Advances in intense femtosecond laser filamentation in air

Chin, See Leang; Wang, T. J.; Marceau, Claude; Wu, Jian; Liu, J. S.; Kosareva, O.G.; Panov, N. A.; Chen, Y. P.; Daigle, J.-F.; Yuan, Shuai; Azarm, A.; Liu, W. W.; Seideman, Tamar; Zeng, Heping; Richardson, Martin; Li, R.; Xu, Zhizhan

doi:10.1134/s1054660x11190054

Cited by 238 publications

(126 citation statements)

References 251 publications

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“…In the simulation of optical filamentation, which is the main intended application of the MESA, the interplay between the nonlinearity and pulse propagation effects leads to the well-known intensity clamping [25]. This suggests that one way to judge the accuracy of the post-adiabatically corrected MESA is to examine the difference in the clamped intensity inside a filament.…”

Section: A Ionization In Femtosecond Pulsesmentioning

confidence: 99%

Nonlinear optical response of noble gases via the metastable electronic state approach

2016

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The goal of this paper is to elucidate the theoretical underpinnings of the metastable electronic state approach (MESA) and demonstrate its utility for the evaluation of the nonlinear optical response of noble-gas atoms with emphasis on the application of the method to the propagation of multicolor optical fields in large-scale, spatially resolved simulations. More specifically, single-active-electron models of various atoms are employed to calculate their nonlinear properties both within the adiabatic approximation, involving a single metastable state and beyond, capturing inertial effects, and wavelength-dependent ionization. Simulations for excitation pulses at different center wavelengths as well as ionization in two-color pulses are presented and compared with numerical solutions of the time-dependent Schrödinger equation. Illustrative examples of the numerical simulation of high-power pulse propagation incorporating MESA data are also presented and showcase the successful application to optical filamentation in the midinfrared region.

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Section: A Ionization In Femtosecond Pulsesmentioning

confidence: 99%

Nonlinear optical response of noble gases via the metastable electronic state approach

2016

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“…In this topic, the formation of a fs filament that stably propagates over a long propagation-distance is compulsory for particular applications [25], such as Light Detection and Ranging (LiDAR), remote sensing of atmospheric pollution, pulse compression, electric charge triggering and guiding, and remote Terahertz pulse generation. Among various phenomena associated with the filamenation process, the periodic self-focusing and defocussing is the principle phenomena that exposes the filament formation, and combined with other dynamics at specific input beam parameters, this phenomena can stably control the properties of the formed filament over a lengthen distance.…”

Section: The Periodic Self-focusing and Defocussingmentioning

confidence: 99%

Fourier Pseudospectral Solution for a 2D Nonlinear Paraxial Envelope Equation of Laser Interactions in Plasmas

Mahdy¹

2016

JAMP

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We apply a Fourier pseudospectral algorithm to solve a 2D nonlinear paraxial envelope-equation of laser interactions in plasmas. In this algorithm, we first use the second order Strang time-splitting method to split the envelope-equation into a number of equations, next we spatially discrete the filed quantity and its spatial derivatives in these equations in term of Fourier interpolation polynomials (FFT), finally we sequentially integrate the resultant equations by means of a discrete integration method in order to obtain the solution of the envelope-equation. We carry out several numerical tests to illustrate the efficiency and to determine accuracy of the algorithm. In addition, we conduct a number of numerical experiments to examine its performance. The numerical results have shown that the algorithm is highly efficient and sufficiently accurate to solve the 2D envelope-equation, furthermore, it yields an optimal performance in simulating fundamental phenomena in laser interactions in plasmas.

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Section: Introductionmentioning

confidence: 99%

“…The main physical mechanism of femtosecond laser FIL is well known to be a dynamic equilibrium between self-focusing by the optical Kerr effect and defocusing by a self-generated plasma produced by multiphoton/tunnel ionization [3][4][5] . During femtosecond laser FIL in air, many nonlinear effects occur simultaneously, such as intensity clamping, molecular alignment, harmonic generation, self-phase modulation and so on [3][4][5] . These complex and interesting nonlinear phenomena accompanying femtosecond laser FIL lead to promising applications in different fields, such as remote sensing [6,7] , few-cycle pulse compression [8] , atmospheric condensation and precipitation [9][10][11] , secondary light source generation ranging from air lasing to terahertz emission [12][13][14][15][16][17][18] , and triggering and guiding high-voltage discharge with possible applications in lightning control [19][20][21][22][23][24] .…”

Section: Introductionmentioning

confidence: 99%

Spectroscopic analysis of high electric field enhanced ionization in laser filaments in air for corona guiding

Wei

Liu

Wang

et al. 2016

High Pow Laser Sci Eng

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We report on a systematic experimental study on the fluorescence spectra produced from a femtosecond laser filament in air under a high electric field. The electric field alone was strong enough to create corona discharge (CD). Fluorescence spectra from neutral and ionic air molecules were measured and compared with pure high-voltage CD and pure laser filamentation (FIL). Among them, high electric field assisted laser FIL produced nitrogen fluorescence more efficiently than either pure CD or pure FIL processes. The nonlinear enhancement of fluorescence from the interaction of the laser filament and corona discharging electric field resulted in a more efficient ionization along the laser filament zone, which was confirmed by the spectroscopic measurement of both ionization-induced fluorescence and plasma-scattered 800 nm laser pulses. This is believed to be the key precursor process for filament-guided discharge.

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Advances in intense femtosecond laser filamentation in air

Cited by 238 publications

References 251 publications

Nonlinear optical response of noble gases via the metastable electronic state approach

Nonlinear optical response of noble gases via the metastable electronic state approach

Fourier Pseudospectral Solution for a 2D Nonlinear Paraxial Envelope Equation of Laser Interactions in Plasmas

Spectroscopic analysis of high electric field enhanced ionization in laser filaments in air for corona guiding

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