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1、1484J.Opt.Soc.Am.B/Vol.23,No.7/July2006M.G.BanaeeandJ.F.YoungHigh-ordersolitonbreakupandsolitonself-frequencyshiftsinamicrostructuredopticalfiberM.G.BanaeeandJeffF.YoungDepartmentofPhysicsandAstronomy,AdvancedMaterialsandProcessEngineeringLaboratory,Univ
2、ersityofBritishColumbia,Vancouver,BritishColumbia,CanadaV6T1Z4ReceivedAugust5,2005;revisedFebruary6,2006;acceptedFebruary20,2006;postedMarch7,2006(Doc.ID63837)Ultrashortpulsepropagationinapolarization-maintainingmicrostructuredÞber(with1mcorediameteran
3、d1.1mlength)isinvestigatedexperimentallyandtheoretically.Foran80MHztrainof130fspulseswithaveragepowersupto13.8mWlaunchedintothelowesttransversemodeoftheÞber,theoutputspectraconsistofdiscrete,multiplesolitonsthatshiftcontinuouslytolowerenergies.Thenumber
4、ofsolitonsandtheamountthattheyshiftbothincreasewiththelaunchedpower.Allofthedataarequantitativelyconsistentwithsolu-tionsofthenonlinearSchrdingerequation,butonlywhentheRamannonlinearityistreatedwithoutapproxi-mation,andself-steepeningisincluded.Theseres
5、ultsremoveanyambiguityastothenatureofthesemultiplesolitons;theyariseowingtothebreakupofhigh-ordersolitonsinthepresenceofnonlinearprocessesbeyondself-phasemodulation.©2006OpticalSocietyofAmericaOCIScodes:190.5530,060.5530.1.INTRODUCTIONingindurationfrom2
6、0fsto0.8ns,ataveragepowerlev-10Ð14elsofonlyafewmilliwatts.Thelow-thresholdpowersTheincorporationofphotoniccrystalsinopticalÞbermakethissystemattractiveforpotentialapplicationsintechnologyhasopenedupinterestingandactiveresearch151Ð6densewavelength-divisi
7、onmultiplexingandopticalareasinopticalcommunicationsandnonlinearoptics.16metrology.ThesemicrostructuredÞbersconsistofauniformcorere-Thepreciseshapeofthenonlinearlyshiftedoutputgion(typicallyeitherairorsilica)thatissurroundedbyaspectrumvariesfromÞbertoÞb
8、erandisstronglydepen-photoniccrystalcladdinglayerthatmostcommonlycon-dentontheÞberdispersionaswellasthewavelength,sistsofaperiodic,hexagonalarrayofairholesdeÞnedbypower,duration,andchirpoftheinputpulses.Insomesilicawalls.Oneofthe
