Abstract

A chirped pulse amplification laser with zigzag slab Nd:glass amplifiers dedicated to x-ray laser research is described. The laser provides a 1.6 ps duration pulse with $\sim 7\text{\hspace{0.17em} J}$ energy at a repetition rate of $0.1\mathrm{Hz}$. In the power amplifier system, laser light is amplified in a two-step manner: The first step is image-relayed multipass amplification up to $\sim 1\text{\hspace{0.17em} J}$ with a $10\mathrm{mm}\times 10\mathrm{mm}$ beam. The second step is double-pass amplification up to $>10\text{\hspace{0.17em} J}$ with a $10\mathrm{mm}\times 90\mathrm{mm}$ beam. By using this laser system, the saturated amplification of the Ni-like Ag laser at a wavelength of $13.9\mathrm{nm}$ has been successfully demonstrated.

© 2007 Optical Society of America

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