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Picosecond laser filamentation in air

Picosecond laser filamentation in air

... 10 picosecond‐long laser pulse, ...the laser beam by thick and dense plasma channel in the middle of the beam surrounded by several smaller plasma ...ps‐long laser pulse propagating ... Voir le document complet

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Picosecond laser filamentation in air

Picosecond laser filamentation in air

... Keywords: laser filamentation, picosecond laser pulses, nonlinear propagation, optical ionization Abstract The propagation of intense picosecond laser pulses in air ... Voir le document complet

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Picosecond Laser Filamentation in Air

Picosecond Laser Filamentation in Air

... Picosecond laser filamentation in air Pavel Polynkin 1 ,Andreas Schmitt‐Sody 2 , Heiko ...2. Air Force Research Laboratory, Albuquerque, New Mexico, USA ... Voir le document complet

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Filamentation Laser Femtoseconde dans l'Air et Application au Guidage de Decharges Electriques et à la Generation de Rayonnement Terahertz

Filamentation Laser Femtoseconde dans l'Air et Application au Guidage de Decharges Electriques et à la Generation de Rayonnement Terahertz

... mesures in situ sont difficilement r´ ealisables, et que sa mod´ elisation par un code num´ erique particulaire s’av` ere quasiment impossible en raison du nombre de parti- cules en jeu et du caract` ere atypique ... Voir le document complet

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Generation of long-lived underdense channels using femtosecond filamentation in air

Generation of long-lived underdense channels using femtosecond filamentation in air

... in air at 800 nm. Once the laser pulse has left, it leaves in its trail a thin column of weakly ionized plasma, which recombines in less than 10 ns ...the laser pulse to the ... Voir le document complet

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Impact of the pump wavelength in THz emissions by two-color femtosecond laser filaments in air

Impact of the pump wavelength in THz emissions by two-color femtosecond laser filaments in air

... extracted in focused propagation geometries, which reproduce experimental measurements of THz pulse energies [Figure ...1(a)]. In contrast, similar scalings cannot be reached in a long-range ... Voir le document complet

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Laser beam self-symmetrization in air in the multifilamentation regime

Laser beam self-symmetrization in air in the multifilamentation regime

... of laser energy and with a decrease of the local refractive ...channel in its wake, surrounded by a laser energy ...Ionization in the atmosphere by filamentation has been reported at a ... Voir le document complet

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Filamentation of ultrashort laser pulses in silica glass and KDP crystals: A comparative study

Filamentation of ultrashort laser pulses in silica glass and KDP crystals: A comparative study

... pulses in silica glass and in ...gaps in silica and KDP, we report significant differences in the ionization rates leading to three times higher clamping intensities in KDP and a longer ... Voir le document complet

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Terahertz Radiation Source in Air Based on Bifilamentation of Femtosecond Laser Pulses

Terahertz Radiation Source in Air Based on Bifilamentation of Femtosecond Laser Pulses

... implications in both fundamental and applied ...propagating in air, due to the presence of water ...femtosecond laser pulse undergoing filamentation emits a strong THz pulse confined ... Voir le document complet

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Recent developments in femtosecond filamentation

Recent developments in femtosecond filamentation

... filaments In 2007, D’Amico et ...femtosecond laser filament in air ...radiated in a hollow-cone structure in the laser propagation direction, with a radial polarization ... Voir le document complet

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Application of femtosecond filamentation in gaseous media

Application of femtosecond filamentation in gaseous media

... femtosecond laser pulses and lamen- tation in air open the way to many atmospheric ...ultrashort laser pulses require a knowledge about the lamentation over long propagation ...created ... Voir le document complet

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Experimental Investigation of Linear Energy Deposition Using Femtosecond Laser Filamentation in a M=3 Supersonic Flow

Experimental Investigation of Linear Energy Deposition Using Femtosecond Laser Filamentation in a M=3 Supersonic Flow

... as in the tests in quiescent air (Figure ...revealed in the zoomed viewed in Figure ...temperature in the heated core, the flow becomes locally subsonic and enables the formation ... Voir le document complet

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Sub-picosecond laser damage growth on high reflective coatings for high power applications

Sub-picosecond laser damage growth on high reflective coatings for high power applications

... consisted in assessing the E-field distribution in a perfect and infinite mirror ...described in Section ...calculation in the damaged structure represented on ...hole in terms of ... Voir le document complet

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Picosecond laser for performance of efficient nonlinear spectroscopy from 10 to 21 mm

Picosecond laser for performance of efficient nonlinear spectroscopy from 10 to 21 mm

... tabletop laser that enables us to perform SFG spectroscopy from 10 to 21 ...The picosecond pump laser consists of a Nd:YAG oscillator mode locked by a frequency-doubling nonlinear mirror combined ... Voir le document complet

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Strong Enhancement of Terahertz Radiation from Laser Filaments in Air by a Static Electric Field

Strong Enhancement of Terahertz Radiation from Laser Filaments in Air by a Static Electric Field

... femtosecond laser pulse propagating in air is the source of a THz radiation emitted in a narrow cone in the forward direction [1, ...left in the wake of the moving ionization ... Voir le document complet

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From physics to application of filamentation in air

From physics to application of filamentation in air

... shown in Figure 5-3(b) ...integration in frequency scale, is about ...because filamentation begins at shorter z, which results in a longer self-guided ...column. In this case, the ... Voir le document complet

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Intensity modulated terahertz vortex wave generation in air plasma by two-color femtosecond laser pulses

Intensity modulated terahertz vortex wave generation in air plasma by two-color femtosecond laser pulses

... usual filamentation dy- namics [ 34 , 35 ...singularity in the .... In contrast, at (z = − 4 mm) the pump pulse has un- dergone severe transverse distortion [see fluency in ...singularities ... Voir le document complet

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Improving supersonic flights with femtosecond laser filamentation

Improving supersonic flights with femtosecond laser filamentation

... the laser in the absence of air flow. In this image, recorded ...the laser shot, one can observe a 10-cm-long central hot channel of low air density generated by the filament and ... Voir le document complet

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Growth of concomitant laser-driven collisionless and resistive electron filamentation instabilities over large spatiotemporal scales

Growth of concomitant laser-driven collisionless and resistive electron filamentation instabilities over large spatiotemporal scales

... current filamentation, thus giving rise to electromagnetic structures such as those sketched in ...2e. In order to investigate the large-scale hot-electron dynamics in a self-consistent way, ... Voir le document complet

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Ultrasound Generated by a Femtoscond and a Picosecond Laser Pulse Near the Ablation Threshold

Ultrasound Generated by a Femtoscond and a Picosecond Laser Pulse Near the Ablation Threshold

... single laser pulses in thin 共50 ␮ m兲 aluminum foils as a function of the laser ...fluence. Laser-pulse durations of 80 fs and 270 ps were used to compare the ultrasound generated in two ... Voir le document complet

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