In　this　paper,　a　Dy3+:Ca2Al2SiO7　single　crystal　was　grown　successfully　by　the　Czochralski　technique.　The　effective　segregation　coefficient　of　Dy3+　ions　in　Dy3+:Ca2Al2SiO7　crystal　was　measured　to　be　1.12.　The　crystal＇s　spectroscopic　properties　were　investigated　in　detail.　The　absorption　cross　sections　at　452　nm　are　1.03　×　10−21　cm2,　and　0.98　×　10−21　cm2　with　the　full　width　at　half　maximum　10.79　and　4.89　nm　for　π-　and　σ-polarizations,　respectively.　Based　on　the　Judd-Ofelt　theory,　the　radiative　transition　probabilities,　fluorescence　branching　ratios,　and　radiative　lifetime　of　Dy3+:Ca2Al2SiO7　crystal　were　obtained.　The　emission　cross　sections　at　574　nm　are　13.82　×　10−21　cm2,　and　8.33　×　10−21　cm2　for　π-　and　σ-polarizations,　respectively.　The　fluorescence　decay　time　of　4F9/2　multiplet　is　334.9　μs,　and　the　fluorescence　quantum　efficiency　is　58.6%.　These　results　show　that　Dy3+:Ca2Al2SiO7　crystal　is　a　promising　yellow　laser　material　suitable　for　commercial　450　nm　blue　laser　diode　pumping.　©　2022　Elsevier　B.V.