Proc. SPIE. 6735, International Conference on Lasers, Applications, and Technologies 2007: High-Power Lasers and Applications
KEYWORDS: Continuous wave operation, Chemical species, Molecules, Energy transfer, Numerical simulations, Hydrogen fluoride lasers, Chemical lasers, Fluorine, Deuterium fluoride lasers, Molecular energy transfer
The comparison of three most popular kinetic packages by the results of the numerical simulations of autonomous cw
HF (DF) chemical lasers was carried out The differences in the small signal gains obtained by means of 1976-1977
kinetic package and at 1982 (2002) package reach about of 40...60% for HF laser, and about of 70...80% for DF laser.
The comparison of rate constants for separate processes was made.
The cw chemical laser generating simultaneously on molecules HF (λ~ 2.7 &mgr;) and HBr (λ~ 4.2 &mgr;) is investigated by
means of CFD code based on 2D Navier-Stocks equations. Such laser differs from the conventional cw HF laser by the
strong thermal emission. In spite of much weaker gain properties of molecule HBr in comparison with HF it is possible
to achieve the HBr laser power ~ 25 W from 1 sm<sup>2</sup> nozzle bank surface at lasing zone length ~20 sm. The desirable
HF/HBr power ratio can be adjusted by bromine dilution of the secondary fuel.