Paper
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
Author Affiliations +
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.
© (1990) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
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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KEYWORDS
Mirrors

Carbon dioxide lasers

Reflectivity

Laser beam diagnostics

Phase conjugation

Wavefronts

Four wave mixing

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