We utilize the dispersion property of an X-ray filter material for the generation of a single sub-50-as pulse from high-order harmonics. The attosecond pulse, formed by selecting the spectral range of high-order harmonic radiation, contains an intrinsic chirp corresponding to the quadratic phase variation during a half cycle of a laser pulse. We show that this chirp can be compensated by using the negative group-delay dispersion of a thin X-ray filter, compressing the attosecond pulse down to sub-50-as.
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Date
Compression of harmonie pulses by using material dispersion
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Abstract
2004
Description
Keywords
Coherent light, Computational methods, Dispersions, Harmonic generation, Ionization, Laser mode locking, Materials science, Photons, Attosecond pulses, Harmonic radiation, Time-dependent Schrödinger equations (TDSE), X-ray filters, Fiber lasers
Citation
Applied Physics B: Lasers and Optics, 2004, 79, 5, pp. 563-567