It is known that the laser system, including a drive laser and a seed laser plays an important role in the externally-seeded free electron laser. In this paper, the design and layout of the drive laser and seed laser system of Shanghai Soft X-ray Free Electron Laser Facility (SXFEL) will be detailed introduced. Both two lasers employ the commercial laser amplifiers and home-made third harmonic generation devices to generate the ultraviolet laser pulse. Also, the pulse stretcher and image transmitted module are used to control the temporal and spatial distributions.
We describe the photo-injector drive laser system for the Shanghai high-repetition-rate XFEL and Extreme light facility (SHINE). A fiber chirped pule amplification system is designed to produce high-repetition-rate high-energy infrared picosecond pulses and a subsequent fourth-harmonic generation system is employed to produce deep ultraviolet picosecond pulses. The latest development on key performance parameters of 1 MHz, infrared and deep ultraviolet picosecond pulses for the SHINE photo-injector drive laser system will be presented.
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