Effects of buffer gas on the output of optically pumped NH3 far-infrared cavity laser

By solving the semi-classical density matrix equations and developing a buf fer gas mechanism model, the effects of buffer gas on the output power of o ptically pumped NH, far-infrared cavity laser were calculated and verified by experiment. Our results showed that: the output power of NH3, far-infrar ed laser could be increased when certain buffer gas was added into the lase r medium, and there existed an optimum ratio of gases mixture and an optimu m operating gas pressure which could make the output power of far-infrared laser reach maximum.