A two-beam chirped-pulse-amplification Nd:glass laser system dedicated to x-ray laser research is described. Each beam provides an output energy of 20 J with a typical pulse duration of 1.3 ps. A prepulse of variable duration is generated by use of a novel, to our knowledge, optical system. A reflection optical system, comprised of an off-axis parabolic mirror and a spherical mirror, produces a line focus with 6-mm length and 15-μm width without chromatic aberration. By use of this pumping laser system, the nickel-like silver x-ray laser at a wavelength of 13.9 nm has been demonstrated.
© 2003 Optical Society of America
Tetsuya Kawachi, Masataka Kado, Momoko Tanaka, Noboru Hasegawa, Keisuke Nagashima, Kouta Sukegawa, Peixiang Lu, Kenjiro Takahashi, Sinichi Namba, Masato Koike, Akira Nagashima, and Yoshiaki Kato, "Development of a Pumping Laser System for X-ray Laser Research," Appl. Opt. 42, 2198-2205 (2003)