Factors affecting the efficiency in four-wave mixing of pulsed CO2 laser radiation in sulfur hexafluoride

Wolfgang Riede; Thomas Hall; Hans Hermann Klingenberg

doi:10.1117/12.20568

1 October 1990 Factors affecting the efficiency in four-wave mixing of pulsed CO2 laser radiation in sulfur hexafluoride

Wolfgang Riede, Thomas Hall, Hans Hermann Klingenberg

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Proceedings Volume 1276, CO2 Lasers and Applications II; (1990) https://doi.org/10.1117/12.20568
Event: The International Congress on Optical Science and Engineering, 1990, The Hague, Netherlands

Abstract

An investigation was made determining the parameters affecting the phase conjugate reflectivity in a four-wave mixing scheme using a pulsed TEA CO2 laser and gaseous sulfur hexafluoride (SF6) as the nonlinear medium. With a low energy CO2 laser (60 mJ pulse energy) an optimum energy reflectivity of 20 % was achieved at a pump-probe angle of 30 mrad, a SF6 pressure of 50 hPa at the lOiim P(1O) laser transition for exactly aligned counterpropagating pump waves. In addition, the reflectivity showed a substructure when enlarging the angular mismatch between the pump waves. A simulation of the phase conjugate intensity distribution was carried out solving the Kirchhoff- Fresnel integral equation.

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Wolfgang Riede, Thomas Hall, and Hans Hermann Klingenberg "Factors affecting the efficiency in four-wave mixing of pulsed CO2 laser radiation in sulfur hexafluoride", Proc. SPIE 1276, CO2 Lasers and Applications II, (1 October 1990); https://doi.org/10.1117/12.20568

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