Operating characterics of an optically pumped waveguide fir laser

Abstract

We report measurements of the effect of resonator length changes, 13CO 2 laser frequency and 13CO 2 laser intensity on the FIR power emitted by an optically pumped waveguide FIR laser operating on the exceptionally strong 15NH 3 laser line at 152.9 μm. The Doppler-splitting of the FIR output frequency shows a CO 2 power-dependent deviation from the linear dependence on 13CO 2 laser frequency expected from rate equation theory. Similar, but weaker, effects are also reported using the less strong CH 3OH FIR line at 118.8 μm.