Abstract

We generate the 7th-13th harmonic of ≈800 nm by propagating 30-fs pulses at >10<sup>14</sup>W/cm<sup>2</sup>through a xenon-filled hollow-core PCF. The extremely low HHG threshold of 0.4 µJ would be achievable by multimegahertz solid-state lasers.

© 2009 Optical Society of America

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