High-power XUV beamlines
Sources of short-wavelength radiation, such as synchrotrons or free-electron lasers, have already enabled numerous applications and will facilitate more seminal studies. On the other hand, sources of coherent extreme ultraviolet to soft x-ray radiation via high-harmonic generation (HHG) of ultrashort-pulse lasers have gained significant attention in the last years due to their enormous potential to address a plethora of applications in a cost-effective and tabletop format. Therefore, they constitute a complementary source to large-scale facilities. The photon-flux values obtained by fiber-laser-driven HHG sources can be considered the highest of all laser systems for photon energies between 20 eV – 150 eV. Even higher photon energies up to the soft X-ray regime are feasible using Tm-based driving lasers.
AFS ultrafast fiber lasers are ideal high-harmonic drivers. These turnkey HHG beamlines can address several applications in the EUV to X-ray spectral region.
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|Photon energy||21 eV||90 eV||150 eV|
|Wavelength||59 nm||13 nm||8.5 nm|
|Photon flux per harmonic||up to 1014 s-1||up to 5 × 1010 s-1||up to 1010 s-1|
|Average power per harmonic||up to 330 µW||up to 0.7 µW||up to 0.4 µW|
|Repetition rate||flexible, up to 10 MHz|
|Pulse duration||pulse duration < laser pulse duration i.e. < 30 fs (or shorter)|
|Spectral bandwidth||can remain close to the transform limit with flexible bandwidths (down to < 10 meV)|
|Dimensions of HHG chamber||80 cm × 40 cm × 40 cm|
|Vacuum connections||typically KF-40, can be adapted to customer preferences|
|Additional features||Turnkey reliability, high stability, all parameters software-controlled|
|Add-ons||Single-harmonic selection, separation of XUV radiation and driving radiation|