scholarly journals Effect of laser plasma on Nd:YAG laser drilling of acrylic plate with high optical density

2022 ◽  
Vol 149 ◽  
pp. 107827
Author(s):  
Lung-Fa Wu ◽  
Ming-Jong Tsai
Keyword(s):  
Optical Density ◽  
Laser Plasma ◽  
Nd:Yag Laser ◽  
Laser Drilling ◽  
Acrylic Plate

Changes in optical density of normal vessel wall and lipid atheromatous plaque after Nd:YAG laser irradiation

1991 ◽  
Author(s):  
Hans-Joachim Schwarzmaier ◽  
Matthias P. Heintzen ◽  
Mathias Zumdick ◽  
Raimund Kaufmann ◽  
Myron L. Wolbarsht
Keyword(s):  
Laser Irradiation ◽  
Optical Density ◽  
Nd:Yag Laser ◽  
Vessel Wall ◽  
Atheromatous Plaque ◽  
Normal Vessel

The influence of different assisting gases in the Nd:YAG laser drilling of slate

1997 ◽  
Author(s):  
F. Lusquiños ◽  
J. Pou ◽  
M. Larosi ◽  
R. Soto ◽  
M. Pérez-Amor
Keyword(s):  
Nd:Yag Laser ◽  
Laser Drilling

Direct Measurement of Charge Current by Employing a Mesh Electrode in the Laser Plasma Induced by a Nd:YAG Laser (I)

2002 ◽  
Vol 56 (8) ◽  
pp. 994-999 ◽  
Author(s):  
Marincan Pardede ◽  
Hendrik Kurniawan ◽  
Tjung Jie Lie ◽  
May On Tjia ◽  
Kiichiro Kagawa
Keyword(s):  
Shock Wave ◽  
Laser Plasma ◽  
Nd:Yag Laser ◽  
Sample Surface ◽  
Electron Collision ◽  
Emission Measurement ◽  
Plasma Emission ◽  
Electron Recombination ◽  
Current Time ◽  
Charge Current

A special technique has been developed for the detection of the charge current in conjunction with emission measurement during laser plasma generation. The current detection was performed by placing a partially transmitting metal mesh electrode at a distance of 7 mm from the sample surface with the sample serving as the counter electrode. The electric field between the mesh and sample surface was set up and varied by applying a dc high voltage (0–400 V) between them. The laser plasma was generated by a Nd:YAG laser (64 mJ, 8 ns) tightly focused on a Cu sample through the mesh electrode in surrounding gas of various low pressures. Three Cu emission lines associated with different excited energy levels were detected, namely the Cu(I) 510.5 nm (3.8 eV), Cu(I) 521.8 nm (6.2 eV), and Cu(I) 427.5 nm (7.8 eV) spectral lines. The correlation between the time profile of plasma emission and that of the charge current was examined to elucidate the roles of electron recombination and electron collision processes in the excitation of Cu atoms in the plasma. The charge current time profiles obtained at various gas pressures were invariably found to exhibit spiky signal followed by a slowly decaying component, a lack of consistent correlation with the emission profile of the Cu(I) 521.8 and 510.5 nm lines, showing characteristics of the shock wave model. The result of this study has thus failed to turn up evidence for the significant roles of electron recombination and electron collision comparable to the role of the shock wave mechanism in the plasma emission process.

scholarly journals Employment of Some Parameters to Enhance Laser-Drilling of Aluminum

2005 ◽  
Vol 10 ◽  
pp. 93
Author(s):  
Oday A. Hamadi
Keyword(s):  
Electric Field ◽  
Nd:Yag Laser ◽  
Laser Energy ◽  
Low Pressure ◽  
Laser Drilling ◽  
Sample Temperature ◽  
Drilling Process ◽  
Pulsed Nd:Yag Laser ◽  
Hole Depth

In this work, some parameters affecting drilling of aluminum samples by a pulsed Nd:YAG laser were studied. These parameters are multi-pulses irradiation, controlling sample temperature, low-pressure ambient and application of electric field on the sample. Results presented in this work explained that these parameters can enhance drilling process throughout increasing hole depth in aluminum samples at the same laser energy used for irradiation. 

Nanosecond-laser plasma-mediated generation of colloidal solutions from silver films of variable thickness: Colloidal optical density versus pre-determined ablated mass

2019 ◽  
Vol 111 ◽  
pp. 75-80 ◽  
Author(s):  
Alena Alexandrovna Nastulyavichus ◽  
Sergey Ivanovich Kudryashov ◽  
Nikita Alexandrovich Smirnov ◽  
Andrey Andreevich Rudenko ◽  
Alexander Yurievich Kharin ◽  
...  
Keyword(s):  
Optical Density ◽  
Variable Thickness ◽  
Laser Plasma ◽  
Nanosecond Laser ◽  
Colloidal Solutions ◽  
Silver Films ◽  
Ablated Mass

Nd:YAG laser drilling in epoxy resin/AlN composites material

2007 ◽  
Vol 38 (9) ◽  
pp. 2055-2064 ◽  
Author(s):  
Winco K.C. Yung ◽  
Jun Wu ◽  
T.M. Yue ◽  
B.L. Zhu ◽  
C.P. Lee
Keyword(s):  
Epoxy Resin ◽  
Nd:Yag Laser ◽  
Laser Drilling

Changes in optical density after Nd:YAG laser carbonization of human vessel wall

1994 ◽  
Author(s):  
Hans-Joachim Schwarzmaier ◽  
Thomas Goldbach ◽  
Matthias P. Heintzen ◽  
Wolfram Mueller ◽  
Raimund Kaufmann
Keyword(s):  
Optical Density ◽  
Nd:Yag Laser ◽  
Vessel Wall
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