Excitation medium gas of carbon dioxide gas laser, marking device using carbon dioxide gas laser, method of generating carbon dioxide laser, marking method using carbon dioxide gas laser, and carbon dioxide laser light source

摘要

PROBLEM TO BE SOLVED: To generate a short pulse laser having no pulse tail, by which a sufficient energy exceeding 10 mJ as an irradiation energy of a peak pulse can be obtained.SOLUTION: A carbon dioxide gas laser excitation medium gas comprises a carbon dioxide gas, nitrogen and helium, which are mixed in the proportion below on a volume basis: Carbon dioxide gas:Nitrogen:helium=20:1:5-40. In the carbon dioxide gas laser excitation medium gas, the nitrogen is mixed in a range from more than 0 to less than 5.9% with respect to 2.4% in its partial pressure (concentration). The carbon dioxide gas laser excitation medium gas enables the generation of a short pulse laser of 10 mJ or more in peak pulse irradiation energy with no pulse tail.SELECTED DRAWING: Figure 1