Editing Four-wave mixing (section)

== Applications ==
FWM finds applications in [[optical phase conjugation]], [[Optical parametric amplifier|parametric amplification]], [[Supercontinuum|supercontinuum generation]], [[Ultraviolet#Tunable vacuum ultraviolet (VUV)|Vacuum Ultraviolet light generation]] and in microresonator based [[frequency comb]] generation. Parametric amplifiers and oscillators based on four-wave mixing use the third order nonlinearity, as opposed to most typical parametric oscillators which use the second-order nonlinearity. Apart from these classical applications, four-wave mixing has shown promise in the [[Quantum optics|quantum optical]] regime for generating [[Single-photon source|single photons]],<ref>{{Cite journal|last1=Fan|first1=Bixuan|last2=Duan|first2=Zhenglu|last3=Zhou|first3=Lu|last4=Yuan|first4=Chunhua|last5=Ou|first5=Z. Y.|last6=Zhang|first6=Weiping|date=2009-12-03|title=Generation of a single-photon source via a four-wave mixing process in a cavity|journal=Physical Review A|volume=80|issue=6|pages=063809|doi=10.1103/PhysRevA.80.063809|bibcode=2009PhRvA..80f3809F}}</ref> correlated photon pairs,<ref>{{Cite journal|last1=Sharping|first1=Jay E.|last2=Fiorentino|first2=Marco|last3=Coker|first3=Ayodeji|last4=Kumar|first4=Prem|last5=Windeler|first5=Robert S.|date=2001-07-15|title=Four-wave mixing in microstructure fiber|journal=Optics Letters|language=EN|volume=26|issue=14|pages=1048–1050|doi=10.1364/OL.26.001048|pmid=18049515|issn=1539-4794|bibcode=2001OptL...26.1048S}}</ref><ref>{{Cite journal|last1=Wang|first1=L. J.|last2=Hong|first2=C. K.|last3=Friberg|first3=S. R.|date=2001|title=Generation of correlated photons via four-wave mixing in optical fibres|url=http://stacks.iop.org/1464-4266/3/i=5/a=311|journal=Journal of Optics B: Quantum and Semiclassical Optics|language=en|volume=3|issue=5|pages=346|doi=10.1088/1464-4266/3/5/311|issn=1464-4266|bibcode=2001JOptB...3..346W|url-access=subscription}}</ref> [[squeezed light]]<ref>{{Cite journal|last1=Slusher|first1=R. E.|last2=Yurke|first2=B.|last3=Grangier|first3=P.|last4=LaPorta|first4=A.|last5=Walls|first5=D. F.|last6=Reid|first6=M.|date=1987-10-01|title=Squeezed-light generation by four-wave mixing near an atomic resonance|journal=JOSA B|language=EN|volume=4|issue=10|pages=1453–1464|doi=10.1364/JOSAB.4.001453|issn=1520-8540|bibcode=1987JOSAB...4.1453S}}</ref><ref>{{Cite journal|last1=Dutt|first1=Avik|last2=Luke|first2=Kevin|last3=Manipatruni|first3=Sasikanth|last4=Gaeta|first4=Alexander L.|last5=Nussenzveig|first5=Paulo|last6=Lipson|first6=Michal|date=2015-04-13|title=On-Chip Optical Squeezing|journal=Physical Review Applied|volume=3|issue=4|pages=044005|doi=10.1103/PhysRevApplied.3.044005|bibcode=2015PhRvP...3d4005D|arxiv=1309.6371|s2cid=16013174 }}</ref> and [[Quantum entanglement|entangled photons]].<ref>{{Cite journal|last1=Takesue|first1=Hiroki|last2=Inoue|first2=Kyo|date=2004-09-30|title=Generation of polarization-entangled photon pairs and violation of Bell's inequality using spontaneous four-wave mixing in a fiber loop|journal=Physical Review A|volume=70|issue=3|pages=031802|doi=10.1103/PhysRevA.70.031802|arxiv=quant-ph/0408032|bibcode=2004PhRvA..70c1802T|s2cid=18095922 }}</ref>