Two-Dimensional Time Dependent Modelling Of Density Perturbations In CO2 And Excimer Lasers

A. Holzwarth; K. Grunewald; P. Berger; H. Hugel

doi:10.1117/12.950548

20 June 1989 Two-Dimensional Time Dependent Modelling Of Density Perturbations In CO₂ And Excimer Lasers

A. Holzwarth, K. Grunewald, P. Berger, H. Hugel

Proceedings Volume 1031, 7th Intl Symp on Gas Flow and Chemical Lasers; (1989) https://doi.org/10.1117/12.950548
Event: 7th International Symposium on Gas Flow and Chemical Lasers, 1988, Vienna, Austria

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.

Citation Download Citation

A. Holzwarth, K. Grunewald, P. Berger, and H. Hugel "Two-Dimensional Time Dependent Modelling Of Density Perturbations In CO₂ And Excimer Lasers", Proc. SPIE 1031, 7th Intl Symp on Gas Flow and Chemical Lasers, (20 June 1989); https://doi.org/10.1117/12.950548

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