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Proceedings Paper

High-power room-temperature operating cw CO laser excited by microwave discharge
Author(s): X. Luo; Johannes Heinrich Schaefer; Juergen Uhlenbusch
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Paper Abstract

In this contribution we present a high power cw CO laser operating at room temperature. A scheme of forced convective cooling by fast axial gas flow combined with microwave discharge excitation has been developed. A T-shaped laser tube made of Pyrex glass with 5.1 cm i.d. is located in a microwave resonator of 12.5 cm (W) X 5.6 cm (H) X 30 cm (L) in dimension. The microwave at 2.45 GHz of up to 6 kW power generated by a magnetron is coupled into the resonator using the R26 waveguide technique. The laser gas flows through the T-shaped laser tube and is circulated by a rootspump in a closed loop. Two water cooled heat exchangers cool away the waste heat and the compression heat. The optical cavity consists of a total reflecting gold coated copper mirror and an output coupling flat from CaF2 with 10% transmission. A maximum output power of 440 watts (or 1.4 kW/m) has been obtained from this laser system with a maximum efficiency of 8%. The laser characteristics have been studied. It is found that both Xe and O2 are important for the high power CO laser operation at room temperature. The laser is characterized by the modular construction of the discharging section, so that it can be easily extended to a multimodular system to increase the laser output power.

Paper Details

Date Published: 31 March 1995
PDF: 6 pages
Proc. SPIE 2502, Gas Flow and Chemical Lasers: Tenth International Symposium, (31 March 1995); doi: 10.1117/12.204891
Show Author Affiliations
X. Luo, Heinrich-Heine-Univ. Duesseldorf (Germany)
Johannes Heinrich Schaefer, Heinrich-Heine-Univ. Duesseldorf (Germany)
Juergen Uhlenbusch, Heinrich-Heine-Univ. Duesseldorf (Germany)


Published in SPIE Proceedings Vol. 2502:
Gas Flow and Chemical Lasers: Tenth International Symposium
Willy L. Bohn; Helmut Huegel, Editor(s)

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