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1、InvitedPaperHighPowerLaserSourcesforIndustryandtheirApplications*FriedrichBachmann**ROFIN-SINARLaserGmbH,Berzeliusstr.83,D-22113Hamburg,GermanyAbstractDespitetheinventionandavailabilityofawidevarietyoflasersources,onlyveryfewtypeshavemadetheirwayintotheindustrialuse,whichveryoftenrequiresrelia
2、blethreeshiftrunning,highuptimeandlowrunningcosts.OveralongtimetheCO2gaslaserhasdominatedthehighpowermaterialprocessingareaandstillholdswith41.1%thebiggestmarketshareinthatfield.Themostmodern,mostreliableandmostcostefficienttypeofCO2laseristhediffusioncooledslabconfiguration,whichprovidesalmos
3、tdiffractionlimitedbeamqualityandisnowadaysavailableinapowerrangeupto8kW.Theadvantageofsolidstatelasersisthattheirradiationcanbeguidedthroughopticalfibers,buttheysufferedfromhighcostandlowefficiency.Theappearanceofdiodelasersasaveryefficientandreliablepumpingsource,however,hasboostedsolidstate
4、lasertechnology.Notonlythebeamqualityandefficiencyoftheclassicalroddesigncouldbeimprovedbyreplacingbroadbandlampsbymonochromaticdiodelasersbutfurthermore,becauseofthehighbrillianceofthediodelasers,newconceptsasthethindiscandthefiberlasercouldberealized.Especiallythehigherefficiency,reducingthe
5、runningcostinconjunctionwithimprovedbeamqualitymakesthesolidstatelasersthetoolofthefuture,whenever3Dapplicationsareunderconsideration.Keywords:Diodelasers;diodepumpedlasers;disklaser;diffusioncooledCO2laser;CO2slablaser;laserwelding;remotewelding;scannerwelding;lasercutting.1.INTRODUCTIONSince
6、morethan30yearsnowlasersaresuccessfullyemployedinvarious1,2Mrd.€Mio.€Bn€applications.Asprovenbymarketstudies,cuttingisthemostprominentapplication(Fig.1);notonlymetalsarecutbylasers,butalsowood(e.g.fordie-boards),glass4(e.g.forlighttubes),textiles(e.g.forairbags),plastics,rubberandcomposites.cu
7、ttingLaserwelding,thesecondmostimportantapplicationprovidesafastjoining3technologywithminimizedheatloadtotheworkpiecebasedonthedeeppenetrationweldingweldingeffect;laserweldingismainlyrelatedtometals,e.g.gearparts,tailored2markingblanks,
