Tuning behavior of a ch3f amplified spontaneous emission laser

Abstract

Using a single mode tuneable CO2 laser to pump the Q(12) transition in CH3 F and a heterodyne receiver to make frequency measurements on the resulting FIR radiation, we have documented the near resonance tuning behavoir of this FIR Raman transition as the pump laser is tuned. Nonlinear frequency tuning of FIR emission is observed due to inhomogeneous (K level) broadening of the Raman transition.