Using　a　picosecond　pulse　laser　seed　source　with　nonlinear　frequency　component,　the　laser　with　nonlinear　fiber　amplifier　is　constructed　to　directly　produce　supercontinuum.　The　problem　of　reverse　light　in　nonlinear　amplification　is　effectively　solved.　In　the　experiment,　SESAM　passively　mode-locked　picosecond　pulse　is　used　to　achieve　first-stage　Stokes　frequency　extension　through　two-stage　amplification.　Finally,　the　third-stage　nonlinear　fiber　amplifier　is　used　to　achieve　the　supercontinuum　output　with　the　wavelength　coverage　range　of　950　~　1650nm,　flatness　of　10dB　and　output　power　of　56W.　©　2023　SPIE.