A gas laser is a laser whose gain medium is a gas. The wavelengths emitted by gas lasers have a high beam quality. Their powers
depend on the gases and gas mixtures used. The gases used in gas lasers include helium, neon, argon, nitrogen and carbon dioxide. Helium-neon lasers emit light in diverse wavelengths. In the visible light range, the individual wavelengths are red with a wavelength of 632.8 nm, green with 543.5 nm, yellow with 594.1 nm, and orange with 611.9 nm. In addition, there are He-Ne lasers that emit light in the infrared range. Their output powers range from a few milliwatts to several watts
. They are used in interferometers, among other thingsArgon-ion las
erswork with the noble gas argon (Ar), which forms the amplification medium as argon plasma. Argon lasers have output powers of up to 100 W.
Interms of emission, they cover many wavelengths in the visible light range and in ultraviolet UV light
. Thesame applies to
thekrypton ion laser
as to the argon laser. They can also emit light at various wavelengths and have a relatively high output powerCarbon dioxide lasers use carbon dioxide (CO2), helium and nitrogen (N2) as a gas mixture. Their emitted wavelength is in the long-wave infrared range between 9 µm and 11 µm, and their output power can be several kilowatts. Since their efficiency
isabout 10 %, carbon dioxide lasers
require relatively high supply powersNitrogen lasers usenitrogen (N2) for light amplification.
They operate in the ultraviolet range of an emitted wavelength of 337.1 nm. They have a relatively good efficiency.