Accession Number : AD0760231

Title :   Dynamics of the CO2 Atmospheric Pressure Laser with Transverse Pulse Excitation,

Corporate Author : DEFENCE RESEARCH ESTABLISHMENT VALCARTIER QUEBEC

Personal Author(s) : Gilbert,J. ; Lachambre,J. L. ; Rheault,F. ; Fortin,R.

Report Date : 29 JUN 1972

Pagination or Media Count : 14

Abstract : The dynamical processes responsible for laser emission in the pulsed pumping of a transversely excited atmospheric (TEA) CO2 laser are investigated. An explanation for the formation of the giant pulse is proposed on the basis of a gain-switching mechanism in which it is assumed that with short strong-current pulses a high population inversion can be achieved prior to the onset of laser action. The kinetics of the mechanism are described by means of a set of nonlinear rate equations idealized to a four-energy-state system. With suitable initial conditions on the populations, the transient solution of these equations for the mixtures CO2-He and CO2-He appears to be consistent with the major features of experimental observation. (Author)

Descriptors :   (*GAS LASERS, REACTION KINETICS), (*INFRARED LASERS, POWER), CARBON DIOXIDE, EXCITATION, ATOMIC ENERGY LEVELS, ELECTRON TRANSITIONS, CANADA

Subject Categories : Lasers and Masers

Distribution Statement : APPROVED FOR PUBLIC RELEASE