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
Original Manuscript: August 20, 2001
Revised Manuscript: May 13, 2002
Published: April 20, 2003
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)