简介：Opticalcouplingbehaviorandassociatedeffectsintwo-dimensionalimplant-definedcoherentlycoupledverticalcavitysurface-emittinglaser(VCSEL)arraysarestudiedviabothexperimentsandtheoreticalcalculations.Experimentsshowthatopticalcouplingbetweenarrayelementscanenhancethearray’soutputpower.Additionally,opticalcouplingvialeakyopticalfieldscanprovideextraopticalgainforthearrayelements,whichcanthenreducethethresholdsoftheseelements.Elementscanevenbepumpedwithoutcurrentinjectiontoemitlightbyreceivingastrongleakyopticalfieldfromotherarrayelements.Opticalcouplingcanalsocauseunusualphenomena:thecentralelementsinlarge-areacoherentlycoupledVCSELarraysthatlasepriortotheouterelementswhenthearraysarebiased,ortheaverageinjectioncurrentrequiredforeachelementtolase,whichismuchlowerthanthethresholdforasingleVCSEL.Theoreticalcalculationsareperformedtoexplaintheexperimentalresults.