscopy and … WebDec 3, 1996 · The silica windows were then illuminated repetitively using a 3-ns, 355 nm and an 8.6-ns, 1064 nm laser. The tests were conducted at near normal incidence with particles on input and output surfaces of the windows. During the first shot, a plasma ignited at the metal particle and damage initiated on the fused silica surface. the pinkun forum

Carbon dioxide laser polishing of fused silica surfaces for …

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WebWe discuss the action of ultrashort Bessel laser beams in bulk fused silica, emphasizing excitation dynamics with energy localization beyond … WebMay 20, 2013 · Subsurface defects of fused silica optics and laser induced damage at 351 nm. Many kinds of subsurface defects are always present together in the subsurface of … the pink umbrellaWebAug 11, 1999 · Single- and multiple-shot damage thresholds and plasma-emission thresholds for fused silica and CaF2 are reported for 790 nm photons as a function of laser pulse width (190 fs – 4.5 ps). The results … Expand the pink umbrella book

"WebJun 1, 2010 · A study was conducted to understand the effects of etch depth on the damage threshold of fused silica substrates. The study used a 355 nm, 7.5 ns, 10 Hz Nd:YAG laser to damage test fused silica ... " - Damage threshold of fused silica

Damage threshold of fused silica

Subsurface defects of fused silica optics and laser induced ... - PubM…

WebFeb 23, 2010 · @article{osti_1010834, title = {HF-based etching processes for improving laser damage resistance of fused silica optical surfaces}, author = {Suratwala, T I and Miller, P E and Bude, J D and Steele, R A and Shen, N and Monticelli, M V and Feit, M D and Laurence, T A and Norton, M A and Carr, C W and Wong, L L}, abstractNote = {The … WebJul 1, 2024 · The damage threshold of the gold film on fused silica was 0.64 J/cm 2, with the typical damage morphology of thermal ablation and melting; the damage threshold of the gold film on photoresist was 0.30 J/cm 2, with the typical damage morphology of blisters or peeling off. In order to better understand the impact of the substrate on the ...

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WebJun 21, 2010 · The statistical damage thresholds of three kinds of common scratches are obtained through raster scanning at different laser fluences. The results show that the … WebSun Laxi found that RIE technology could significantly improve the laser induced damage threshold (LIDT) of fused silica optics . Under the conditions of 355 nm wavelength and a single longitudinal mode with about 3 ns (full wave at half maximum, FWHM), the 0 probability damage threshold could reach to 7.5 J/cm 2 after the RIE process. J.

WebJun 23, 2024 · Laser-induced damage threshold is the main limitation for fused silica optics in high-power laser applications. The existence of various defects near the surface … WebJan 14, 2024 · Co2+:MgAl2O4 crystals are successfully used as passive Q-switches within the cavity of erbium glass lasers. Their limited resistance to laser radiation might also put constraints on the generated output peak power. Usually, polishing of optical substrates induces a contaminated Beilby layer and damages the subsurface layer, which leads to a …

WebOct 27, 2024 · Damage threshold specifications are constant for all UV fused silica lenses, regardless of the size of the lens. Laser Induced Damage Threshold Tutorial The following is a general overview of how … WebAug 3, 2016 · The laser damage precursors in subsurface of fused silica (e.g. photosensitive impurities, scratches and redeposited silica compounds) were mitigated …

WebApr 30, 2024 · This study discussed the ablation thresholds of picosecond laser dual pulses in fused silica with different temporal separations. The results indicate that the lowest damage threshold of the dual-pulse ablation is at a temporal separation of 100 ps, which is only half of the threshold of the conventional pulse ablation. Furthermore, the …

WebFor example, fused silica does not seem to demonstrate any correlation between the number of shots and bulk damage threshold. 8 It is useful … the pinkuriWebMay 20, 2013 · The results show that Cerium element and SSD both have a good correlation with laser-induced damage thresholds and damage density. Research results evaluate process technology of fused silica optics in China at present. Furthermore, the results can provide technique support for improving laser induced damage performance … side effects of albriozaWebMay 1, 2008 · Sandia researcher Arlee Smith and colleagues measured optical damage thresholds of bulk fused silica at 1064 nm for 8 ns pulses from a single-mode Q -switched laser and 14 ps pulses from a mode-locked Q -switched laser focused to 7.5 mm spots … side effects of alahistWebMar 1, 2024 · We present and investigate a hybrid laser-based method of surface shaping for damage mitigation on fused silica surfaces. Damage sites were removed and precisely shaped into an optically-benign ... the pinkun norwichWebMar 31, 2024 · In this work, effects of 10 keV argon ion implantation on laser-induced damage threshold (LIDT) of fused silica were systematically investigated with ion fluences ranged from 1 × 10 16 ions/cm 2 to 1 × 10 18 ions/cm 2.Results show that only when the ion fluence increases above 1 × 10 17 ions/cm 2, the surface roughness apparently … side effects of albon in catsWebApr 3, 2002 · In both cases, fused silica served as the substrate. For a fixed number of 1000 laser pulses per spot, a decrease in the damage threshold fluence of the mirror by a factor of two was observed by changing the repetition rate from 10 Hz to 1 kHz. A single 500-nm Ta 2 O 5 film shows higher damage resistance compared to the mirror. the pink valise boutiqueWebThe thresholds are sharp and reproducible. For the 8 ns pulses the bulk threshold irradiance is 4.75 ± 0.25 kW/μm2. The threshold is approximately three times higher for … side effects of a iud