DYNAMICS OF THE CO2 ATMOSPHERIC PRESSURE LASER WITH TRANSVERSE PULSE EXCITATION

Authors
  1. Gilbert, J.
  2. Lachambre, J.-L.
  3. Rheault, F.
  4. Fortin, R.
Corporate Authors
Defence Research Establishment Valcartier, Valcartier QUE (CAN)
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-N2-He appears to be consistent with the major features of experimental observation.
Date of publication
01 Jan 1972
Number of Pages
13
Reprinted from
Canadian J of Physics, vol 50, no 20, 1972, p 2523-2535
DSTKIM No
73-02909
CANDIS No
18418
Format(s):
Hardcopy

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