The influence of stimulated Raman scattering (SRS) on high-power (peak power ~1 000 W) pulse with a pulse-width of ~1 ns propagating in a single-mode fiber is investigated numerically by solving coupled nonlinear Schrdinger equations including Raman gain,pump depletion,self-phase modulation,cross-phase modulation and group velocity dispersion.The evolution of input pulse and Stokes pulse is analyzed,and suppression of SRS using large mode area fiber is shown.The results show that SRS can be suppressed effectively when using photonic crystal fiber (PCF) as transmission medium for inertial confined fusion (ICF).Compared to conventional single-mode fiber,the signal loss is smaller,and the central-dip in output pulse is lower.