A supercontinuum(SC) source based on tri-stage MOPA configuration picosecond fiber laser pumping a 30 m-long home-made photonic crystal is reported.The system is all fiber,and a stable supercontinuum source with maximum power of 5 W at input power of 19 W is demonstrated by carefully adjusting the splicing parameter although the mode fields of the photonic crystal fiber and single mode fiber mismatch.The optical-optical conversion efficiency is 24%.The output energy is well confined in the fiber...