Laser induced damage of sapphire and titanium doped sapphire crystals under femtosecond to nanosecond laser irradiation

2009 ◽  
Author(s):  
B. Bussière ◽  
O. Utéza ◽  
N. Sanner ◽  
M. Sentis ◽  
G. Riboulet ◽  
...  
Keyword(s):  
Laser Irradiation ◽  
Nanosecond Laser ◽  
Laser Induced Damage

Laser-induced damage threshold of silicon under combined millisecond and nanosecond laser irradiation

2017 ◽  
Vol 121 (11) ◽  
pp. 113102 ◽  
Author(s):  
Xueming Lv ◽  
Yunxiang Pan ◽  
Zhichao Jia ◽  
Zewen Li ◽  
Hongchao Zhang ◽  
...  
Keyword(s):  
Laser Irradiation ◽  
Damage Threshold ◽  
Nanosecond Laser ◽  
Laser Induced Damage

Growth of laser-induced damage in fused silica under nanosecond laser irradiation

2012 ◽  
Vol 24 (5) ◽  
pp. 1057-1062 ◽  
Author(s):  
邱荣 Qiu Rong ◽  
王俊波 Wang Junbo ◽  
任欢 Ren Huan ◽  
李晓红 Li Xiaohong ◽  
施鹏程 Shi Pengcheng ◽  
...  
Keyword(s):  
Laser Irradiation ◽  
Fused Silica ◽  
Nanosecond Laser ◽  
Laser Induced Damage

Laser-induced fabrication of porous gold nanoshells

Nanoscale ◽  
2018 ◽  
Vol 10 (43) ◽  
pp. 20108-20112 ◽  
Author(s):  
Tae-Hyeon Park ◽  
Du-Jeon Jang
Keyword(s):  
Raman Scattering ◽  
Laser Irradiation ◽  
High Surface ◽  
Gold Nanoshells ◽  
Nanosecond Laser ◽  
Scattering Efficiency ◽  
Porous Gold ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering

Hollow and porous gold nanoshells with high surface-enhanced Raman scattering efficiency have been fabricated through utilizing nanosecond laser irradiation.

scholarly journals Er:YAG laser-induced damage to a dental composite in simulated clinical scenarios for inadvertent irradiation: an in vitro study

2021 ◽  
Author(s):  
Katharina Kuhn ◽  
Carmen U. Schmid ◽  
Ralph G. Luthardt ◽  
Heike Rudolph ◽  
Rolf Diebolder
Keyword(s):  
Laser Irradiation ◽  
Laser Fluence ◽  
Ablation Threshold ◽  
Er:Yag Laser ◽  
In Vitro Study ◽  
Vitro Study ◽  
Crater Diameter ◽  
Clinical Scenarios ◽  
Laser Induced Damage

AbstractInadvertent Er:YAG laser irradiation occurs in dentistry and may harm restorative materials in teeth. The aim of this in vitro study was to quantify Er:YAG laser-induced damage to a nanohybrid composite in simulated clinical scenarios for inadvertent direct and indirect (reflection) laser irradiation. The simulation was performed by varying the output energy (OE;direct˃indirect) reaching the specimen and the operating distance (OD;direct˂indirect). Composite specimens were irradiated by an Er:YAG laser. The ablation threshold was determined and clinically relevant parameters were applied (n = 6 for each OE/OD combination) for direct (OE: 570 mJ/OD: 10 mm, OE: 190 mJ/OD: 10 mm) and indirect irradiation (OE: 466 mJ/OD: 15 mm, OE: 57 mJ/OD: 15 mm, OE: 155 mJ/OD: 15 mm, OE: 19 mJ/OD: 15 mm). The extent of damage in the form of craters was evaluated using a laser scanning microscope (LSM) and a conventional light microscope (LM). The ablation threshold was determined to be 2.6 J/cm2. The crater diameter showed the highest value (LM: 1075 ± 18 µm/LSM: 1082 ± 17 µm) for indirect irradiation (reflectant:dental mirror) (OE: 466 mJ/OD: 15 mm). The crater depth showed the highest and comparable value for direct (OE: 570 mJ/OD: 10 mm; LSM: 89 ± 2 µm) and indirect irradiation (OE: 466 mJ/OD: 15 mm; LSM: 90 ± 4 µm). For each OD, the crater diameter, depth, and volume increased with higher laser fluence. However, the OD—and thus the laser spot diameter—also had an enlarging effect. Thus, indirect irradiation (reflectant:dental mirror) with only 47% of the laser fluence of direct irradiation led to a larger diameter and a comparable depth. The three-dimensional extent of the crater was large enough to cause roughening, which may lead to plaque accumulation and encourage caries, gingivitis, and periodontitis under clinical conditions. Clinicians should be aware that reflected irradiation can still create such craters.

Experimental study on characteristics of nanosecond laser-induced damage on optical elements

2014 ◽  
Vol 12 (s2) ◽  
pp. S21409-321414
Author(s):  
Xianhua Yin Xianhua Yin ◽  
Yifei Zhuang Yifei Zhuang ◽  
Yan Zhang Yan Zhang ◽  
Guowen Zhang Guowen Zhang ◽  
Xingqiang Lu Xingqiang Lu ◽  
...  
Keyword(s):  
Experimental Study ◽  
Nanosecond Laser ◽  
Optical Elements ◽  
Laser Induced Damage

Fabrication of Magnetic α-Fe2O3/Fe3O4 Composite Particles by Nanosecond Laser Irradiation of α-Fe2O3 Powder in Water

2020 ◽  
Vol 49 (4) ◽  
pp. 413-415
Author(s):  
Ryo Kihara ◽  
Akari Shigetaka ◽  
Tsubasa Isshiki ◽  
Hiroyuki Wada ◽  
Saeki Yamamuro ◽  
...  
Keyword(s):  
Laser Irradiation ◽  
Composite Particles ◽  
Nanosecond Laser

scholarly journals The Effect of Pulsed Nanosecond Laser Irradiation on the Corrosion Resistance of Mg–Al–Zn Magnesium Alloy

2020 ◽  
Vol 11 (3) ◽  
pp. 547-551
Author(s):  
S. A. Bozhko ◽  
S. S. Manokhin ◽  
A. Yu. Tokmacheva-Kolobova ◽  
Yu. Yu. Karlagina ◽  
A. E. Ligachev
Keyword(s):  
Corrosion Resistance ◽  
Magnesium Alloy ◽  
Laser Irradiation ◽  
Nanosecond Laser
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