Frequency-tunable optically pumped carbon monoxide laser

摘要

Single-line frequency-tunable lasing was observed in an opticallynpumped, repetitively pulsed, room-temperature CO laser for the firstntime. The R(0) and R(7) ro-vibrational transitions in the (2,0) overtonenof CO at 2.3 Μm were optically pumped with a high-energy opticalnparametric oscillator. Single-line lasing was observed on (2,1)nP(2)-P(17) transitions and R(0)-R(11) transitions (covering wavelengthsnwithin the range 4.6-4.9 Μm) when using a diffraction grating as thenspectrally selective reflector of the laser resonator. The observed COnlaser pulse lengths were ~10-7 s with peak power up ton104 W. The influence of CO pressure, the addition of bufferngas (He, Ar), Q-factor of the laser resonator, and the pump pulse energynon CO laser pulse temporal characteristics and output energy spectralndistribution was studied experimentally