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 more 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 preceding pulses, whereas, in the CO2 laser, the density change due to the pulse under consideration itself additionally leads to phase distortions.
%0 Conference Paper
%1 Holzwarth.1989.Two-dimensional
%A Holzwarth, Achim
%A Grünewald, Karin
%A Berger, Peter
%A Hügel, Helmut
%B Seventh International Symposium on Gas Flow and Chemical Lasers
%D 1989
%E Schuöcker, Dieter
%I SPIE
%K CO2 Excimer GasFlow Laser myown
%R 10.1117/12.950548
%T Two-Dimensional Time Dependent Modelling Of Density Perturbations In CO2 And Excimer Lasers
%U https://doi.org/10.1117/12.950548
%V 1031
%X 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 more 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 preceding pulses, whereas, in the CO2 laser, the density change due to the pulse under consideration itself additionally leads to phase distortions.
@inproceedings{Holzwarth.1989.Two-dimensional,
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 more 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 preceding pulses, whereas, in the CO2 laser, the density change due to the pulse under consideration itself additionally leads to phase distortions.},
added-at = {2019-11-19T11:35:00.000+0100},
author = {Holzwarth, Achim and Grünewald, Karin and Berger, Peter and Hügel, Helmut},
biburl = {https://puma.ub.uni-stuttgart.de/bibtex/2bc89fa74ea304fef63abc778a9b7ac56/peterberger},
booktitle = {Seventh International Symposium on Gas Flow and Chemical Lasers},
doi = {10.1117/12.950548},
editor = {Schuöcker, Dieter},
eventdate = {August 22 - 26, 1988},
eventtitle = {7th International Symposium on Gas Flow and Chemical Lasers (GCL)},
interhash = {67f13539dcfa0072cfd4360a6c9e2021},
intrahash = {bc89fa74ea304fef63abc778a9b7ac56},
keywords = {CO2 Excimer GasFlow Laser myown},
month = jun,
publisher = {SPIE},
series = {Proc. SPIE},
timestamp = {2019-11-19T10:35:00.000+0100},
title = {Two-Dimensional Time Dependent Modelling Of Density Perturbations In CO2 And Excimer Lasers },
url = {https://doi.org/10.1117/12.950548},
venue = {Vienna, Austria},
volume = 1031,
year = 1989
}
