Efficient millimetre far infrared laser emissions in different molecular systems

Abstract The use of an optimised configuration on a commercial CO 2 laser pumping a suitable far infrared (FIR) resonator allowed the observation of several millimetre FIR pulsed emissions in three different gases (NH 3 , CH 3 I, CH 3 Br). Some of these emissions were observed for the first time. In all cases, the measured efficiencies were improved in comparison to the values presented in previous works.