Connet's picosecond pulsed Ytterbium-doped fiber laser adopts an all-fiber design. It is a fully polarization maintaining fiber laser based on SESAM passive mode-locking. It achieves a stable linearly polarized picosecond laser output through an optimized design of the optical path. The product has high reliability and maintenance free. The laser can be used for scientific research or as a seed laser for high-power industrial ultra-fast pulse lasers.