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Proceedings Paper

Microwave-discharge-excited CO2 laser using orthogonal electric fields
Author(s): Koichi Saito; Makoto Kato; Hiroyoshi Yajima; Nobuaki Furuya; Minoru Kimura; Shigeki Yamane
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Paper Abstract

We have developed a high-power microwave discharge excited carbon-dioxide laser oscillator by using a newly developed method called the orthogonal electric fields method in which the vibration direction of an electric field changes over time for achievement of a homogeneously spread electric discharge. A homogeneously spread electric discharge with a high output power and a high laser efficiency has been generated. The relative discharge area of the electric discharge accounted for about 70% of the cross section of the laser tube. In the configuration of a single discharge area, we achieved a maximum laser output power of 273 W at 1450 W microwave input power, and a a maximum laser efficiency of 20.2% at 1070 W microwave input power. At the maximum laser output power, the input power density was high, at about 240 W/cm3, which is about 20 times that achieved using a dc discharge method. Furthermore, a demonstration model having five electric discharge areas in a laser tube showed a maximum laser output power of 609 W at 3590 W microwave input power, and a maximum laser efficiency of 22.7% at 1394 W microwave input power. This work demonstrates the possibility of fabrication of a high-power microwave discharge excited carbon-dioxide laser which could be widely used industrially.

Paper Details

Date Published: 4 April 1997
PDF: 11 pages
Proc. SPIE 2987, Gas and Chemical Lasers and Applications II, (4 April 1997); doi: 10.1117/12.271550
Show Author Affiliations
Koichi Saito, Matsushita Research Institute Tokyo, Inc. (Japan)
Makoto Kato, Matsushita Research Institute Tokyo, Inc. (Japan)
Hiroyoshi Yajima, Matsushita Research Institute Tokyo, Inc. (Japan)
Nobuaki Furuya, Matsushita Research Institute Tokyo, Inc. (Japan)
Minoru Kimura, Matsushita Industrial Equipment Co., Ltd. (Japan)
Shigeki Yamane, Matsushita Industrial Equipment Co., Ltd. (Japan)


Published in SPIE Proceedings Vol. 2987:
Gas and Chemical Lasers and Applications II
Robert C. Sze; Ernest A. Dorko, Editor(s)

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