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　F-4(9/2)　-＞　H-6(13/2).　In　this　work,　Dy3+:　Y(3)A(15)O(12)　(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　mu　W　yellow　laser　operation　were　realized　in　2.0%　Dy:　YAG　crystal.