Pulsed H2 — F2 laser with simultaneous lasing on rotational and vibrational—rotational transitions

The possibility of operation of a pulsed chemical H₂ — F₂ laser on purely rotational transitions with simultaneous lasing on vibrational—rotational transitions is theoretically investigated. The lasing of a hydrogen—fluorine laser (mixture pressure 1.1 atm) on both v,j — 1 → v — 1,j (j = 2 — 20) and v,j → v,j — 1 (j = 12 — 19) transitions has been modelled taking into account the resonant one- and two-quanta vibrational—rotational processes. The calculated specific energy extraction for purely rotational transitions reaches 0.3—0.5 J L^-1 at j = 18 and 19 (wavelength 15.5—14 μm) and 0.4—0.7 J L^-1 at j = 13 and 14 (wavelength 21—19 μm).