Abstract

We present a novel technique for resonantly pumping a continuous-wave far-infrared NH3 laser with a line-tunable mid-infrared NH3 laser that is optically pumped by a CO2 laser. In this two-step process we first convert 10-μm CO2 laser photons into 11–13-μm NH3 laser photons, which are then converted into 60–400-μm photons in a far-infrared NH3 laser. Continuous-wave laser action on 10 far-infrared lines of 15NH3, including four new ones, has been obtained with a single CO2 laser pump line.

© 1996 Optical Society of America

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