Traveling‐wave sub‐Doppler excited molecule energy transfer spectroscopy

A general formulation of traveling‐wave sub‐Doppler excited molecule energy transfer spectroscopy is presented. The line profile analysis is applied to that determined experimentally for the R(22) ν3 HCN transition. Pn the noise equivalent power of the detector is demonstrated to be ⩽10−12 W. Finally, the technique is applied to resolve the KsR(7) ν1 transition head in NH3.