Abstract
A 5-μm band CO laser is currently very attractive for industrial use because of its shorter output wavelength and much higher operating efficiency compared with CO2 iasers.1 In the laser-based cutting of steeis, for example, better cutting characteristics for a CO laser than for a CO2 laser have been experimentally demonstrated very recently.2 The feasibility of beam delivery through glass fibers is also very attractive.3 To obtain a laser output of more than 5 kW a large volume self-sustained discharge excited cw CO laser with a closed-loop subsonic gas flow has been constructed based on technical data obtained with a prototype GO laser device.4
© 1989 Optical Society of America
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