title: Photoinjector drive laser of the FLASH FEL.
abstract: The upgraded photoinjector drive laser of the free-electron laser facility FLASH at DESY Hamburg is described in this paper. This laser produces trains of 800 and 2400 ultraviolet picosecond pulses at 1 MHz and 3 MHz repetition rate in the trains, respectively. The amplifying elements of the system are Nd:YLF-rods, which are pumped by fiber-coupled semiconductor diodes. Compared to the flashlamp-pumped photocathode laser previously used at FLASH, the new diode-pumped laser features a better reliability and a significantly improved stability of its pulse parameters.
authors: Max-Born-Institute for Nonlinear Optics and Short Pulse Spectroscopy, Berlin, Germany. will@mbi-berlin.de
authors: Ingo
authors: I
authors: Will
authors: Horst I
authors: HI
authors: Templin
authors: Siegfried
authors: S
authors: Schreiber
authors: Wolfgang
authors: W
authors: Sandner
mesh_terms: D000669:Amplifiers, Electronic; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005336:Fiber Optic Technology / Q000295:instrumentation*; D054023:Lasers, Semiconductor