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Multifilamentation of femtosecond laser pulses propagating in turbulent air near the ground

Spindler, Gerhard and Paunescu, Gabriela (2009) Multifilamentation of femtosecond laser pulses propagating in turbulent air near the ground. Applied Physics B, 96 (1), pp. 185-191. Springer. doi: [10.1007/s00340-009-3409-z]. ISSN 0946-2171 (Print) 1432-0649 (Online).

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The propagation of femtosecond laser pulses in turbulent air near the ground is analyzed. Confining to a power regime distinctly above the critical power for self-focusing, i.e. , and concentrating on initial peak intensities around 2.5 x 10^11W/cm^2 , the onset and early evolution of multiple filaments are addressed. Making use of the turbulence phase-screen method, numerical simulations of the pulse propagation indicate that turbulence fields with spatial scales below 6 mm are able to induce the onset of multifilamentation. An analytical linear plane wave perturbation model of the underlying modulation instability of the pulse front is introduced in support of the computational results. By this means, insight into the amplification of an initial perturbation of the pulse front from the point of view of the spatial frequency domain is given.

Item URL in elib:https://elib.dlr.de/60487/
Document Type:Article
Title:Multifilamentation of femtosecond laser pulses propagating in turbulent air near the ground
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Spindler, Gerhardgerhard.spindler (at) dlr.deUNSPECIFIED
Paunescu, Gabrielagabriela.paunescu (at) dlr.deUNSPECIFIED
Date:3 March 2009
Journal or Publication Title:Applied Physics B
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
DOI :[10.1007/s00340-009-3409-z]
Page Range:pp. 185-191
EditorsEmailEditor's ORCID iD
Träger, FrankTraeger@physik.uni-kassel.deUNSPECIFIED
Series Name:Lasers and Optics
ISSN:0946-2171 (Print) 1432-0649 (Online)
Keywords:Femtosecond Pulse Laser, Propagation, Filamentation, Air Turbulence, spatial solitons, numerical simulation
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Aircraft Research (old)
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Laser Research and Technology (old)
Location: Stuttgart
Institutes and Institutions:Institute of Technical Physics
Deposited By: Spindler, Dr.rer.nat. Gerhard
Deposited On:29 Oct 2009 22:20
Last Modified:10 Jan 2019 15:46

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