Accession Number : ADA191425

Title :   Effects of Translational and Rotational Nonequilibrium on cw Chemical Laser Performance.

Descriptive Note : Technical rept.,

Corporate Author : AEROSPACE CORP EL SEGUNDO CA AEROPHYSICS LAB

Personal Author(s) : Mirels, Harold

PDF Url : ADA191425

Report Date : 01 Mar 1988

Pagination or Media Count : 58

Abstract : A previous model used to describe continuous wave (cw) chemical laser performance is generalized to include rotational as well as translational nonequilibrium. The resultant equations are simplified by the realistic assumption that translational and rotational relaxation rates are fast compared with convection, chemical pumping, and collisional deactivation rates. As a consequence, translational and rotational relaxation rates are in equilibrium with stimulated emission. The resultant system of equations is independent of rotational relaxation. An amplifier solution is presented that predicts saturation effects in accord with experiments. Fabry-Perot oscillator solutions are also presented for a multiline saturated laser and for a partly saturated single-lien laser. The present results provide a base for simplification of numerical codes. It is concluded that a resonable first estimate for cw chemical laser performance can be obtained by assuming rotational equilibrium and translational nonequilibrium. Keywords: Chemical laser model, Chemical lasers; Continuous wave.

Descriptors :   *CHEMICAL LASERS, *CONTINUOUS WAVES, *LASER PUMPING, AMPLIFIERS, CODING, COLLISIONS, CONTINUOUS WAVE LASERS, CONVECTION, DEACTIVATION, EMISSION, EQUATIONS, EQUILIBRIUM(GENERAL), ESTIMATES, FABRY PEROT INTERFEROMETERS, LASERS, MODELS, NUMERICAL METHODS AND PROCEDURES, OSCILLATORS, PERFORMANCE(ENGINEERING), RATES, RELAXATION, ROTATION, SATURATION, SIMPLIFICATION, SOLUTIONS(GENERAL), STIMULATION(GENERAL)

Subject Categories : Lasers and Masers

Distribution Statement : APPROVED FOR PUBLIC RELEASE