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1、May1,2006/Vol.31,No.9/OPTICSLETTERS1247Coherentcombinationofhigh-power,zigzagslablasersG.D.Goodno,H.Komine,S.J.McNaught,S.B.Weiss,S.Redmond,W.Long,R.Simpson,E.C.Cheung,D.Howland,P.Epp,M.Weber,M.McClellan,J.Sollee,andH.InjeyanNorthropGrummanSpaceTechnology,OneSpacePark,R1-1170F,RedondoBeach,Calif
2、ornia90278ReceivedJanuary5,2006;revisedJanuary27,2006;acceptedFebruary2,2006;postedFebruary8,2006(Doc.ID67064)Wedemonstrateascalablearchitectureforahigh-power,high-brightness,solid-statelaserbasedoncoher-entcombinationsofmasteroscillatorpowerampliÞerchains.Acommonmasteroscillatorinjectsasequence
3、ofmultikilowattNd:YAGzigzagslabampliÞers.AdaptiveopticscorrectthewavefrontofeachampliÞedbeamlet.Thebeamletsaretiledsidebysideandactivelyphaselockedtoformasingleoutputbeam.Thelaserproduces19kWwithbeamquality2diffractionlimited.Tothebestofourknowledge,thisisthebrightestcwsolid-statelaserdemonstr
4、atedtodate.©2006OpticalSocietyofAmericaOCIScodes:140.3280,140.3290,140.3530.Scalingsolid-statelaserstohigheraveragepowersachieveveryhighcombinedoutputpowers.Wehavewhilesimultaneouslymaintaininggoodbeamqualitypreviouslyshownthescalabilityofactivephaselock-(BQ)andefÞciencyisimportantforbothindustr
5、ialingatmoderatepowerswithuptofourÞberlasersin6andmilitaryapplications.Athighaveragepowers,parallel.Inthiswork,wedemonstrateascalable,laserbrightnesstendstobelimitedbythermo-opticsolid-statelaserarchitecturebycoherentlycombin-distortionsofthesolid-stategainmedia.Theeffectsingtwohigh-powermastero
6、scillatorpowerampliÞerofthesedistortionscanbemitigatedbythechoiceof(MOPA)chainsbasedonzigzagslabs.thepumpingandextractionarchitecture.ThinThelasersystemarchitectureisshowninFig.1.123Theoutputfromalow-power,single-frequencymas-disks,rods,andzigzagslabshavealldemon-stratednear-diffraction-limitedp
7、owersatoraboveteroscillator(MO)progressesthroughanetworkof1kW,butfurtherscalingofthesesingle-aperturede-1WYb-dopedÞberampliÞers(YDFAs)andsplittersvicescontinuestobelimitedbythermaleffects.toformthree1Wbeamlets.Oneofthesethre
