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

摘要

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 characteristics of NH_3 FIR laser line with buffer gas N_2 were studied. It was found that by adding proper buffer gas, FIR laser output power could be increased, and spectra widened because of the molecular collision. This work made it possible to develop high output and wide range tunable FIRL.