Generation and Amplification of Temporally "Square" Optical Pulses for the FEL Photoelectric Injector Remelius, D. K. ; Busch, G. E. ; Nguyen, D. C. ; Sheffield, R. L. ; Watkins, D. E. ; Wenzel, R. G. Abstract Publication: 1989 IEEE Particle Accelerator Conference Pub Date: 1989 Bibcode: 1989pac..conf..337R