In　this　work,　we　present　an　all-fiber　structured　parametric　oscillator　capable　of　directly　generating　pulses　within　the　900　nm　wavelength　range.　Leveraging　the　four-wave　mixing　effect　within　photonic　crystal　fibers,　the　oscillator　converts　the　1030　nm　pump　light　into　two　distinct　sidebands　centered　at　900　nm　and　1250　nm.　Employing　time-dispersion-tuning　techniques,　we　achieved　a　remarkable　continuously　tunable　wavelength　range　spanning　60　nm,　from　865　nm　to　925　nm.　These　pulses　exhibited　a　pulse　width　of　3.2　ps　and　a　peak　power　of　500　W　at　900　nm,　with　a　repetition　rate　of　30.6　MHz.