Spindler, Gerhard and Paunescu, Gabriela (2008) Multifilamentation of femtosecond laser pulses propagating in turbulent air near the ground. Applied Physics B, 96 (1), pp. 185-191. Springer Berlin / Heidelberg. 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 , 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.
|Title:||Multifilamentation of femtosecond laser pulses propagating in turbulent air near the ground|
|Date:||7 November 2008|
|Journal or Publication Title:||Applied Physics B|
|In Open Access:||No|
|In ISI Web of Science:||Yes|
|Page Range:||pp. 185-191|
|Publisher:||Springer Berlin / Heidelberg|
|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 (old)|
|HGF - Program:||Aeronautics|
|HGF - Program Themes:||Rotorcraft|
|DLR - Research area:||Aeronautics|
|DLR - Program:||L - no assignement|
|DLR - Research theme (Project):||L - Laser Research and Technology|
|Institutes and Institutions:||Institute of Technical Physics|
|Deposited By:||Dr.rer.nat. Gerhard Spindler|
|Deposited On:||20 Jul 2009 21:34|
|Last Modified:||15 Jan 2010 00:25|
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