Femtosecond filamentation in turbulent air

Houard, Aurélien; Michel, F. C.; Prade, B.; Durécu, Anne; Lombard, Laurent; Bourdon, P.; Vasseur, Olivier; Fleury, Bruno; Robert, Clélia; Michau, Vincent; Couairon, Arnaud; Mysyrowicz, A.

doi:10.1103/physreva.78.033804

Cited by 58 publications

(35 citation statements)

References 34 publications

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“…Although this model ignores dispersion, which can be nonnegligible for propagation of high-intensity short pulses and collisional ionization, it effectively simulates beam profiles of air filaments and is computationally economical compared with full (3D + 1) simulations. Another factor that can potentially influence beam propagation by inducing beam asymmetry and the pointing instability is air turbulence [27,[36][37][38]. However, as suggested by Roskey et al [39], typical laboratory air turbulence has a negligible effect in our case because of the small beam size ( 1 mm) and relatively short propagation distance (<10 m), which is corroborated by our measurements showing clean, symmetric beam profiles during filamentation [see Fig.…”

supporting

confidence: 87%

Controlled interactions of femtosecond light filaments in air

et al. 2010

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We experimentally demonstrate coherent control of two light filaments in air generated by ultrafast laser pulses, as proposed by Xi et al. [Phys. Rev. Lett. 96, 025003 (2006)]. We show that depending on the relative phase and the incidence angle, the filaments can experience fusion, repulsion, energy redistribution, and spiral motion for propagation in air. By translating the initial beams on subwavelength scales, we achieve ∼1-mm transverse deflection of approximately 0.5-mJ energy for parallel propagation and 7 • angular deflection for spiral motion in 3-m propagation. Our approach using the relative beam phases to reliably control propagation of femtosecond light filaments is potentially applicable to remote sensing and lightning guiding.

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supporting

confidence: 87%

Controlled interactions of femtosecond light filaments in air

et al. 2010

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“…Salame et al performed laboratory propagation experiments over regions of extended turbulence and proposed that the probability of filament transmission can be parameterized by the product C 2 n L, where C 2 n is the structure parameter for turbulence and L is the propagation distance [15]. Houard et al [16] used simulations to characterize the competition between self-focusing and modulational instability (MI) [17], and how these processes affect the filamentation distance of a beam in turbulence.…”

Section: Introductionmentioning

confidence: 99%

Theoretical and numerical investigation of filament onset distance in atmospheric turbulence

et al. 2014

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We analyze and simulate the propagation of laser beams with powers larger than the nonlinear self-focusing power through atmospheric turbulence. Turbulence-induced filamentation is theoretically described in terms of wholebeam self-focusing and transverse modulational instability. We describe a numerical simulation method to model nonlinear focusing in turbulence. We find good agreement between our simulation and a previously published laboratory-scale experiment. Simulations are then performed to calculate probability distributions for filament onset and wander over kilometer distances, and are compared with theory. The theoretical model can be made to agree with the simulations for physically meaningful choices of a few fitting parameters. We also examine the use of focusing optics to control filamentation range of modulationally unstable beams.

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“…in the case of multiple élamentation of highpower pulses, the turbulence considerably reduces the distance to the érst élament. At the same time, during the formation of one élament, the distance to its onset increased with increasing turbulence [27]. In the case of formation of two élaments in the cross section of the pulse, the increase in the distance z fil to the élament onset changed to its decrease at larger values of C 2 n [28].…”

Section: Phase Modulationmentioning

confidence: 99%

Control of filamentation of femtosecond laser pulses in a turbulent atmosphere

Shlenov

Markov

2009

Quantum Electron.

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Various methods for controlling the onset of élamentation of a high-power laser pulse in extended vertical atmospheric paths are analysed. It is shown that the increase in the structure constant of the atmospheric turbulence on average leads to the earlier formation of`hot' spots when the initial pulse power exceeds the critical self-focusing power by an order of magnitude and more. It is found in the numerical experiments that the use of broad focused beams is preferable for achieving the minimal standard deviation of a distance for the élament onset.

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Femtosecond filamentation in turbulent air

Cited by 58 publications

References 34 publications

Controlled interactions of femtosecond light filaments in air

Controlled interactions of femtosecond light filaments in air

Theoretical and numerical investigation of filament onset distance in atmospheric turbulence

Control of filamentation of femtosecond laser pulses in a turbulent atmosphere

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