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Self-focusing of pseudo-nondiffracting laser beams with circular symmetry in collisional plasma under two ramp density profiles

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Abstract

The self-focusing of zeroth-order Bessel–Gaussian beams through plasma under exponential and tangential ramp density profiles is investigated theoretically by using Wentzel–Kramers–Brillouin approximation. To examine the effect of plasma density ramp on self-focusing of the studied beams, the evolution of beam-width parameter with normalized propagation distance is reported for diverse laser beams and plasma parameters. The results reveal that stronger self-focusing is obtained with exponential ramp density profile as compared to the tangential density ramp one.

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Authors and Affiliations

  1. LPNAMME - Laser Physics Group, Department of Physics, Faculty of Sciences, University Chouaïb Doukkali, P. B.: 20, 24000, El Jadida, Morocco

    L. Ouahid, L. Dalil-Essakali & A. Belafhal

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  1. L. Ouahid
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  2. L. Dalil-Essakali
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  3. A. Belafhal
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Correspondence to A. Belafhal.

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Ouahid, L., Dalil-Essakali, L. & Belafhal, A. Self-focusing of pseudo-nondiffracting laser beams with circular symmetry in collisional plasma under two ramp density profiles. Opt Quant Electron 51, 183 (2019). https://doi.org/10.1007/s11082-019-1903-z

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