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| An acronym for Light Amplification by the Stimulated Emission of Radiation, lasers are a focused beam which has many applications in today's world. See the main [[Laser]] article for a history of this technology
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| [[Image:Laser 1966 French Satelite with Doppler Laser Attribution.jpg|thumb|right|The scientific satellite, Diadème with two radio transmitters and a laser - Image by Pline and The Museum of Air and Space in Paris, France ]] | | [[Image:Laser 1966 French Satelite with Doppler Laser Attribution.jpg|thumb|right|The scientific satellite, Diadème with two radio transmitters and a laser - Image by Pline and The Museum of Air and Space in Paris, France ]] |
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| | | An acronym for Light Amplification by the Stimulated Emission of Radiation, lasers are a focused beam which has many applications in today's world. See the main [[Laser]] article for a history of this technology |
| == Subcategories ==
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| *'''[[:Category:Atom lasers|Atom lasers]]''' - a coherent state of propagating atoms
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| *'''[[:Category:Chemical lasers|Chemical lasers]]''' - a laser that obtains its energy from a chemical reaction
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| *'''[[:Category:Free electron lasers|Free electron lasers]]''' - or FEL, a laser that shares the same optical properties as a conventional laser, but which use a relativistic electron beam as a lasing medium
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| *'''[[:Category:Gas lasers|Gas lasers]]''' - a laser in which the electric current is discharged through a gas to produce coherent light
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| *'''[[:Category:Laser applications|Laser applications]]''' - the uses and benefits of lasers
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| *'''[[:Category:Laser excitation|Laser excitation]]''' - using lasers to excite isotopes to induce separation or for other purposes
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| *'''[[:Category:Laser modes|Laser modes]]''' - the different states of oscillating laser waves, such as continuous-wave or quasi-contiunous wave
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| *'''[[:Category:Laser stability|Laser stability]]''' - the minimization of undesired vibrations in a laser
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| *'''[[:Category:Laser transitions|Laser transitions]]''' - or amplifier transition, a transition between two electronic levels of some laser-active ion
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| *'''[[:Category:Power lasers|Power lasers]]''' - lasers with high output powers
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| *'''[[:Category:Pump lasers|Pump lasers]]''' - lasers that use energy transfer from an external source into the gain medium of the laser
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| *'''[[:Category:Quantum well lasers|Quantum well lasers]]''' - a laser diode in which the active region of the device is narrow enough to cause quantum confinement
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| *'''[[:Category:Ring lasers|Ring lasers]]''' - a laser in which the laser cavity has the shape of a ring
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| *'''[[:Category:Semiconductor lasers|Semiconductor lasers]]''' - lasers based on a semiconductor gain media, where optical gain is achieved by stimulated emission at an interband transition
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| *'''[[:Category:Solid lasers|Solid-state lasers]]''' - a laser that uses a gain medium that is solid rather than liquid or gas
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| *'''[[:Category:Surface emitting lasers|Surface emitting lasers]]''' - a laser in which light propagates in the direction perpendicular to the surface, a type of semiconductor laser
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| [[Category:Lasers,_lighting_&_electrooptics|{{PAGENAME}}]] | | [[Category:Lasers,_lighting_&_electrooptics|{{PAGENAME}}]] |