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Lasers

Carbon-dioxide laser
Continuous or pulsed source of coherent radiation
Dye laser
Equipment using an organic dye to emit coherent light
Gas laser
Laser in which the active medium is a gas
Helium–neon laser
Type of gas laser
Maser
Microwave Amplification by Stimulated Emission of Radiation
MPEG-4 Part 20
Rich media standard
Nd:YAG laser
Crystal used as a lasing medium for solid-state lasers
Ruby laser
Solid-state laser with ruby as gain medium
Solid-state laser
Laser that uses a gain medium that is a solid, rather than a liquid such as in dye lasers or a gas as in gas lasers