Utilization of active media of different isotopic composition enables to expand significantly the spectral range of optically pumped FIR Raman lasers. In this work CD3F FIR emission was investigated using grating tunable TEA-CO2 laser. Experimental investigation of possibility to obtain superradiant emission on different FIR lines under relatively low pump intensities (up to 5 MW) was the main objective of this work. We used multi pass cell with total optical length of about 15 m in order to diminish the emission thresholds. The experimental conditions were analogous to /1/, where the output characteristics of 12CH3F, 13CH3F mixture FIR Raman laser were investigated. The pressure of the active media was not optimized.
V. A. Batanov, V. A. Batanov,
"CD3F FIR Raman laser using multipass cell", Proc. SPIE 1576, 16th International Conference on Infrared and Millimeter Waves, 15761J (1 October 1991); doi: 10.1117/12.2297768; https://doi.org/10.1117/12.2297768