Matter and Radiation at Extremes, Volume. 8, Issue 2, 025903(2023)

Generation of high intensity speckles in overlapping laser beams

Liang Hao... Jie Qiu and Wen Yi Huoa) |Show fewer author(s)
Author Affiliations
  • Laboratory of Computational Physics, Institute of Applied Physics and Computational Mathematics, Beijing 100094, China
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    Figures & Tables(9)
    (a)–(d) Normalized absolute amplitude of the vector potential on different slices in the x̂–ŷ plane at z = 0λc, 170λc, 340λc, and 512λc for beams 1 [(a) and (c)] and 2 [(b) and (d)] in cases I [(a) and (b)] and II [(c) and (d)]. (e) and (f) Normalized absolute amplitude of the vector potential on a slice in the ŷ–ẑ plane at x = 185λc for beam 2 in cases I and II, respectively.
    (a) and (b) FOPAI of beams 1 and 2, respectively, diagnosed in the outgoing x̂–ŷ plane in the different cases listed in Table I. Solid and dashed lines denote the polarization components in the x and y directions, respectively.
    Real and imaginary parts (orange and blue lines, respectively) of the plasma coupling coefficient K vs the wavelength separation between two beams when the plasma flow velocity is zero.
    Normalized absolute amplitude of the x [(a) and (b)] and y [(c) and (d)] polarization components of the vector potential on different slices in the x̂–ŷ plane at z = 0λc, 170λc, 340λc, and 512λc for beams 1 [(a) and (c)] and 2 [(b) and (d)] in case III.
    Normalized absolute amplitude of the x [(a) and (b)] and y [(c) and (d)] polarization components of the vector potential on different slices in the x̂–ŷ plane at z = 0λc, 170λc, 340λc, and 512λc for beams 1 [(a) and (c)] and 2 [(b) and (d)] in case IV.
    (a) Normalized absolute amplitude of the vector potential on different slices in the x̂–ŷ plane at z = 0λc, 170λc, 340λc, and 512λc for scattered light from SBS in case II. (b) Normalized absolute amplitude of the density perturbation on different slices in the x̂–ŷ plane at z = 0λc, 170λc, 340λc, and 512λc corresponding to the ion-acoustic wave stimulated by beam 2 in case II.
    Normalized absolute amplitude of the vector potential on different slices in the x̂–ŷ plane at z = 0λc, 170λc, 340λc, and 512λc for (a) beam 1, (b) beam 2, (c) beam 3, and (d) beam 4 in the case of four overlapping beams.
    FOPAI of beams 1 and 2 (solid and dashed lines, respectively) diagnosed in the outgoing x̂–ŷ plane. The red curves are for case II of two beams and the black curves for the case of four overlapping beams.
    • Table 1. Simulations of propagation of two overlapping beams.

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      Table 1. Simulations of propagation of two overlapping beams.

      CaseLaser conditionSwitch of coupling
      ICPP in same polarizationOff
      IICPP in same polarizationOn
      IIICPP in different polarizationOn
      IVCPP + PSOn
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    Liang Hao, Jie Qiu, Wen Yi Huo. Generation of high intensity speckles in overlapping laser beams[J]. Matter and Radiation at Extremes, 2023, 8(2): 025903

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    Paper Information

    Category: Inertial Confinement Fusion Physics

    Received: Aug. 31, 2022

    Accepted: Jan. 22, 2023

    Published Online: Apr. 12, 2023

    The Author Email: Huo Wen Yi (huo_wenyi@iapcm.ac.cn)

    DOI:10.1063/5.0123585

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