レーザ発振器の開発とビームの集光特性 : 高尖頭値パルスCO_2レーザ加工に関する研究(第1報)

概要

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It is very difficult to obtain high quality without cracks and charring by heat affection in the field of materials processing on ceramics or fibre reinforced plastics (FRP) by conventional CO_2 laser owing to its low peak power and long pulse duration. A high peak and rectangular pulse CO_2 laser excited by 1 MHz-silent discharge has developed. With the development of a new electrode system utilizing high dielectric constant ceramics plate, homogeneous discharge of power density up to 355 W/cm^3 is obtained. An output peak power of 5 kW and pulse duration of 30 to 150 μs in a stable TEM_<00> mode operation is attained. A profile of focused beam can be measured by adopting 'Straight Edge Method' and it was made clear that the laser beam has a performance of convergency based on diffraction theory.
社団法人溶接学会の論文
1992-11-05