
doi: 10.1063/1.92080
Laser emission on the conventional 12.8-μm NH3 laser transition, optically pumped by the CO2 9R16 line, can be completely quenched and replaced by emission at 12.2μm. Cascading far-infrared laser transitions in the excited ammonia ν2 state are shown to be responsible for the shift in wavelength.
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