Abstract
Recently, the power of the CO2 laser oscillator increased; in Japan, the maximum power of a commercial CO2 laser oscillator is now 10 kW, but the needs of higher-power laser oscillators are expected to increase in future. However, the use of CO2 laser welding does neat grow much, and we believe that there are two major reasons for the fact that highpower CO; laser welding has not been widely used: the large laser plasma generated at the welding point, and laser processing stability is difficult to secure as the power increases because of performance instability of the transmission optical components.
© 1992 Optical Society of America
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