Abstract
A theory is presented for an HF chemical laser employing both the hot and cold pumping reactions under c.w. conditions. Six vibration-rotation lines are considered to be lasing simultaneously. Aerodynamic control is incorporated to the extent that the flow is assumed to expand continuously, maintaining isothermal static conditions in the gas. Closed form solutions are obtained for the populations of the excited states. The results show the influence of the numerous parameters of the system on the specific power output, gain, and saturation. While significant fractions of the chemical energy available can be converted into energy in the laser beam, the theory suggests there remains room for substantial improvement. Comparisons are also discussed for situations where some of the lines are suppressed

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