In　this　paper,　transparent　Tm3+/Er3+/Yb3+　tri-doped　oxyfluoride　glass　ceramic　samples　containing　LaF3　nanocrystals　were　prepared　by　a　melt　quenching　method,　and　were　subsequently　fabricated　into　transparent　microspheres　with　handles.　A　new　method　to　study　the　luminescent　properties　of　Tm3+/Er3+/Yb3+　tri-doped　oxyfluoride　glass　ceramic　was　proposed,　which　was　using　the　biconical　tapered　fiber-microsphere　coupled　structure.　The　structure　has　characteristics　of　low　excitation　optical　power,　easy　preparation　and　convenient　testing.　We　obtained　strong　white　light　including　the　blue　(471　nm),　green　(523　nm　and　544　nm)　and　red　(651　nm)　emission　under　the　excitation　of　a　976　nm　laser　diode　(LD)　and　the　relationship　of　the　luminous　flux　of　white　light　versus　pump　power　simultaneously.　In　addition,　the　up-conversion　(UC)　luminescence　mechanism　of　rare　earth　(RE)　ions　and　the　reason　of　high　luminescence　efficiency　in　our　experiment　were　also　explained.　The　white　light　obtained　by　UC　of　976　nm　laser　has　more　advantages　than　that　by　down-conversion　of　blue　light.　It　may　be　applied　in　many　fields　such　as　background　light,　lighting,　etc.　©　2014　Elsevier　B.V.　All　rights　reserved.