Two methods were used to shape the spectrum of laser pulse. The birefringent filter of quartz crystal with the certain thickness was inserted into the Ti∶sapphire regenerative amplifier cavity for the regenerative amplifier intre-cavity spectrum shoping by adjusting the optic axis orientation of the crystal. Through the spectrum shaping, the bandwidth of the regeneratively amplified pulse was increased from approximately 20 nm to approximately 35 nm, which is near the bandwidth of the seed pulse. As a comparison, by using a coated filter outside the regenerative amplifier cavity, the bandwidth of the regeneratively amplified pulse was stretched to approximately 28 nm.