Optika Atmosfery i Okeana Journal

Vol. 12, issue 05, article # 18

Geiko P. P., Gusamov A. I., Petrov V. M., Andreev Yu. M. Conversion of CO₂ laser radiation into far IR spectral range with a ZnGeP₂ crystal. // Atmospheric and oceanic optics. 1999. V. 12. No. 05. P. 458-460. PDF
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Abstract:

All possibilities of CO₂ laser frequency conversion into the far infrared (FIR) and super-high frequency (SHF) ranges have been analyzed on the basis of systematized data on linear optical properties of ZnGeP₂ single crystals for the first time. The coefficients of dispersion Sellmeier equations for FIR range have been determined. Phase-matching curves and phase-matching angular widths for both direct and backward waves have been calculated. A principle possibility of applying the emission converted to control HF, NH₃, HCl, HOCl, OH, and HBr content in gas mixtures is shown.