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Proceedings Paper

Analysis of subsonic COIL performance with a magnetic modulation
Author(s): Jaroslav Beránek; Karel Rohlena
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Paper Abstract

1D subsonic COIL model with a mixing length was generalized to include the influence of a variable magnetic field on the stimulated emission cross-section. The results are compared with the measured pulse shape. Equations describing the chemical kinetics were solved taking into account together with the gas temperature also a simplified mixing model of oxygen and iodine molecules. A variable magnetic field transforms the CW regime in a pulsed operation. The advantage of the numerical procedure is a possibility to consider an arbitrary temporal dependence of the imposed magnetic field and to calculate directly the response of the laser output. The method was applied to model the experimental data measured with the subsonic version of the COIL device in the Institute of Physics, Prague, where the applied magnetic field had a saw-tooth dependence. Having achieved a reasonable agreement of our model for the CW regime with the measured dependence of the laser output, the purpose of this contribution is to confront the magnetically switched regime with the measured pulse shape.

Paper Details

Date Published: 17 April 2009
PDF: 6 pages
Proc. SPIE 7131, XVII International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers, 713104 (17 April 2009); doi: 10.1117/12.816668
Show Author Affiliations
Jaroslav Beránek, Institute of Physics (Czech Republic)
Karel Rohlena, Institute of Physics (Czech Republic)

Published in SPIE Proceedings Vol. 7131:
XVII International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers
Rui Vilar; Olinda Conde; Marta Fajardo; Luís O. Silva; Margarida Pires; Andrei Utkin, Editor(s)

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