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Proceedings Paper

Two-Dimensional Time Dependent Modelling Of Density Perturbations In CO2 And Excimer Lasers
Author(s): A. Holzwarth; K. Grunewald; P. Berger; H. Hugel
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Paper Abstract

Theoretical investigations on the generation and propagation of density perturbations have been performed using a two-dimensional unsteady finite-difference method. In comparing typical results for CO2 and excimer lasers it becomes evident that both the formation and the physical impacts of the perturbations differ substantially. At equal values of deposited energy density the relative density variation is ore than an order of magnitude higher in the CO2 laser, whereas, due to their different wave lengths the resulting phase shift is about the same in both systems. In the excimer laser the beam quality will be detracted by only the perturbations of the preceeding pulses whereas in the CO2 laser the density change due to the pulse under consideration itself additionally leads to phase distortions.

Paper Details

Date Published: 20 June 1989
PDF: 7 pages
Proc. SPIE 1031, 7th Intl Symp on Gas Flow and Chemical Lasers, (20 June 1989); doi: 10.1117/12.950548
Show Author Affiliations
A. Holzwarth, Universitat Stuttgart (Germany)
K. Grunewald, Universitat Stuttgart (Germany)
P. Berger, Universitat Stuttgart (Germany)
H. Hugel, Universitat Stuttgart (Germany)

Published in SPIE Proceedings Vol. 1031:
7th Intl Symp on Gas Flow and Chemical Lasers
Dieter Schuoecker, Editor(s)

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