Fig. 1. SuperKEKB Yb/Nd drive laser system^[15]

Fig. 2. FLASH drive laser system^[28]

Fig. 3. Structure of PULSE^[26]

Fig. 4. Output characteristics of PULSE amplifier^[26]

Fig. 5. Schematic of the pulse picking in PULSE^[26]

Fig. 6. Schematic of the rod fiber amplifier in Cornell ERL drive laser system^[19]

Fig. 7. Output characteristics of the drive laser amplifier at Cornell ERL^[19]

Fig. 8. Green laser output characteristics of Cornell ERL drive laser system^[19]

Fig. 9. Slice emittance of optimized electron bunches for various profiles of photocathode pulses and beam current profiles^[54]

Fig. 10. UV pulse shaping optical scheme at FERMI^[58]

Fig. 11. Temporal intensity distribution of the incident laser and the output laser of incoherent stacking^[17]

Fig. 12. Optical layout of the multiple birefringent crystal shaper used for PULSE^[33]

Fig. 13. Results of both the measured and the calculated pulse profiles after the shaper^[33]

Fig. 14. Beam transport and transverse beam profiles along the beam line at SwissFEL^[30]

Fig. 15. UV laser beam spatial distributions without and with the application of DOE^[15]

Fig. 16. Schematic diagram of 3D shaper of laser pulse intensity distribution based on zero-dispersion compressor and SLM^[65]

Fig. 17. Distribution of a 0.5 nC electron beam generated by 3D-shaped lasers^[54]

Fig. 18. Diffraction efficiency and reflection coefficient of the 3D CBG aperture^[67]

Fig. 19. Injector building layout at EuXFEL^[16]

Fig. 20. Stability of PULSE multiple birefringent crystal shaper with respect to temporal and temperature variations^[33]