In　recent　years,　yellow　laser　crystals　have　raised　great　attentions　owing　to　their　comprehensive　applications　in　the　fields　such　as　laser　display,　laser　medical　treatment,　light　detection　and　ranging　(LIDAR),　Bose-Einstein　condensates,　and　atomic　cooling　and　trapping.　With　the　development　of　commercial　blue　light　LD,　the　direct　pumping　of　Dy3+　doped　laser　crystals　has　realized　yellow　laser　based　on　its　transition　4F9/2→6H13/2.　In　this　work,　Dy3+:　Y3Al5O12　(Dy:　YAG)　crystals　with　0.5%,　1.0%,　2.0%,　3.0%,　and　4.0%　(atomic　fraction)　nominal　concentration　of　Dy3+　were　grown　using　Czochralski　method,　the　reason　of　crystal　crack　was　discussed.　Based　on　Judd-Ofelt　(J-O)　theory,　the　J-O　intensity　parameters　and　utilization,　and　other　laser　parameters　of　Dy:　YAG　crystals　with　different　doping　concentrations　were　evaluated.　The　effect　of　the　doping　concentration　of　Dy3+　on　the　spectroscopic　performances　like　fluorescence　branching　ratio,　stimulated　emission　cross-section,　quantum　efficiency,　were　analyzed　comprehensively.　Among　all　the　five　crystals,　1.0%　Dy:　YAG　has　the　largest　stimulated　emission　cross-section　for　582　nm　yellow　emission,　an　intense　fluorescence　intensity　with　the　447　nm　excitation,　and　a　longer　decay　time　of　0.823　ms.　The　fluorescence　intensity　and　stimulated　emission　cross-section　of　2.0%　Dy:　YAG　are　slightly　less　than　that　of　1.0%　Dy:　YAG,　but　the　former　has　a　higher　absorption　coefficient.　Hence,　the　spectroscopic　analysis　results　show　that　1.0%　and　2.0%　are　the　suitable　concentrations　of　Dy3+　ion　in　YAG　crystal　for　yellow　laser　operation　by　diode　pumping.　The　continuous　wave　laser　with　peak　at　582.5　nm　and　the　maximum　output　power　of　166.8　μW　yellow　laser　operation　were　realized　in　2.0%　Dy:　YAG　crystal.　©　2023　Science　Press.　All　rights　reserved.