The　transparent　and　homogeneous　RE:YVO4　crystals　have　been　grown　by　Czochralski　method.　The　room　temperature　absorption　spectra　have　been　measured.　The　spectroscopic　properties　have　been　studied　for　rare　earth-doped　(Tm3+,　Er3+,　Yb3+)RE:　YVO4.　According　to　Judd-Ofelt　theory,　the　spectral　strength　parameters:　Omega(2)　=　1.13　x　10(-20)　cm(2),　Omega(4)　=　1.63　x　10(-20)　cm(2)　and　Omega　=　0.65　x　10(-20)　cm(2)　of　Er3+　ion　have　been　fitted,　and　the　radiative　transtition　probabilities　A(JJ＇),　oscillator　strengths　f(JJ＇),　and　radiative　lifetime　tau　have　been　calculated.　We　report　the　results　of　cross　energy　transfer　processes　between　Tm3+　and　Yb3+　ions,　and　the　sensitization　between　Tm3+　and　Er3+　ions.