Abstract
7-fs-pulses with 0.3 mJ are obtained after filamentation in argon and compression by double-chirped-mirrors. These pulses are used to generate high-order harmonics in a semi-infinite gas cell in different noble gases. Spectral broadening of high-order harmonics in xenon and argon is observed. In neon, an extended continuous cut-off region down to 10 nm (124 eV) is observed which is to the best of our knowledge the highest cut-off energy obtained by filamented pulses. Our result suggests the feasibility of single attosecond-pulse-generation at both high photon flux and high cut-off energy.
Highlights
We present high-order harmonic generation (HHG) in a semi-infinite gas cell from filamented pulses
The 30-fs-pulses from a CPA-lasersystem with pulse energy of 1.2 mJ, a repetition rate of 3 kHz and a central wavelength of 776 nm are spectrally broadened in a filament and compressed down to 7 fs
DCM2 abrupt transition to vacuum spectra is measured for argon, xenon, and neon
Summary
We present high-order harmonic generation (HHG) in a semi-infinite gas cell from filamented pulses. The 30-fs-pulses from a CPA-lasersystem with pulse energy of 1.2 mJ, a repetition rate of 3 kHz and a central wavelength of 776 nm are spectrally broadened in a filament and compressed down to 7 fs.
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