Spike Phenomenon in Raman Spectrum of Optically Pumped Ear-Infrared Laser

Based on the theory of semi-classical density matrix, spike phenomenon of multi-longitudinal-mode CO2-9R(30) optically pumped miniature NH₃ molecules far-infrared cavity laser was theoretically studied and the reason of forming spike phenomenon was approved as two aspects: one was the competitive effect caused by the process of AC Stack splitting two photons, which made that the output optical spectral intensity of one AC Stark splitting peak was stronger than that of the other AC Stark splitting peak; the other was the longitudinal-mode spectral characteristics of laser resonant cavity.