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Laser - Revision history
2026-05-13T08:59:04Z
Revision history for this page on the wiki
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2025-02-23T21:45:09Z
<p>CSV import</p>
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<td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 21:45, 23 February 2025</td>
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https://wikimd.org/index.php?title=Laser&diff=5264607&oldid=prev
Prab: CSV import
2024-02-24T11:09:54Z
<p>CSV import</p>
<p><b>New page</b></p><div>'''Laser'''<br />
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A '''[[Laser]]''' (an acronym for ''Light Amplification by Stimulated Emission of Radiation'') is a device that emits light through a process of optical amplification based on the stimulated emission of electromagnetic radiation. The term "laser" originated as an acronym for "light amplification by stimulated emission of radiation".<br />
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==History==<br />
The first working laser was built in 1960 by [[Theodore H. Maiman]] at [[Hughes Research Laboratories]], based on theoretical work by [[Charles Hard Townes]] and [[Arthur Leonard Schawlow]].<br />
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==Principle of operation==<br />
Lasers are distinguished from other light sources by their coherence. Spatial coherence is typically expressed through the output being a narrow beam, which is diffraction-limited. Lasers can also have high temporal coherence, which allows them to emit light with a very narrow spectrum.<br />
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==Types of lasers==<br />
There are many types of lasers including [[Gas laser|gas lasers]], [[Chemical laser|chemical lasers]], [[Dye laser|dye lasers]], [[Metal-vapor laser|metal-vapor lasers]], [[Solid-state laser|solid-state lasers]], [[Semiconductor laser|semiconductor lasers]], [[Dye laser|dye lasers]], and [[Excimer laser|excimer lasers]].<br />
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==Applications==<br />
Lasers have many applications in areas such as [[Medicine|medicine]], the [[Military|military]], [[Research|research]], [[Industry|industry]], and [[Consumer electronics|consumer electronics]].<br />
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==Safety==<br />
Due to the potential for physical harm, several standards exist for those who work with lasers.<br />
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==See also==<br />
* [[List of laser types]]<br />
* [[Laser safety]]<br />
* [[Laser applications]]<br />
* [[Laser construction]]<br />
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==References==<br />
<references /><br />
<br />
[[Category:Optical devices]]<br />
[[Category:American inventions]]<br />
[[Category:Photonics]]<br />
[[Category:Quantum electronics]]<br />
[[Category:Lasers]]<br />
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