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Proceedings Paper

Amplifying medium behavior of an AC-excited high-power CO2 laser
Author(s): Emmanuel Clavier; Michel E. Gastaud; Henri Brunet
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Paper Abstract

In order to achieve a compact industrial fast axial flow CO2 laser delivering an output power of a few kilowatts with a high beam quality, the authors have investigated the behavior of an amplifying medium excited by an ac discharge also called `silent discharge.' The external electrodes discharge tube and this ac power supply have been developed. The power supply was working in a resonant mode within a frequency range of 95 kHz to 125 kHz and showed that the power transmitted to the load can be modulated by frequency modulation. The dependence of the capacitive coupling between the power source and the discharge load on the electrode geometry are studied. The dependence of the gas temperature on the electrical characteristics of the source such as voltage, current, phase, and injected power are displayed. In this paper we show that for a gas temperature of 200 degree(s)C the maximum input power density was limited to 11 W/cm3. In an attempt at a laser application, an efficiency of over 15% was obtained with a laser output power of 800 W for an electric power of 4,800 W.

Paper Details

Date Published: 4 May 1993
PDF: 4 pages
Proc. SPIE 1810, 9th International Symposium on Gas Flow and Chemical Lasers, (4 May 1993); doi: 10.1117/12.144613
Show Author Affiliations
Emmanuel Clavier, Ecole Superieure d'Ingenieurs de Marseille (France)
Michel E. Gastaud, Institut Mediterraneen de Technologie (France)
Henri Brunet, Laserdot (France)


Published in SPIE Proceedings Vol. 1810:
9th International Symposium on Gas Flow and Chemical Lasers

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