Share Email Print
cover

Proceedings Paper

Propagation of femtosecond filaments in atmospheric conditions
Author(s): Noëlle Lascoux; R. Ackermann; Guillaume Méjean; Estelle Salmon; Jérôme Kasparian; Jin Yu; Steffen Frey; R. Salamé; Jean-Pierre Wolf
Format Member Price Non-Member Price
PDF $14.40 $18.00

Paper Abstract

The initiation and propagation of a filament generated by ultrashort laser pulses in both fog and turbulent air is investigated experimentally. Filaments can propagate through dense fog, supported by the surrounding photon bath, which is transmitted and re-feeds the filament after he diffracts on a water droplet. Filaments can can also be generated and propagated even after the beam has propagated through strongly turbulent regions, with structure parameters Cn2 up to 5 orders of magnitude larger than encountered in usual atmospheric conditions. Moreover, the filament position within the beam is not affected by the interaction with a turbulent region. This remarkable stability is allowed by the strong Kerr refractive index gradients generated within the filament, which exceed the turbulence-induced refractive index gradients by 2 orders of magnitude.

Paper Details

Date Published: 9 July 2007
PDF: 8 pages
Proc. SPIE 6733, International Conference on Lasers, Applications, and Technologies 2007: Environmental Monitoring and Ecological Applications; Optical Sensors in Biological, Chemical, and Engineering Technologies; and Femtosecond Laser Pulse Filamentation, 67332L (9 July 2007); doi: 10.1117/12.753170
Show Author Affiliations
Noëlle Lascoux, Univ. Claude Bernard Lyon 1, CNRS (France)
R. Ackermann, Univ. Claude Bernard Lyon 1, CNRS (France)
Guillaume Méjean, Univ. Claude Bernard Lyon 1, CNRS (France)
Estelle Salmon, Univ. Claude Bernard Lyon 1, CNRS (France)
Jérôme Kasparian, Univ. Claude Bernard Lyon 1, CNRS (France)
Jin Yu, Univ. Claude Bernard Lyon 1, CNRS (France)
Steffen Frey, Univ. Claude Bernard Lyon 1, CNRS (France)
R. Salamé, Univ. Claude Bernard Lyon 1, CNRS (France)
Jean-Pierre Wolf, Univ. de Genève (Switzerland)


Published in SPIE Proceedings Vol. 6733:
International Conference on Lasers, Applications, and Technologies 2007: Environmental Monitoring and Ecological Applications; Optical Sensors in Biological, Chemical, and Engineering Technologies; and Femtosecond Laser Pulse Filamentation

© SPIE. Terms of Use
Back to Top