Nonlinear optics

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1、1NonlinearOpt5.NonlinearOpticsThischapterprovidesabriefintroductionintothe5.4.6OpticalPhaseConjugation.............13basicnonlinear-opticalphenomenaanddiscusses5.4.7OpticalBistabilityandSwitching....14someofthemostsignificantrecentadvancesand5.4.8StimulatedRa

2、manScattering.........16breakthroughsinnonlinearoptics,aswellasnovel5.4.9Third-HarmonicGenerationapplicationsofnonlinear-opticalprocessesandbyUltrashortLaserPulses..............17devices.5.5UltrashortLightPulsesNonlinearopticsistheareaofopticsthatinaResonant

3、Two-LevelMedium:studiestheinteractionoflightwithmatterinSelf-InducedTransparencytheregimewheretheresponseofthematerialandthePulseAreaTheorem..................22systemtotheappliedelectromagneticfieldis5.5.1InteractionofLightnonlinearintheamplitudeofthisfield.At

4、lowwithTwo-LevelMedia..................22lightintensities,typicalofnon-lasersources,the5.5.2TheMaxwellandSchrödingerpropertiesofmaterialsremainindependentofEquationsforaTwo-LevelMedium22theintensityofillumination.Thesuperposition5.5.3PulseAreaTheorem........

5、..............24principleholdstrueinthisregime,andlightwaves5.5.4AmplificationcanpassthroughmaterialsorbereflectedfromofUltrashortLightPulsesboundariesandinterfaceswithoutinteractingwithinaTwo-LevelMedium................25eachother.Lasersources,ontheotherhand,

6、can5.5.5Few-CycleLightPulsesprovidesufficientlyhighlightintensitiestomodifyinaTwo-LevelMedium................27PartAtheopticalpropertiesofmaterials.Lightwaves5.6LetTherebeWhiteLight:cantheninteractwitheachother,exchangingSupercontinuumGeneration..............

7、....29momentumandenergy,andthesuperposition5.6.1Self-PhaseModulation,5principleisnolongervalid.ThisinteractionoflightFour-WaveMixing,wavescanresultinthegenerationofopticalfieldsandModulationInstabilitiesatnewfrequencies,includingopticalharmonicsofinSuperconti

8、nuum-Generatingincidentradiationorsum-ordifference-frequencyPhotonic-CrystalFibers.................29signals.5.6.2Cross-Phase-Modulation-InducedInstabilities.................................315.