The　Dy3+:SGB　single　crystal　has　been　successfully　prepared　for　the　first　time　via　the　Czochralski　technique,　of　which　the　optical　features　were　investigated　in　detail.　Based　on　measured　polarized　absorption　spectra,　various　spectral　parameters　were　determined　via　Judd-Ofelt　theory.　The　peak　absorption　cross-sections　at　450　nm　for　the　6H15/2　-＞　4I15/2　transition　of　Dy3+　ions,　are　0.66　x　10-21　cm(2)　for　n-polarization　and　0.59　x　10-21　cm(2)　for　a-polarization　respectively.　The　emission　cross-sections　at　576　nm　are　1.91　x　10-21　cm2　and　1.67　x　10-21　cm2　for　n　and　a　polarizations　accordingly.　Radiative　and　fluorescence　decay　times　of　Dy3+:　F-4(9/2)　level　were　measured　to　be　1.607　ms　and　1.037　ms,　respectively,　and　the　quantum　efficiency　is　64.5%.　All　experimental　results　tell　that　Dy:SGB　could　be　a　potential　candidate　for　direct　LD-pumped　yellow　lasers.