New cascade laser transitions in CH₂F₂ pumped with the 9R32 line of a cw CO₂ laser

Abstract

New cascade laser transitions of¹²CH₂F₂ at 172.50μm, 208.83μm, 220.44μm, 223.99μm and 250.61μm are reported. A waveguide FIR laser was pumped with a quasi cw¹²C¹⁶O₂ laser operating on the 9R32 line. Together with the already known lines at 184.3μm, 196.1μm and 235.9μm, the laser lines can be assigned to rotational transitions in the ν₉ vibrational band of¹²CH₂F₂ and to refill transitions of the vibrational ground state ν₀.