Cooperative　luminescence,　down-conversion　laser　oscillation　and　cascaded　Raman　laser　in　Yb3+-doped　55.93P2O5-　3.57Al2O3-15Na2CO3-20SiO2　phosphosilicate　glass　are　studied　in　the　biconical　fiber-microsphere　coupling　system　in　this　paper.　A　single-mode　semiconducter　laser　with　the　center　wavelength　at　976　nm　and　line-width　0.15　nm　is　used　as　a　pump　source.　The　blue-shifted　cooperative　luminescence　centered　at　476.1　nm　is　obtained　in　the　Yb3+-doped　phosphosilicate　microsphere.　And　a　suitable　model　may　be　applied　to　explain　the　reason　for　the　11.9　nm　blue-shift　in　this　process.　Meanwhile,　the　single-mode　laser　(at　1058.26　nm)　and　multimode　laser　oscillations　(from　1060.02　to　1126.08　nm)　have　also　been　obtained　as　the　result　of　resonant　oscillation　in　microsphere　cavity.　In　addition,　for　the　first　time　so　far　as　we　know　a　self-stimulated　cascaded　Raman　laser　is　observed　in　the　same　phosphosilicate　microsphere,　which　is　generated　by　the　down-conversion　laser　of　Yb3+.　When　the　pump　power　is　8.53　mW,　a　two-order　cascade　Raman　laser　is　generated,　which　extends　the　laser　wavelength　to　near　1300　nm.　©　2014　Chinese　Physical　Society.