Spectral characteristics comparison of pulsed optically pumped NH_3 and CH3OH far-infrared laser

摘要

By solving the density matrix equations of a quantum system, the output power intensity of pulsed optically pumped NH_3 and CH3OH far-infrared laser (OPFIRL) was calculated respectively by means of iteration method. Based on the calculations, the spectral characteristics of pulsed NH_3-OPFIRL and CH_3OH-OPFIRL were studied and compared theoretically. The differences of spectral characteristics between the NH_3-OPFIRL and CH_3OH-OPFIRL were found. Experimentally, a series of FIR emissions of NH_3 and CH_3OH cavity lasers pumped by TEA-CO_2 laser were measured, and the experimental results were in agreement with theoretical calculations.