Effects of buffer gas on spectra of optically pumped far-infrared cavity laser

By developing a mechanism model of buffer gas, the comprehensive relaxation time of laser operation substance was calculated. By means of solving the density matrix equations, the effects of buffer gas N-2 on the spectrum cha racteristics of NH3 FIR laser line with buffer gas N-2 were studied. It was found that by adding proper buffer gas, FIR laser output pourer could be i ncreased, and spectra widened because of the molecular collision. This work made it possible to develop high output and wide range tunable FIRL.