Ultrafast laser machining of porcine sclera

2015 ◽  
Author(s):  
W. S. Góra ◽  
R. M. Carter ◽  
B. Dhillon ◽  
D. P. Hand ◽  
J. D. Shephard
Keyword(s):  
Ultrafast Laser ◽  
Laser Machining

Ultrafast laser machining: process optimization and applications

2021 ◽  
Author(s):  
Norman Hodgson ◽  
Albrecht Steinkopff ◽  
Sebastian Heming ◽  
Hortense Allegre ◽  
Hatim Haloui ◽  
...  
Keyword(s):  
Process Optimization ◽  
Ultrafast Laser ◽  
Machining Process ◽  
Laser Machining

Ultrafast laser machining of tapered microchannels in glass and PDMS

2012 ◽  
Vol 50 (2) ◽  
pp. 210-214 ◽  
Author(s):  
Samira Darvishi ◽  
Thomas Cubaud ◽  
Jon P. Longtin
Keyword(s):  
Ultrafast Laser ◽  
Laser Machining

scholarly journals Polarization Dependence of Area Scanning Ultrafast Laser Machining

2012 ◽  
Author(s):  
Mindaugas Gecevičius ◽  
Martynas Beresna ◽  
Jingyu Zhang ◽  
Peter G. Kazansky
Keyword(s):  
Ultrafast Laser ◽  
Polarization Dependence ◽  
Laser Machining

Molecular-dynamics study of multi-pulsed ultrafast laser interaction with copper

2021 ◽  
Vol 16 (4) ◽  
pp. 457-472
Author(s):  
C.P. Yin ◽  
S.T. Zhang ◽  
Y.W. Dong ◽  
Q.W. Ye ◽  
Q. Li
Keyword(s):  
Molecular Dynamics ◽  
Laser Processing ◽  
Pulsed Laser ◽  
Copper Film ◽  
Temperature Curve ◽  
Ablation Depth ◽  
Ultrafast Laser ◽  
Laser Machining ◽  
Incubation Effect ◽  
Two Temperature

Ultrafast laser has an undeniable advantage in laser processing due to its extremely small pulse width and high peak energy. While the interaction of ultrafast laser and solid materials is an extremely non-equilibrium process in which the material undergoes phase transformation and even ablation in an extremely short time range. This is the coupling of the thermos elastic effect caused by the pressure wave and the superheated melting of the material lattice. To further explore the mechanism of the action of ultrafast laser and metal materials, the two-temperature model coupling with molecular dynamics method was used to simulate the interaction of the copper and laser energy. Firstly, the interaction of single-pulsed laser and copper film was reproduced, and the calculated two-temperature curve and the visualized atomic snapshots were used to investigate the influence of laser parameters on the ablation result. Then, by changing the size of the atomic system, the curve of ablation depth as a function of laser fluence was obtained. In this paper, the interaction of multi-pulsed laser and copper was calculated. Two-temperature curve and temperature contour of copper film after the irradiation of double-pulsed and multi-pulsed laser were obtained. And the factors which can make a difference to the incubation effect were analyzed. By calculating the ablation depth under the action of multi-pulsed laser, the influence of the incubation effect on ablation results was further explored. Finally, a more accurate numerical model of laser machining metal is established and verified by an ultra-short laser processing experiment, which provides a new calculation method and theoretical basis for ultra-fast laser machining of air film holes in aviation turbine blades, and has certain practical guiding significance for laser machining.

scholarly journals Single-pulse ultrafast-laser machining of high aspect nano-holes at the surface of SiO_2

2008 ◽  
Vol 16 (19) ◽  
pp. 14411 ◽  
Author(s):  
Yelena V. White ◽  
Xiaoxuan Li ◽  
Zbigniew Sikorski ◽  
Lloyd M. Davis ◽  
William Hofmeister
Keyword(s):  
Single Pulse ◽  
Ultrafast Laser ◽  
Laser Machining

scholarly journals X-ray Dose Rate and Spectral Measurements during Ultrafast Laser Machining Using a Calibrated (High-Sensitivity) Novel X-ray Detector

Materials ◽  
2021 ◽  
Vol 14 (16) ◽  
pp. 4397
Author(s):  
Philip Mosel ◽  
Pranitha Sankar ◽  
Jan Friedrich Düsing ◽  
Günter Dittmar ◽  
Thomas Püster ◽  
...  
Keyword(s):  
Dose Rate ◽  
Repetition Rate ◽  
Average Power ◽  
Radiation Shielding ◽  
Ultrafast Laser ◽  
Laser Machining ◽  
Detection Range ◽  
X Ray ◽  
Laser Parameters ◽  
Dose Rates

Ultrashort pulse laser machining is subject to increase the processing speeds by scaling average power and pulse repetition rate, accompanied with higher dose rates of X-ray emission generated during laser–matter interaction. In particular, the X-ray energy range below 10 keV is rarely studied in a quantitative approach. We present measurements with a novel calibrated X-ray detector in the detection range of 2–20 keV and show the dependence of X-ray radiation dose rates and the spectral emissions for different laser parameters from frequently used metals, alloys, and ceramics for ultrafast laser machining. Our investigations include the dose rate dependence on various laser parameters available in ultrafast laser laboratories as well as on industrial laser systems. The measured X-ray dose rates for high repetition rate lasers with different materials definitely exceed the legal limitations in the absence of radiation shielding.

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