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Proceedings Paper

Q-switched multikilowatt CO2 laser system excited by microwaves
Author(s): Ulrich Bielesch; M. Budde; M. Fischbach; Bernhard Freisinger; Johannes Heinrich Schaefer; Juergen Uhlenbusch; Wolfgang Vioel
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Paper Abstract

Microwave excitation of laser gases allows the deposition of high excitation energy densities into an active medium of relatively large diameter and volume. To take advantage of low cost commercially available generators a microwave frequency of (upsilon) equals 2.45 GHz was chosen. An oscillator amplifier system with TEM00 beam quality and tunable wavelength is used in order to obtain a cw laser output of maximum PL equals 7 kW. The output of a dc discharged, diffusion cooled CO2 laser oscillator operating in the TEM00 mode with an output power of 265 W (cw) and an average power of maximum 140 W in the pulsed mode is fed into an amplifier consisting of 24 modules, excited by two magnetrons of 2.7 kW power each. The discharge diameter of an amplifier module is d equals 0.051 m and the active length for one discharge module is 1 equals 0.3 m, yielding an active gain path of Lakt equals 7.2 m. In the pulsed mode the amplifier delivers a peak power of up to 1.9 MW at a repetition rate of 10 kHz.

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: 10.1117/12.144686
Show Author Affiliations
Ulrich Bielesch, Heinrich-Heine-Univ. (Germany)
M. Budde, Heinrich-Heine-Univ. (Germany)
M. Fischbach, Heinrich-Heine-Univ. (Germany)
Bernhard Freisinger, Heinrich-Heine-Univ. (Germany)
Johannes Heinrich Schaefer, Heinrich-Heine-Univ. (Germany)
Juergen Uhlenbusch, Heinrich-Heine-Univ. and Forschungszentrum Juelich (Germany)
Wolfgang Vioel, Heinrich-Heine-Univ. (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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