This　paper　reports　the　synthesis　of　the　raw　material.　Crystal　growth　and　spectral　properties　of　Tm3+/Yb3+:　GdVO4.　For　polycrystalline　raw　material　of　rare　earth　(Tm3+,　Yb3+)　-doped　GdVO4　were　synthesized　using　liquid-phase　reaction　method　in　pH=7.0-7.5.　The　Tm3+/Yb3+:　GdVO4　crystal　with　the　dimension　Φ30×35mm2　was　obtained　by　the　Czochralski　method.　The　absorption　spectrum　was　measured　at　room　temperature.　According　to　the　Judd-Ofelt　theory　the　parameters　of　oscillator　strengths　Ω　λ　were　calculated:　Ω2=3.86×10　-20cm2,　Ω4=0.65×10　-20cm2,　Ω6=0.73×10　-20cm2.　©　2004　Elsevier　B.V.　All　rights　reserved.