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The precise characterization of femtosecond laser pulses is as challenging as their generation and a topic of intense research. Dispersion-scan (d-scan) [1] is a recently established technique where the spectrum of a nonlinear signal, e.g., second-harmonic generation (SHG), is measured as a function of dispersion applied to the pulse. The spectral phase of the pulse can then be retrieved from the...
Intense few-to single-cycle pulses are a key tool for attosecond science and ultrafast spectroscopy, and are also enabling a new generation of compact laser-plasma accelerators [1], Achieving such short pulse durations is a challenging task as it requires not only the generation of very broad (potentially over octave-spanning) spectra but also the compensation of the spectral phase over such bandwidths,...
Vector beams are light beams with spatially variant polarization [1]. During the last decade vector beams have become an indispensable tool in many areas of science and technology such as optical trapping, quantum memories, and quantum optics. In particular, radially and azimuthally polarized light beams are the paradigm of vector beams. Radial vector beams are especially interesting due to the non-vanishing...
Integral imaging concept provides a fascinating tool for the capture and display of 3-D images or movies with full parallax, with no need for special glasses and without visual fatigue due to the convergence and accommodation conflict. The limitations and recent advances in integral imaging are discussed.
The temporal characterization of few-cycle pulses is of paramount importance for advanced applications, such as attosecond physics. However, their large bandwidths can pose significant challenge for usual diagnostic techniques. Moreover, the methods for their generation — e.g. hollow-core fiber compression [1] — often lead to spatial inhomogeneities, which are coupled to the temporal/spectral domain...
When a high-power infrared femtosecond pulse is focused into a transparent solid, different non-linear effects such as self-phase modulation, self-steepening, plasma generation or filamentation take place. These effects usually give rise to an extreme spectral broadening of the pulse that is termed supercontinuum (SC) generation [1]. In this contribution we demonstrate the possibility to tailor the...
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