Gas Lasers, including: Excimer Laser, Krypton Fluoride Laser, Helium-neon Laser, Carbon Dioxide Laser, Gas Laser, Ion Laser, Nitrogen Laser, Tea Laser, Gas Dynamic Laser

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More info: A gas laser is a laser in which an electric current is discharged through a gas to produce coherent light. The gas laser was the first continuous-light laser and the first laser to operate "on the principle of converting electrical energy to a laser light output. The first gas laser, the Helium-neon laser (HeNe), was co-invented by Iranian physicist Ali Javan and American physicist William R. Bennett, Jr. in 1960.