Analysis of subsonic COIL performance with a magnetic modulation

Jaroslav Beránek; Karel Rohlena

doi:10.1117/12.816668

17 April 2009 Analysis of subsonic COIL performance with a magnetic modulation

Jaroslav Beránek, Karel Rohlena

Proceedings Volume 7131, XVII International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers; 713104 (2009) https://doi.org/10.1117/12.816668
Event: XVII International Symposium on Gas Flow and Chemical Lasers and High Power Lasers, 2008, Lisboa, Portugal

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.

Citation Download Citation

Jaroslav Beránek and Karel Rohlena "Analysis of subsonic COIL performance with a magnetic modulation", Proc. SPIE 7131, XVII International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers, 713104 (17 April 2009); https://doi.org/10.1117/12.816668

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