Improved fast-axial-flow CO2 laser simulation with experimental plasma parameter input

Christophe Leys; David J. Toebaert; E. Desoppere

doi:10.1117/12.144591

4 May 1993 Improved fast-axial-flow CO2 laser simulation with experimental plasma parameter input

Christophe Leys, David J. Toebaert, E. Desoppere

Proceedings Volume 1810, 9th International Symposium on Gas Flow and Chemical Lasers; (1993) https://doi.org/10.1117/12.144591
Event: Ninth International Symposium on Gas Flow and Chemical Lasers, 1992, Heraklion, Greece

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.

Citation Download Citation

Christophe Leys, David J. Toebaert, and E. Desoppere "Improved fast-axial-flow CO2 laser simulation with experimental plasma parameter input", Proc. SPIE 1810, 9th International Symposium on Gas Flow and Chemical Lasers, (4 May 1993); https://doi.org/10.1117/12.144591

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