Propagation properties of vortex cosine-hyperbolic-Gaussian beams through oceanic turbulence

Abstract

Based on the extended Huygens-Fresnel diffraction integral, the analytical expression of the average intensity for a vortex cosine hyperbolic-Gaussian beam (vChGB) propagating in oceanic turbulence is derived in detail. From the derived formula, the propagation properties of a vChGB in oceanic turbulence, including the average intensity distribution and the beam spreading are discussed with numerical examples. It is shown that oceanic turbulence influences strongly the propagation properties of the beam in the turbulent medium. The vChGB may propagate within shorter distance in weak oceanic turbulence by increasing the dissipation rate of mean-square temperature and the ratio of temperature to salinity fluctuation or by increasing the dissipation rate of turbulent kinetic energy per unit mass of sea water. Meanwhile, the evolution properties of the vChGB in the oceanic turbulence are affected by the initial beam parameters, namely the decentered parameter b, the topological charge M, the beam waist width 0 and the wavelength .The obtained results can be beneficial for applications in optical underwater communication and remote sensing domain, imaging, and so on.

Propagation properties of partially coherent vortex cosine-hyperbolic-Gaussian beams through oceanic turbulence

“…The beam propagation properties can used in many practical applications, such as optical trapping, micromanipulation, beam splitting, and optical communications. The propagation characteristics of the PCvChGB through a paraxial focusing system, and in a turbulent atmosphere have also been investigated in detail (Lazrek et al 2021;Hricha et al 2022aHricha et al , 2022bLazrek et al 2022]. However, to the best of our knowledge, the evolution properties of PCvChGB in oceanic turbulence have not been reported yet.…”

Propagation of hollow higher-order cosh-Gaussian beam in oceanic turbulence

“…Besides that, the mean-square beam displacement of Gaussian beam propagating in oceanic turbulence increases as the propagation distance increase, while decreasing as the wind speed increases (Li et al 2022). The central peak rise speed of the vortex cosine-hyperbolic-Gaussian beam becomes faster as the oceanic turbulence becomes stronger (Lazrek et al 2022). Recently, received intensity and effective beam spot radius of lots of partially coherent beams are analyzed based on one derived equation (Chib et al 2023).…”

Propagation properties of helical Ince–Gaussian beam in oceanic turbulence

“…Compared with the Gaussian mode, higher-order transverse mode has more adjustable terms due to its complex structure and has greater application potential in the field of optical communication. At present, the propagation characteristics of Lommel-Gaussian pulsed beam 2 , Hypergeometric-Gaussian beam 3 , vortex cosinehyperbolic-Gaussian beam 4 , rotationally-symmetric power-exponent-phase vortex beam 5 and other high-order transverse modes in oceanic turbulence have been studied.…”