Spectral dependences of reflection in a degenerate four-wave interaction of infrared laser radiation in resonant SF6, CF3Br, and CD4 gases

Spectral dependences of reflection in a degenerate four-wave interaction of CO₂ laser radiation in resonant SF₆, CF₃Br, and CD₄ gases were investigated with a spectral resolution of 5 X 10 ^– 2 cm ^– 1. A structure associated with one- and two-photon vibrational transitions in the gases was observed in the spectra. High reflection coefficients (of some tens of percent) were achieved by optimizing the phase conjugation conditions whilst maintaining the resonant character of the reflection.