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The absorption of a single XUV photon by a complex molecule such as a PAH (Polycyclic Aromatic Hydrocarbons) can induce diverse mechanisms that can take place in a broad variety of timescales starting from the attosecond one [1], Nowadays the development of the high harmonic generation (HHG) technology allows synthesizing light pulses in the VUV-XUV spectral range, with duration down to a few tens...
We developed a compact XUV beamline based on High order Harmonic Generation in gases (HHG) that can be used both for time resolved studies with broadband XUV pulses and for spectrally resolved studies where individual harmonics are selected. The beamline operates with a commercial femtosecond laser system at 5 kHz and it is coupled to a velocity map imaging (VMI) spectrometer operating with a high...
Wavefront aberrations play a major role when focusing an ultrashort laser pulse to a high-quality focal spot. Here, we report a novel method to measure and correct wavefront aberrations of a 30-fs pulsed laser beam. The method only requires a programmable liquid-crystal spatial light modulator and a camera. Wavefront retrieval is based on pupil segmentation with an annular lens array, which allows...
Pulse-shaping technology has been acknowledged as a convenient framework for synthesizing user-defined temporal waveforms. In this context, compact, dynamic, user-friendly and fast-operation devices demanded in photonics, quantum dynamics, or ultrafast telecommunications have inspired researchers to look for simple pulse-shaper designs. In this contribution, we experimentally demonstrate pulse shaping...
We make a review of our main results in the field of femtosecond pulses diffracted by diffractive optical elements (DOEs). These results show how amplitude and/or phase DOEs can be used to change the spectral and temporal characteristics of the diffracted pulses. We experimentally demonstrate that shaped pulses diffracted by DOEs are useful in nonlinear optics or chemical applications.
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