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Open AccessArticle

Propagation Characteristics of High-Power Vortex Laguerre-Gaussian Laser Beams in Plasma

Fujian Key Laboratory of Light Propagation and Transformation, College of Information Science and Engineering, Huaqiao University, No. 668, Jimei Avenue, Jimei District, Xiamen 361021, China
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Appl. Sci. 2018, 8(5), 665; https://doi.org/10.3390/app8050665
Received: 3 April 2018 / Revised: 19 April 2018 / Accepted: 19 April 2018 / Published: 25 April 2018
(This article belongs to the Section Optics and Lasers)
The propagation characteristics of high-power laser beams in plasma is an important research topic and has many potential applications in fields such as laser machining, laser-driven accelerators and laser-driven inertial confined fusion. The dynamic evolution of high-power Laguerre-Gaussian (LG) beams in plasma is numerically investigated by using the finite-difference time-domain (FDTD) method based on the nonlinear Drude model, with both plasma frequency and collision frequency modulated by the light intensity of laser beam. The numerical algorithms and implementation techniques of FDTD method are presented for numerically simulating the nonlinear permittivity model of plasma and generating the LG beams with predefined parameters. The simulation results show that the plasma has different field modulation effects on the two exemplified LG beams with different cross-sectional patterns. The self-focusing and stochastic absorption phenomena of high-power laser beam in plasma are also demonstrated. This research also provides a new means for the field modulation of laser beams by plasma. View Full-Text
Keywords: plasma; high-power laser beams; ponderomotive nonlinearity; FDTD method plasma; high-power laser beams; ponderomotive nonlinearity; FDTD method
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Lin, Z.; Chen, X.; Qiu, W.; Pu, J. Propagation Characteristics of High-Power Vortex Laguerre-Gaussian Laser Beams in Plasma. Appl. Sci. 2018, 8, 665.

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