We　demonstrate　a　high-power　all-fiber　polarizationmaintaining　near-infrared　supercontinuum　laser.　The　system　includes　oscillator,　stretcher　and　four-stage　amplifiers　which　are　built　entirely　based　on　PM　commercial　silica　fibers　and　devices.　The　PM　oscillator　of　system　is　a　mode-locked　fiber　laser　based　on　nonlinear　amplified　loop　mirror　mechanism　generating　pulses　with　an　average　output　power　and　a　repetition　rate　of　1.2　mW　and　42.2　MHz　respectively.　After　pulse　broadening　by　a　150　m　long　PM　dispersion　compensating　fiber,　the　seed　pulse　laser　is　gradually　delivered　into　the　four-stage　PM　power　amplifier　for　power　boost.　The　SC　is　generated　in　the　main　amplifier　without　the　need　for　additional　nonlinear　stage.　The　SC　emission　is　characterized　between　1524　nm　and　1693　nm　with　the　average　power　of　31.6　W,　showing　the　flat　spectrum　with　15　dB　uniformity　was　obtained　at　1544-1668　nm　wavelength　region.　The　laser　source　delivers　near-infrared　SC　from　an　entirely　fiberized,　fusion　spliced　system　without　any　free-space　optics,　which　can　provide　robust　and　stable　SC　generation.　©　2024　IEEE.