Editing Stimulated emission (section)

== History ==
Stimulated emission was a theoretical discovery by [[Albert Einstein]] within the framework of the [[old quantum theory]], wherein the emission is described in terms of photons that are the quanta of the EM field.<ref name=Einstein1916>{{cite journal|last=Einstein|first=A|title=Strahlungs-emission und -absorption nach der Quantentheorie|journal=Verhandlungen der Deutschen Physikalischen Gesellschaft|year=1916|volume=18|pages=318–323|bibcode = 1916DPhyG..18..318E }}</ref><ref name=Einstein1917>{{cite journal|last=Einstein|first=A|title=Zur Quantentheorie der Strahlung|journal=Physikalische Zeitschrift|year=1917|volume=18|pages=121–128|bibcode = 1917PhyZ...18..121E }}</ref> Stimulated emission can also occur in classical models, without reference to photons or quantum-mechanics.<ref name="Fain & Milonni">{{Cite journal | last1 = Fain | first1 = B. | last2 = Milonni | first2 = P. W. |author-link2=Peter W. Milonni| doi = 10.1364/JOSAB.4.000078 | title = Classical stimulated emission | journal = Journal of the Optical Society of America B | volume = 4 | pages = 78 | year = 1987 | issue = 1 |bibcode = 1987JOSAB...4...78F }}</ref>{{Primary source inline |reason=This claim is surprising enough that it should cite a reliable secondary source.|date=November 2024}} (See also ''{{slink|Laser|History}}''.) According to physics professor and director of the MIT-Harvard Center for Ultracold Atoms [[Daniel Kleppner]], Einstein's theory of radiation was ahead of its time and prefigures the modern theory of quantum electrodynamics and quantum optics by several decades.<ref name="Kleppner">{{cite journal |last1=Kleppner |first1=Daniel |title=Rereading Einstein on Radiation |journal=Physics Today |date=1 February 2005 |volume=58 |issue=2 |pages=30–33 |doi=10.1063/1.1897520 |bibcode=2005PhT....58b..30K |url=https://physicstoday.scitation.org/doi/abs/10.1063/1.1897520?journalCode=pto |access-date=1 June 2022}}</ref>