Fiber transmission of high-power laser pulses for laser shock processing

2000 ◽  
Author(s):  
T. Schmidt-Uhlig ◽  
G. Marowsky ◽  
M. Yoda ◽  
Y. Sano
Keyword(s):  
High Power ◽  
Laser Pulses ◽  
Laser Shock ◽  
High Power Laser ◽  
Power Laser ◽  
Laser Shock Processing ◽  
Shock Processing ◽  
Fiber Transmission

Laser shock processing with 20 MW laser pulses delivered by optical fibers

2000 ◽  
Vol 9 (3) ◽  
pp. 235-238 ◽  
Author(s):  
T. Schmidt-Uhlig ◽  
P. Karlitschek ◽  
M. Yoda ◽  
Y. Sano ◽  
G. Marowsky
Keyword(s):  
Optical Fibers ◽  
Laser Pulses ◽  
Laser Shock ◽  
Laser Shock Processing ◽  
Shock Processing

Laser Shock Processing of Ni-Base Superalloy and High Cycle Fatigue Properties

2011 ◽  
Vol 697-698 ◽  
pp. 235-238 ◽  
Author(s):  
L. Zhou ◽  
Y.H. Li ◽  
W.F. He ◽  
X.D. Wang ◽  
Q.P. Li
Keyword(s):  
High Cycle Fatigue ◽  
Laser Pulses ◽  
Fatigue Properties ◽  
Treatment Technique ◽  
Cycle Fatigue ◽  
Laser Shock ◽  
Laser Shock Processing ◽  
First Order ◽  
Shock Processing ◽  
Base Superalloy

A plasma sound wave detection method of laser shock processing (LSP) technology is proposed. Speciments of Ni-base superalloy are used in this paper. A convergent lens is used to deliver 1.2 J, 10 ns laser pulses by a Q-switch Nd:YAG laser, operating at 1 Hz. The influence of the laser density to the shock wave is investigated in detail for two different wavelength lasers. Constant amplitude fatigue data are generated in room environment using notch specimens tested at an amplitude of vibration 2.8 mm and first-order flextensional mode. The results show that LSP is an effective surface treatment technique for improving the high cycle fatigue performance of Ni-base superalloys having a factor of 1.62 improvement in fatigue life.

Characterisation of supersonic gas jets for different nozzle geometries for laser-plasma acceleration experiments at SPARC_LAB

2022 ◽  
Vol 17 (01) ◽  
pp. C01049
Author(s):  
G. Costa ◽  
M.P. Anania ◽  
A. Biagioni ◽  
F.G. Bisesto ◽  
M. Del Franco ◽  
...  
Keyword(s):  
High Power ◽  
Plasma Channel ◽  
Laser Pulses ◽  
Industrial Applications ◽  
Point Of View ◽  
Theoretical Point ◽  
High Power Laser ◽  
Power Laser ◽  
Neutral Gas ◽  
Nozzle Geometries

Abstract Plasma-based technology promises a tremendous reduction in size of accelerators used for research, medical, and industrial applications, making it possible to develop tabletop machines accessible for a broader scientific community. The use of high-power laser pulses on gaseous targets is a promising method for the generation of accelerated electron beams at energies on the GeV scale, in extremely small sizes, typically millimetres. The gaseous target in question can be a collimated supersonic gasjet from a nozzle. In this work, a technique for optimising the so generated plasma channel is presented. In detail, a study on the influence of the nozzle throat shape in relation to the uniformity and density of the generated plasma profile is reported. These considerations are discussed first of all from a theoretical point of view, by means of a stationary one-dimensional mathematical model of the neutral gas, thus exploiting the possibility of comparing the properties of the output flow for different nozzle geometries. This is combined with an experimental approach using interferometric longitudinal density measurements of the plasma channel. The latter is generated by a high-power laser pulse focused on a helium gasjet, in the SPARC_LAB laboratories.

Interference lithography processes with high-power laser pulses

2009 ◽  
Author(s):  
A. Rodriguez ◽  
M. Ellman ◽  
I. Ayerdi ◽  
N. Perez ◽  
S. M. Olaizola ◽  
...  
Keyword(s):  
High Power ◽  
Laser Pulses ◽  
Interference Lithography ◽  
High Power Laser ◽  
Power Laser

Ti:Al 2 O 3 laser with high-power laser pulses in wide tuning range

1993 ◽  
Author(s):  
Zdzislaw Jankiewicz ◽  
Jerzy Szydlak ◽  
Waldemar Zendzian
Keyword(s):  
High Power ◽  
Tuning Range ◽  
Laser Pulses ◽  
High Power Laser ◽  
Wide Tuning Range ◽  
Power Laser

Characteristics of quasi-unipolar electromagnetic pulses formed in the interaction of high-power laser pulses with nanoscale targets

2019 ◽  
Vol 49 (8) ◽  
pp. 788-795
Author(s):  
V V Kulagin ◽  
V N Kornienko ◽  
V A Cherepenin ◽  
D N Gupta ◽  
H Suk
Keyword(s):  
High Power ◽  
Laser Pulses ◽  
High Power Laser ◽  
Power Laser ◽  
Electromagnetic Pulses
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