Abstract
To obtain laser oscillations from easily dissociative molecules on discharge excitation, a transverse-flow FIR laser tube was designed and constructed. A flowing gas region of about 35cm long is located inside a 50cm F-P resonator in this tube. Infrared-active formaldehyde as a sample gas, laser oscillation was observed at the wavelength of 122.8±0.2 μm under the conditions of the flow speed from 0.2 to 1.0 m/sec and the pressure from 0.4 to 2.8 Torr. Peak voltage from 1.8 to 5.9 kV was applied with the etition of 8.5 Hz.
