The shape of pumping laser pulse was reshaped in fiber-garting compression of optical pulse due to the competing between self-phase-modulated and stimulated raman scattering. The salf-phase-modulated power spectra was very asymmtric. We obtained some symmtric spectra produced by salf-phase-modulated in our experiments using a 2 m single-mode polarization-preserving silicon fiber. Some characteristics of Self-Phase-Modulated power spectra are discussed.