Generation of 10-μJ coherent extreme-ultraviolet light by use of high-order harmonics

We demonstrate the generation of 10-muJ coherent extreme-ultraviolet (XUV) light at wavelengths from 73.6 to 42.6 nm, using high-order harmonics. The peak power of this coherent XUV light is estimated to be 0.13 GW at 62.3 nm, and the peak brightness achieved was 3 X 10(28) photons/(mm(2) mrad(2) s). To our knowledge, this XUV energy is the highest value achieved with high-order harmonics. (C) 2002 Optical Society of America.