Experimental study of the parameters of the laser-induced plasma observed in welding of iron targets with continuous high-power CO2 lasers

Anne Poueyo; Lilian Sabatier; G. Deshors; Remy Fabbro; Angel M. de Frutos; Dionisio Bermejo; Jose M. Orza

doi:10.1117/12.46891

1 October 1991 Experimental study of the parameters of the laser-induced plasma observed in welding of iron targets with continuous high-power CO₂ lasers

Anne Poueyo, Lilian Sabatier, G. Deshors, Remy Fabbro, Angel M. de Frutos, Dionisio Bermejo, Jose M. Orza

Author Affiliations +

Proceedings Volume 1502, Industrial and Scientific Uses of High-Power Lasers; (1991) https://doi.org/10.1117/12.46891
Event: ECO4 (The Hague '91), 1991, The Hague, Netherlands

Abstract

It is well known that the metallic plasmas observed in laser welding are of great importance for the processes of absorption and energy transport to the target. The microscopic parameters of this plasma, which are the electronic temperature and plasma density, have been studied using spectroscopic measurements. Typical temperatures of 6000 - 7000 K and densities of about 1017 cm-3 were obtained. From these measurements, the transmission of the plasma plume and its refractivity could be estimated and compared to the corresponding experimental results. For the absorption measurements, an integrating sphere has been used. It was observed that the absorption coefficient is closely correlated to the spatial and temporal behavior of the plasma and the effect of refraction is of primary importance for laser processing when using gases other then helium at high laser intensity.

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Anne Poueyo, Lilian Sabatier, G. Deshors, Remy Fabbro, Angel M. de Frutos, Dionisio Bermejo, and Jose M. Orza "Experimental study of the parameters of the laser-induced plasma observed in welding of iron targets with continuous high-power CO₂ lasers", Proc. SPIE 1502, Industrial and Scientific Uses of High-Power Lasers, (1 October 1991); https://doi.org/10.1117/12.46891

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