Results 11 to 20 of about 3,519,369 (196)

Study of fundamental parameters in hybrid laser welding [PDF]

, 2011
This thesis undertakes a study of laser welding in terms of basic laser material interaction parameters. This includes power density, interaction time and specific point energy.
Suder, Wojciech
core   +7 more sources

Possible explanations for different surface quality in laser cutting with 1 micron and 10 microns beams [PDF]

, 2012
In laser　cutting　of　thick　steel　sheets,　quality　difference　is　observed　between　cut　surfaces　obtained　with 1 micron and 10 micron laser beams. This paper investigates physical mechanisms for this interesting and important problem of the wavelength ...
Remy Fabbro, Koji Hirano, FABBRO, Rémy, HIRANO, Koji   +3 more
core   +1 more source

Optical trapping with superfocused high-M2 laser diode beam [PDF]

, 2015
Many applications of high-power laser diodes demand tight focusing. This is often not possible due to the multimode nature of semiconductor laser radiation possessing beam propagation parameter M2 values in double-digits.
Kuchinskii, V. I., S. N. Loseva, Deryagin, A. G., M. Farsarib, Soboleva, K.K., V. V. Dudelev, W. Sibbett, Rafailov, E. U., Dudelev, V. V., Melissinaki, V., Deryagin, A.G., V. V. Dudeleva, Sobolev, K. K., K. K. Soboleva, V. Melissinaki, Kuchinskii, V.I., A. G. Deryagin, V. I. Kuchinskiia, Rafailov, E.U., G. S. Sokolovskii, Losev, S.N., A. G. Deryagina, V. I. Kuchinskii, M. Farsari, K. K. Sobolevac, Sokolovskii, G.S., V. Melissinakib, W. Sibbette, G. S. Sokolovskiia, Sokolovskii, G. S., Dudelev, V.V., E. U. Rafailov, Farsari, M., Losev, S. N., Sibbett, W., E. U. Rafailovf, S. N. Losev   +36 more
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Analysis of hybrid Nd:Yag laser-MAG arc welding processes. [PDF]

, 2011
In the hybrid laser-arc welding process, a laser beam and an electric arc are coupled in order to combine the advantages of both processes: high welding speed, low thermal load and high depth penetration thanks to the laser; less demanding on joint ...
F. Coste, E. Le Guen, P. Le Masson, COSTE, Frédéric, LE MASSON, Philippe, M. Carin, LE GUEN, Emilie, FABBRO, Rémy, CARIN, Muriel, R. Fabbro   +9 more
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Measurement of laser absorptivity for operating parameters characteristic of laser drilling regime [PDF]

, 2008
Publisher version : http://iopscience.iop.org/0022-3727/41/15/155502/Laser drilling in the percussion regime is commonly used in the aircraft industry to drill sub-millimetre holes in metallic targets.
SCHNEIDER, Matthieu, BERTHE, Laurent, FABBRO, Rémy, MULLER, Maryse   +3 more
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Characterization of Laser Beam Shaping Optics Based on Their Ablation Geometry of Thin Films

Micromachines, 2014
Thin film ablation with pulsed nanosecond lasers can benefit from the use of beam shaping optics to transform the Gaussian beam profile with a circular footprint into a Top-Hat beam profile with a rectangular footprint.
Stefan Rung, Johannes Barth, Ralf Hellmann   +2 more
doaj   +1 more source

Spatially Structured Optical Pump for Laser Generation Tuning

Nanomaterials, 2023
The goal and essential parameter of laser light conversion is achieving emitted radiation of higher brightness. For many applications, the laser beam must have the highest available beam quality and highest achievable power.
Gabrielius Kontenis, Darius Gailevicius, Victor Taranenko, Kestutis Staliunas   +3 more
doaj   +1 more source

Pepper-pot emittance measurement of laser-plasma wakefield accelerated electrons [PDF]

, 2009
The transverse emittance is an important parameter governing the brightness of an electron beam. Here we present the first pepper-pot measurement of the transverse emittance for a mono-energetic electron beam from a laser-plasma wakefield accelerator ...
Shanks, R. P., Welsh, G. H., Cipiccia, S., Anania, M. P., Vieux, G., Gallacher, J. G., Islam, M. R., Ersfeld, B., Issac, R. C., Wiggins, S. M., Jaroszynski, D. A., Brunetti, E.   +11 more
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Study the distribution of photovoltaic power and cross section in laser spot light [PDF]

مجلة التربية والعلم, 2007
This article presents the use of image processing technique to study the effect of injection current on the optical power distribution and laser spot cross-section (profile) of semiconductor laser type (AlGaInP).
Ragheed Ibraheem
doaj   +1 more source

Relativistic self-focusing of intense laser beam in thermal collisionless quantum plasma with ramped density profile

Physical Review Special Topics. Accelerators and Beams, 2015
Propagation of a Gaussian x-ray laser beam has been analyzed in collisionless thermal quantum plasma with considering a ramped density profile. In this density profile due to the increase in the plasma density, an earlier and stronger self-focusing ...
S. Zare, E. Yazdani, S. Rezaee, A. Anvari, R. Sadighi-Bonabi   +4 more
doaj   +1 more source