In this work, we demonstrate an erbium-doped fiber ring-cavity laser using a multi-functional LPFG. The incorporation of an intra-cavity LPFG offers unique advantages, functioning simultaneously as an all-fiber polarization-selective element and wavelength-selective element. This LPFG-based ultrafast fiber laser configuration not only produces stable pulse output by adjusting the polarization state but also enables easy manipulation of the laser operation wavelength through thermal tuning of the LPFG within the cavity.