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Proceedings Paper

Improved fast-axial-flow CO2 laser simulation with experimental plasma parameter input
Author(s): Christophe Leys; David J. Toebaert; E. Desoppere
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Paper Abstract

A laser kinetics code is developed to simulate the performance of a dc excited fast axial flow CO2 laser module. Being a five temperature model, the simulation consists of a set of equations for the relevant vibrational mode temperatures, the intra cavity radiation intensity, and the ambient gas temperature. Input electron excitation rates are computed by solving the Boltzmann equation for a given laser mixture and corresponding reduced electrical field strength E/N (N: gas density). The latter parameter is obtained experimentally by means of floating Langmuir probes. The significant population densities of vibrationally excited states in CO2 laser discharges necessitate taking into account the effect of superelastic collisions on the electron energy distribution function (EEDF). The calculated dependence of the laser output power on discharge current and pressure is in good agreement with the experiment.

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: 10.1117/12.144591
Show Author Affiliations
Christophe Leys, Univ. Ghent (Belgium)
David J. Toebaert, Univ. Ghent (Belgium)
E. Desoppere, Univ. Ghent (Belgium)

Published in SPIE Proceedings Vol. 1810:
9th International Symposium on Gas Flow and Chemical Lasers
Costas Fotakis; Costas Kalpouzos; Theodore G. Papazoglou, Editor(s)

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