Degenerate four-photon parametric interactions (DFPI) in optically pumped CH3F laser

Conclusion The results of the investigation make it possible to draw a conclusion that the DFPI processes do not influence significantly the spectral composition and the energy values of the output FIR emission in a superradiant CH₃F laser. They are determined in fact by the Raman processes. But anyway the DFPI processes are of great importance for the MIR emission generation and lead to the appearance of a large number of intensive MIR lines in the IR wavelength range.