scholarly journals Enhancement of laser material drilling using high-impulse multi-laser melt ejection

2019 ◽  
Vol 27 (14) ◽  
pp. 19864 ◽  
Author(s):  
Nan Shen ◽  
Jeff D. Bude ◽  
Sonny Ly ◽  
Wesley J. Keller ◽  
Alexander M. Rubenchik ◽  
...  
Keyword(s):  
Laser Material ◽  
Melt Ejection

Intelligent, low-cost system for fume control during laser material processing

2005 ◽  
Author(s):  
Ramin Sattari ◽  
Stephan Barcikowski ◽  
Thomas Püster ◽  
Andreas Ostendorf ◽  
Heinz Haferkamp
Keyword(s):  
Material Processing ◽  
Low Cost ◽  
Laser Material Processing ◽  
Laser Material ◽  
Cost System

Particle velocity measurement in powder gas jets of coaxial powder nozzles for laser material deposition

2021 ◽  
Vol 33 (1) ◽  
pp. 012019
Author(s):  
Jonathan Schaible ◽  
Luis Andrea Hau ◽  
David Weber ◽  
Thomas Schopphoven ◽  
Constantin Häfner ◽  
...  
Keyword(s):  
Particle Velocity ◽  
Velocity Measurement ◽  
Laser Material ◽  
Gas Jets ◽  
Material Deposition ◽  
Particle Velocity Measurement

High speed videography of microvia formation and melt ejection

2002 ◽  
Author(s):  
Francisco Villarreal ◽  
Kiran Gulia ◽  
Howard J. Baker ◽  
Duncan P. Hand ◽  
Denis R. Hall
Keyword(s):  
High Speed ◽  
Melt Ejection

scholarly journals Simulation of the laser-material interaction of ultrashort pulse laser processing of silicon nitride workpieces and the key factors in the ablation process

2021 ◽  
Author(s):  
Babak Soltani ◽  
Faramarz Hojati ◽  
Amir Daneshi ◽  
Bahman Azarhoushang
Keyword(s):  
Mathematical Model ◽  
Laser Ablation ◽  
Pulse Laser ◽  
Ultrashort Pulse ◽  
Laser Processing ◽  
Laser Power ◽  
Removal Rate ◽  
Ultrashort Pulse Laser ◽  
Laser Material ◽  
Material Interaction

AbstractUnderstanding the laser ablation mechanism is highly essential to find the effect of different laser parameters on the quality of the laser ablation. A mathematical model was developed in the current investigation to calculate the material removal rate and ablation depth. Laser cuts were created on the workpiece with different laser scan speeds from 1 to 10 mm s−1 by an ultrashort pulse laser with a wavelength of about 1000 nm. The calculated depths of laser cuts were validated via practical experiments. The variation of the laser power intensity on the workpiece’s surface during laser radiation was also calculated. The mathematical model has determined the laser-material interaction mechanism for different laser intensities. The practical sublimation temperature and ablated material temperature during laser processing are other data that the model calculates. The results show that in laser power intensities (IL) higher than 1.5 × 109 W cm−2, the laser-material interaction is multiphoton ionisation with no effects of thermal reaction, while in lower values of IL, there are effects of thermal damages and HAZ adjacent to the laser cut. The angle of incidence is an essential factor in altering incident IL on the surface of the workpiece during laser processing, which changes with increasing depth of the laser cut.

Properties of 1.3 μm InGaNAs laser material grown by MBE using a N2/Ar RF plasma

2003 ◽  
Vol 47 (3) ◽  
pp. 399-405 ◽  
Author(s):  
J.A Gupta ◽  
P.J Barrios ◽  
G.C Aers ◽  
R.L Williams ◽  
J Ramsey ◽  
...  
Keyword(s):  
Rf Plasma ◽  
Laser Material
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