Theoretical investigation of properties of filament pumped by Gaussian and super-Gaussian beams at relative low incident power

A theoretical investigation on the propagation properties of Hollow Gaussian beams passing through turbulent biological tissues

Optik ◽

10.1016/j.ijleo.2017.05.054 ◽

2017 ◽

Vol 141 ◽

pp. 72-82 ◽

Cited By ~ 5

Author(s):

Faroq Saad ◽

Abdelmajid Belafhal

Keyword(s):

Theoretical Investigation ◽

Biological Tissues ◽

Gaussian Beams ◽

Propagation Properties

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Theoretical investigation on the Hollow Gaussian beams propagating in atmospheric turbulent

Chinese Journal of Physics ◽

10.1016/j.cjph.2016.04.004 ◽

2016 ◽

Vol 54 (2) ◽

pp. 194-204 ◽

Cited By ~ 5

Author(s):

F. Khannous ◽

M. Boustimi ◽

H. Nebdi ◽

A. Belafhal

Keyword(s):

Theoretical Investigation ◽

Gaussian Beams

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Theoretical investigation of vortex Gaussian beams focusing along the axis of the crystal

VESTNIK of the Samara State Aerospace University ◽

10.18287/1998-6629-2015-14-1-190-206 ◽

2015 ◽

Vol 14 (1) ◽

pp. 190

Author(s):

S. N. Khonina ◽

S. G. Volotovsky ◽

A. V. Ustinov ◽

A. P. Krasnov

Keyword(s):

Theoretical Investigation ◽

Gaussian Beams

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Microstructures of Laser Processed Fe-Cr Surface Alloys

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100098150 ◽

1981 ◽

Vol 39 ◽

pp. 328-329

Author(s):

P. A. Molian ◽

K. H. Khan ◽

W. E. Wood

Keyword(s):

Cooling Rate ◽

Pure Iron ◽

Continuous Wave ◽

Laser Surface ◽

Material Surface ◽

Constitution Diagram ◽

Incident Power ◽

Surface Alloying ◽

Laser Surface Alloying ◽

Spot Diameter

In recent years, the effects of chromium on the transformation characteristics of pure iron and the structures produced thereby have been extensively studied as a function of cooling rate. In this paper, we present TEM observations made on specimens of Fe-10% Cr and Fe-20% Cr alloys produced through laser surface alloying process with an estimated cooling rate of 8.8 x 104°C/sec. These two chromium levels were selected in order to study their phase transformation characteristics which are dissimilar in the two cases as predicted by the constitution diagram. Pure iron (C<0.01%, Si<0.01%, Mn<0.01%, S=0.003%, P=0.008%) was electrodeposited with chromium to the thicknesses of 40 and 70μm and then vacuum degassed at 400°F to remove the hydrogen formed during electroplating. Laser surface alloying of chromium into the iron substrate was then performed employing a continuous wave CO2 laser operated at an incident power of 1200 watts. The laser beam, defocussed to a spot diameter of 0.25mm, scanned the material surface at a rate of 30mm/sec, (70 ipm).

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