Carbon dioxide laser
The carbon dioxide laser is a gas laser with CO2 gas as the working substance. The discharge tube is usually made of glass or quartz material, filled with CO2 gas and other auxiliary gases (mainly helium and nitrogen, and usually a small amount of hydrogen or xenon); the electrode is generally a hollow cylinder made of nickel; resonant cavity One end is a gold-plated total reflection mirror, and the other end is a partial reflection mirror polished with germanium or gallium arsenide.