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Laser science
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{{Short description|Branch of optics}} {{Redirect|Laser physics|the journal|Laser Physics (journal)}} [[File:Military laser experiment.jpg|thumb|250px|A laser experiment on an [[optical table]]]] [[File:Light Amplification by Stimulated Emission of Radiation.jpg|thumb|250px|Laser modules (bottom to top: 405, 445, 520, 532, 635, and 660 nm)]] '''Laser science''' or '''laser physics''' is a branch of [[optics]] that describes the theory and practice of [[laser]]s.<ref>{{Cite book |last=Taylor |first=Travis S. |title=Introduction to laser science and engineering |date=2020 |publisher=CRC Press, Taylor & Francis Group |isbn=978-1-138-03639-0 |edition=1st |location=Boca Raton London New York}}</ref> Laser science is principally concerned with [[quantum electronics]], [[laser construction]], [[optical cavity]] design, the physics of producing a [[population inversion]] in [[active laser medium|laser media]], and the temporal evolution of the light field in the laser. It is also concerned with the physics of laser beam propagation, particularly the physics of [[Gaussian beam]]s, with [[laser applications]], and with associated fields such as [[nonlinear optics]] and [[quantum optics]].
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