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©1994-2009ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(1.,435002;2.,430074):,:;;;:TN305.7ProgressinFemtosecondLaserPulsePreciseFabricationLongPeriodFiberGratingJiangChao1,WangYouqing2(1.HubeiNormalUniversity,Huangshi435002,China;2.HuazhongUniversityofScienceandTechnology,Wuhan430074,China)Abstract:Thesebasicmethodsoflongperiodfibergratings(LPFG)fabricatedbyfemtoscondlaserareintroduced.ThemainmechanismsoffemtosecondlaserinscriptionLPFGarediscussed.ThecharacteristicsofLPFGbydifferentwavelengthfemtosecondlaserpoint2by2pointinscriptionarede2scribedindetailandtheresearchprogressuptotheminuteisalsointroduced.Finally,thenaturesofLPFGinscribedbyfemtosecondlaseraresummarizedandtheLPFGapplicationsarereviewed.Keywords:femtosecondlaser;LPEG;photochemicalreaction;point2by2pointinscription,:();(longperiodfibergrating,LPFG),1001000m1978[1],1996,VengsarkarLPFG[2],LPFG:LPFG,[3];LPFG(:)[2,4]:2008-01-31:(D20062202);[2003-7];2005[37]:,,1969,LPFG,,;,LPFG:,CO2(2)[5];[6][7,8]LPFG1LPFG720083©1994-2009ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(248193nm)LPFG,,157nm,,,1LPFG,,()(),MWGW,(),,,264nm211nm264nm9.4eV,,211nm,11.8eV,,800nm(7.8eV7.1eV);400nm352nm,,LPFG(9.3610.6eV7.1eV),,,,,,,,2,,,,,,,:2LPFG,LPFG,,820083©1994-2009ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.[7,8],LPFG2.1LPFGKondoLPFG,2[9](Ti:Al2O3,120fs,800nm,200kHz),,CCDXZY,,,,6mm,2m3m2LPFGLPFG10-2,,,[9],LPFG,XZ,,,,,LPFG3,,,(2040),,CCD(),LPFG,,,4CCD4aZ,,(Z=60m),(Y),Z60m,X,4b,1m,,,,(),LPFG,LPFG,500500,,500,,,,,2.2LPFG920083©1994-2009ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.[10,11],800nm,513172.25kPa10024h,,,,LPFG,20dB,800nm,,(800nm400nm),4,2,400nm193nm,5400nmLPFG,400nm193nm2.3LPFGTwinkle(1055nm)543211264352nm,LPFG[1216],6,,,,LPFG6LPFG,264nmLPFG[12,13],24dBLPFG,,LPFG264nmLPFG2,1264nm(248nm157nm)LPFG1,LPFG,,1SMF228LPFG[12,13]/nm/(GWcm-2)/dB/(Jcm-2)/nm/nm/m2480.021713001464503041570.00022151594443042644702438148723460352nmLPFG30dB[14],LPFG,,:,CO2LPFG[5];LPFGLPFG,,LPFG2,[14],,,LPFG[5]211nmSMF228(B)0120083©1994-2009ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.[15],211nmLPFG248nm,(45)LPFG,:,2352264nm211nmLPFG[16](352nm30dB)352nmLPFG(3dB)[16]:LPFG,,2SMF228LPFG[1216]/nm/(GWcm-2)/(Jcm-2)/dB/nm/nm/m35210901973014504530026447038241487233002111253225143423300,LPFG,,,,3LPFGLPFG,1996VengsarkarLPFG[9]2:;LPFG,,,,,LPFG7,,,,7LPFG,,,(),,,4LPFG:LPFG(),LPFG,LPFG,:,LPFG,:[1]HillKO,FujiiF,JohnsonDC,etal.Photosensitivityonopticalfibrewaveguides:applicationtoreflectionfilterfabrication[J].Appl.Phys.Lett,1978,32:647-649.[2]VengsarkarAM,LemairePJ,JudkinsJB,etal.Longperiodfibergratingsasbandrejectionfilters[J].JournalofLightwaveTechnology,1996,14(1):58-65.(15)1120083©1994-2009ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.[4]TieslerN,EngelU.GeigerMlformingofmicroparts2effectsofminiaturizationonfrictionl[C]//Proceedingsofthe6thICTP.Berlin,1999:19-24.[5]GeigerM,EcksteinR.Microformingadvancedtechnologyofplasticity[C]//Proceedingsofthe7thICTP.Yokohama,2002:327-338.[6]TieslerN,EngelU.GeigerMlbasicresearchoncoldforgingofmicroparts[C]//Proceedingsofthe7thICTP.Yokohama,2002:379-384.[7]KalsR,VollertsenF.GeigerMlscalingeffectsinsheetmetalforming[C]//Proceedingsofthefourthinternationalconferenceofsheetmetal(SheMet).Enschede,1996:65-75.[8]ErhardtR.ScheppFlmicroformingwithlocalheatingbylaserir2radiationinTransparentTool[C]//Proceedingofthe7thInt1conflonsheetmetall.Bamberg,1999:497-504.[9]SaotomeY,YasudaK,KagaH.Microdeepdrawabilityofverythinsheetsteels[J].JournalofMaterialsProcessingTechnology,2001,113:641-647.[10]ChanKC,WangSH.Thegrainshapedependenceofspring2backofintergratedcircuitleadframes[J].MaterialsScienceandEngineering,1999,323-329.[11]ChanKC,WangSH.Theoreticalanalysisofspringbackinbendingofintegratedcircuitleadframes[J].JournalofMaterialsProcessingTechnology,1999,91:111-115.[12]CheungCF,LeeWB,ChinWM.Investigationoftoolwearinthedam2barcuttingofintergratedcircuitpackages[J].Wear,2000,237(2):274-282.[13]GeigerM,KleinerM,EcksteinR,etal.Microforming[J].AnnalsoftheCIRP,2001,50:445-462.[14]IkeH,PlancakM.Controllingmetalflowofsurfacemicrogeom2etryinconingprocess[C]//Proceedingsofthe6thICTP.Berlin:1999.[15]JooBY,OhSI,JeonBH.Developmentofmicropunchingsystem[J].AnnalsoftheCIRP,2001,50(1):191-194.[16]JooBY,OhSI,JeonBH.Developmentofmicropunchingsystem[J].AnnalsoftheCIRP,2001,50(1):191-194.[17]KurimotoS,HirotaK,NakonoY,etal.Improvementofultra2finepiercingbymeansofvacuumsystem[J].AdvancedTech2nologyofPlasticity(2002),Proceedingsofthe7thICTP.Yokohama,2002,(1):391-396.[18]DoegeE,LiesenerT,StraerD.Dynamictoolbehaviourinmi2crostamping[C]//Proceedingsofthe6thICTP.Berlin:1999,993-938.[19]JimmaT,SekineF.SaotoA1Influenceofdynamicbehaviourofprogressivedie[J].JournaloftheJSTP,1990(31)[20]SaotomeY,IwazakiH.Superplasticextrusionofmicrogearshaftof10min