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Title: High current permanent discharges in air induced by femtosecond laser filamentation

Abstract

Filaments created in air by an intense femtosecond laser pulse in the presence of an electric field generate a highly conductive permanent plasma column.

Authors:
; ; ; ; ; ; ; ; ;  [1];  [2];  [2]
  1. Laboratoire d'Optique Appliquee, ENSTA, Ecole Polytechnique, CNRS UMR 7639, 91761 Palaisseau (France)
  2. (France)
Publication Date:
OSTI Identifier:
20971871
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 90; Journal Issue: 17; Other Information: DOI: 10.1063/1.2734396; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; AIR; ELECTRIC CURRENTS; ELECTRIC DISCHARGES; ELECTRIC FIELDS; LASERS; PLASMA; PLASMA PRODUCTION; PULSES

Citation Formats

Houard, A., D'Amico, C., Liu, Y., Andre, Y. B., Franco, M., Prade, B., Mysyrowicz, A., Salmon, E., Pierlot, P., Cleon, L.-M., LASIM, Universite Lyon 1, CNRS UMR 5579, 69622 Villeurbanne, and Agence d'Essai Ferroviaire, SNCF, 21 Av. du President Allende, 94407 Vitry-sur-Seine. High current permanent discharges in air induced by femtosecond laser filamentation. United States: N. p., 2007. Web. doi:10.1063/1.2734396.
Houard, A., D'Amico, C., Liu, Y., Andre, Y. B., Franco, M., Prade, B., Mysyrowicz, A., Salmon, E., Pierlot, P., Cleon, L.-M., LASIM, Universite Lyon 1, CNRS UMR 5579, 69622 Villeurbanne, & Agence d'Essai Ferroviaire, SNCF, 21 Av. du President Allende, 94407 Vitry-sur-Seine. High current permanent discharges in air induced by femtosecond laser filamentation. United States. doi:10.1063/1.2734396.
Houard, A., D'Amico, C., Liu, Y., Andre, Y. B., Franco, M., Prade, B., Mysyrowicz, A., Salmon, E., Pierlot, P., Cleon, L.-M., LASIM, Universite Lyon 1, CNRS UMR 5579, 69622 Villeurbanne, and Agence d'Essai Ferroviaire, SNCF, 21 Av. du President Allende, 94407 Vitry-sur-Seine. Mon . "High current permanent discharges in air induced by femtosecond laser filamentation". United States. doi:10.1063/1.2734396.
@article{osti_20971871,
title = {High current permanent discharges in air induced by femtosecond laser filamentation},
author = {Houard, A. and D'Amico, C. and Liu, Y. and Andre, Y. B. and Franco, M. and Prade, B. and Mysyrowicz, A. and Salmon, E. and Pierlot, P. and Cleon, L.-M. and LASIM, Universite Lyon 1, CNRS UMR 5579, 69622 Villeurbanne and Agence d'Essai Ferroviaire, SNCF, 21 Av. du President Allende, 94407 Vitry-sur-Seine},
abstractNote = {Filaments created in air by an intense femtosecond laser pulse in the presence of an electric field generate a highly conductive permanent plasma column.},
doi = {10.1063/1.2734396},
journal = {Applied Physics Letters},
number = 17,
volume = 90,
place = {United States},
year = {Mon Apr 23 00:00:00 EDT 2007},
month = {Mon Apr 23 00:00:00 EDT 2007}
}
  • The possibility of controlling the processes of filamentation and generation of a supercontinuum during propagation of a high-power femtosecond laser pulse in air is investigated. Using a numerical simulation, it is shown that the initial phase modulation of the pulse results in a shift of the beginning of the filament from the output aperture of the laser system and in a significant increase in the filament length. The efficiency of the generation of the short-wavelength part of the supercontinuum in a pulse with a negative phase modulation is more than two orders of magnitude higher than for a pulse withmore » a limited spectrum. (nonlinear optical phenomena)« less
  • We experimentally investigated the dynamic behavior of remote terahertz (THz) generation from two-color femtosecond laser-induced filamentation in air. A record-high THz pulse energy of 570 nJ at frequency below 5.5 THz was measured by optimizing the pump parameters at a controllable remote distance of 16 m, while super-broadband THz (<300 THz) pulse energy was up to 2.8 {mu}J. A further energy-scaling possibility was proposed. By analyzing simultaneously the fluorescence from both neutral N{sub 2} and N{sub 2}{sup +} in the filament, we found that the enhancement of THz radiation was due principally to guiding of the weak second-harmonic pulse insidemore » the filament of the first strong fundamental pulse.« less
  • Filamentation induced by collinear femtosecond double pulses with different wavelengths (400 nm + 800 nm) in air is investigated by measuring the filament spectra along the propagation axis. By changing their energies and the time delay between them, the role of each pulse in the filamentation is investigated. Though the two pulses do not overlap in time, the filament generated by the previous pulse will interact with the latter one, thus affecting the filamentation process. Each pulse plays a different role when the time delay and input energy are different: As the energy of the 800 nm pulse is relative high (∼600 μJ), the 400 nm pulsemore » has inhibitory and supplementary effects on the filament generated by the 800 nm one as it is prior to and behind the 800 nm one, respectively, which ultimately influences the filament length and strength; however, as energy of the 800 nm pulse decreases to 340 μJ, the filament mainly results from the 400 nm pulse and the 800 nm one just plays an auxiliary role. This study provides an effective way to control filamentation.« less
  • We attribute a strong forward directed THz emission from femtosecond laser filaments in air to a transition-Cherenkov emission from the plasma space charge moving behind the ionization front at light velocity. Distant targets can be easily irradiated by this new source of THz radiation.
  • An impulsive, femtosecond filament-based Raman technique producing high quality Raman spectra over a broad spectral range (1554.7-4155 cm{sup -1}) is presented. The temperature of gas phase molecules can be measured by temporally resolving the dispersion of impulsively excited vibrational wave packets. Application to laser-induced filamentation in air reveals that the initial rovibrational temperature is 300 K for both N{sub 2} and O{sub 2}. The temperature-dependent wave-packet dynamics are interpreted using an analytic anharmonic oscillator model. The wave packets reveal a 1/e dispersion time of 3.9 ps for N{sub 2} and 2.8 ps for O{sub 2}. Pulse self-compression of temporal featuresmore » to 8 fs within the filament is directly measured by impulsive vibrational excitation of H{sub 2}.« less