Abstract
Seeding of free-electron laser by the 13th harmonic of ultrashort-pulsed 800 nm laser light was achieved using a synchronization technique of a spectral decoded EO-sampling, and intense full-coherent light pulses in the extreme ultraviolet wavelength region were generated.
Highlights
Recent advances in ultrashort-pulsed intense laser technologies have enabled us to investigate a variety of non-linear optical processes of atoms and molecules such as multiphoton absorption and tunneling ionization in the visible and near infrared wavelength regions. Such nonlinear processes in the extreme ultraviolet (EUV) wavelength regions have not been explored well, even though characteristic processes associated with ionization and electronic excitation are expected to proceed
Its intensity could become more than two orders of magnitude larger than that of high-order harmonics of ultrashort laser pulses
We found in these cases that sequential and non-sequential ionization processes could compete, and that these processes were influenced largely by the existence of resonance states through the strong coupling with the intense EUV light pulses
Summary
Seeding of free-electron laser by the 13th harmonic of ultrashort-pulsed 800 nm laser light was achieved using a synchronization technique of a spectral decoded EO-sampling, and intense full-coherent light pulses in the extreme ultraviolet wavelength region were generated. Recent advances in ultrashort-pulsed intense laser technologies have enabled us to investigate a variety of non-linear optical processes of atoms and molecules such as multiphoton absorption and tunneling ionization in the visible and near infrared wavelength regions.
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