Applying the home made chirped fiber Bragg grating (CFBG) writing system, CFBGs are successfully fabricated and applied in fiber mode-locked oscillator and chirped pulse amplification (CPA) systems. The oscillator can output 19.4 nm bandwidth, 18 mW average power laser, and can be compressed to 143 fs. With pulse stretching, power amplification and compression, 264 fs pulse width can be obtained. The experimental results initially demonstrate the feasibility of the domestic CFBG in femtosecond laser systems.