Abstract

High-order harmonic generation, using high-power, short-pulse lasers has been shown to be an efficient way to generate coherent radiation in the extreme ultraviolet (XUV) and soft X-ray spectral regions. The characteristics of this radiation depends on the specifications of the exciting laser. Using, for example, the Ti:Sapphire laser system in Lund, which produces up to 150 mJ in 150 fs, we can generate very high-order harmonics. However, the pulse width of the generated harmonics is shorter than that of the fundamental, and the spectral width is large: e.g., for the 15 th harmonic, the resolution Δλ/λ, is only a few times 10^-3.

© 1994 Optical Society of America