Model for pulse amplification by a gaseous laser amplifier
Abstract
We have developed a computational model for pulse amplification by a pulsed electric discharge laser amplifier. We have applied the model to the copper vapor system, for which the oscillator has previously been modeled on a 0D level and a 1D level. The laser intensity transport equations are set up on a ray and are differenced with respect to the axial coordinate. Amplified spontaneous emission is handled similarly. Rate equations for the atomic levels are set up in each axial cell. The motion of the atoms is negligible on the nanosecond time scales of interest. The entire system of equations is advanced in time by a standard mathematical package. Working with a selection of input pulse shapes and energies, we have obtained predictions for the amplified signal as a function of time. We have also obtained results for related diagnostics such as the radiation profiles along the tube at selected times.
 Publication:

NASA STI/Recon Technical Report N
 Pub Date:
 October 1987
 Bibcode:
 1987STIN...8826657B
 Keywords:

 Amplification;
 Gas Lasers;
 Pulsed Lasers;
 Brightness;
 Light Amplifiers;
 Mathematical Models;
 Lasers and Masers