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). (lasers)