Numéro
J. Phys. IV France
Volume 01, Numéro C7, Décembre 1991
2nd International Conference
Laser M2P
Page(s) C7-159 - C7-162
DOI http://dx.doi.org/10.1051/jp4:1991742
2nd International Conference
Laser M2P

J. Phys. IV France 01 (1991) C7-159-C7-162

DOI: 10.1051/jp4:1991742

CHARACTERISTICS OF A CW AND PSEUDO PULSED YAG LASER OF 1,2 KW

K.F. BADAWI, D.F. GREVEY, H. ANDRZEJEWSKI and J.L. GUYOT

Laboratoire de Thermomécanique, I.U.T. du Creusot, 12 rue de la Fonderie, F-71200 Le Creusot, France


Abstract
The main characteristics of the beam are derived from its quality factor (or the Lagrange-Smith invariant). This parameter has been found to vary from 77 to 266 µm, as a function of the beam power, the source functionning mode (CW or pseudo-pulsed), and its transport modalities (throw an optical fiber or throw lenses and mirrors). The maximum power density delivered varies from 0,2 to 2 Mw/cm2. The size of the beam waist after the focalisation system, the depth of the field and the spatio-temporal distribution of the beam energy have also been determined. The knowledge of all these characteristics allows the user to control and reproduce the materials processing by the high power laser beam.



© EDP Sciences 1991