Ma. Azarov et al., Spectral and energy characteristics of a pulsed hydrogen fluoride laser and rotational relaxation of HF molecules, QUANTUM EL, 29(10), 1999, pp. 859-861
The spectrotemporal and energy characteristics of the radiation of a pulsed
chemical H-2-F-2 laser were calculated on the basis of a multilevel model
taking into account the nonequilibrium population of the rotational levels,
and were compared with experimental data. The theoretical model took into
account the stimulated emission of radiation as a result of the v, j -1 -->
v - 1, j transitions (v = 1 - 6 and j = 4 - 12) in the HF molecule. The ro
tational relaxation fate constants of the HF molecule were varied in the ca
lculations. Comparison of the calculated and experimental spectral characte
ristics of the laser radiation indicates that the rate of the rotational tr
ansitions involving high (j = 10-12) rotational sublevels of HF is insuffic
ient, leading to an appreciable reduction in the energy of the output radia
tion for lines with such values of j, compared with lines characterised by
j = 7, 8.