[PDF] Top 20 Coherent Secondary Radiation from Femtosecond Laser Filaments

... Terahertz radiation from fem- tosecond laser filaments in air As discussed in Chapter 5 , the THz radiation from a femtosecond laser filament is produced by the ... Voir le document complet

... harmonic femtosecond laser fields, providing a sawtooth- like ...available femtosecond laser pulses at 800 ...THz radiation amplitude produced in air with this phase-optimized ... Voir le document complet

... applications, from supercontinuum generation to lightning control ...air, femtosecond filaments result from the self-focusing of ultrashort light pulses that couple to their own plasma channel ... Voir le document complet

... two femtosecond IR laser pulses separated by less than 5 ns, forming two overlapping filaments in ...THz radiation from the double pulse is larger by more than one order of magnitude ... Voir le document complet

... parallel filaments in the presence of a transverse ...a femtosecond laser system delivering 40 fs pulses with energy up to 15 mJ at 800 nm was ...separated filaments in ambient air. The ... Voir le document complet

... the laser pulse. However, the important difference is the predicted coherent and nonlocal nature of the emission, which defines its good directivity and a relatively high radiated ...emission from ... Voir le document complet

... THz radiation in ionized gases have been ...driving laser pulse, which can be single or multi- ...or radiation pressure sources [ 12 ...for femtosecond (fs) filaments in [ 13 , 26 ], ... Voir le document complet

... two-color femtosecond filaments in air using pump wavelengths λ 0 from ...long filaments created by a ...the laser-to-THz conversion efficiency exceeds the percent ...longer ... Voir le document complet

... the radiation pattern since it gives a clue about the origin of the ...the radiation pattern observed in the THz range, except that the angle of aperture is considerably larger ...particular ... Voir le document complet

... Russia * ondrej.hort@eli-beams.eu Abstract: Extreme ultraviolet (XUV) radiation finds numerous applications in spectroscopy. When the XUV light is generated via high-order harmonic generation (HHG), it may be ... Voir le document complet

... Fig 1: (left) Far field pattern in linear regime, (center) far field pattern in nonlinear regime, (right) Autocorrelation functions of the combined, compressed beams for both regimes. Then, the pulse peak power is ... Voir le document complet

... Fig. 2 ] compares well with the PE intensity measured at normal emission (open circles). The best agreement is obtained for a theoretical laser intensity of 400 GW/cm 2 . This value is moderately higher than the ... Voir le document complet

... the laser operated and the backward detection configuration, a relatively weak SHG signal was ...the laser beam emitted by the ...optimized laser conditions comparable to those found with many ... Voir le document complet

... plasma filaments formed by ultrashort laser pulses are particularly attractive for this purpose because of their ability to produce linear energy deposition over distances ranging from centimeters to ... Voir le document complet

... crystal. The pump source was a fiber-coupled laser diode with a 200-mm fiber core diameter and a nu- merical aperture (NA) of 0.22 that emitted as much as 15 W of power near 979 nm at maximum power. The broad ... Voir le document complet

... Figure 1: Laser-to-THz conversion efficiency from the local-current model using the two input fluences (a) 5 and (b) 10 J/cm 2 . Dotted gray curves are fits in λ α 0 . (c) THz energies numerically computed ... Voir le document complet

... curvature around 0.23 mm -1 for a reversible actuation. Maximum peak force of 2040 mN is measured from a single nylon beam (with length of 43 mm, width of 1.8 mm, and thickness of 1 mm) at a step input voltage of ... Voir le document complet

... The sinusoidal magnetic field of a few kG perturbs the electron orbit with a wiggle in the horizontal beam plane ( x-z plane ). The pondermotive force accelerates the[r] ... Voir le document complet

... are evaluated at room temperature. By solving Eq. (3), the lattice temperature evolution of the material irradiated by a fs pulse train is obtained. If the thermal diffusion process in Eq. (3) is slower than the heating ... Voir le document complet

... We also performed theoretical simulations of thermal effects during laser irradiation. The numerical model is based on nonlinear light absorption in the presence of intense optical fields, nonlinear propagation ... Voir le document complet