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Proceedings Paper

Design of an e-beam-controlled 1-kW Ar:Xe laser
Author(s): Wilhelm Mayerhofer; Mark-Udo Beth
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Paper Abstract

Experimental investigations were carried out with Ar:Xe mixtures at 1 atm and with a wavelength of 1.7 micrometers using an existing CO2 pulsed laser system without special adaptation. Laser pulse energies EL <EQ 0.31 J (EL* equals 0.3 J/l(DOT)atm) were measured at efficiencies of (eta) <EQ 0.4% for various Ar:Xe mixtures. The electrical pulse energy supplied was Ed <EQ 70 J (Ed* <EQ 5.83 J/l(DOT)atm) at a pulse duration of tp equals 10 microsecond(s) . This limitation was a consequence of the mismatch between the electrical discharge modulator (PFN) with its impedance of 2 (Omega) and the plasma impedance of <EQ 0.2 (Omega) . The normalized field strength E/n equals 7.5(DOT)10-18 Vcm2 was determined for a power density of 1.16 kW/cm3. An improvised reduction of the PFN impedance to 0.20 (Omega) led to a c. 70% increase of the specific electrical energy supplied Ed* and to a c. 35% increase of the laser pulse energy EL. Typical characteristics such as discharge voltage and current over time, laser pulse power and plasma impedance are presented below. The specific data are given for scaling to a repetitive 1 kW laser design.

Paper Details

Date Published: 4 May 1993
PDF: 4 pages
Proc. SPIE 1810, 9th International Symposium on Gas Flow and Chemical Lasers, (4 May 1993); doi: 10.1117/12.144683
Show Author Affiliations
Wilhelm Mayerhofer, DLR Institut fuer Technische Physik (Germany)
Mark-Udo Beth, DLR Institut fuer Technische Physik (Germany)

Published in SPIE Proceedings Vol. 1810:
9th International Symposium on Gas Flow and Chemical Lasers
Costas Fotakis; Costas Kalpouzos; Theodore G. Papazoglou, Editor(s)

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