Influence of Source Parameters and Non-Kolmogorov Turbulence on Evolution Properties of Radial Phased-Locked Partially Coherent Vortex Beam Array

Abstract

Partially coherent optical vortices have been applicated widely to reduce the influence of atmospheric turbulence, especially for free-space optical (FSO) communication. Furthermore, the beam array is an effective way to increase the power of the light source, and can increase the propagation distance of the FSO communication system. Herein, we innovatively report evolution properties of the radial phased-locked partially coherent vortex (RPLPCV) beam array in non-Kolmogorov turbulence. The analytical expressions for the cross-spectral density and the average intensity of an RPLPCV beam array propagated through non-Kolmogorov turbulence are obtained. The numerical results reveal that the intensity distribution of the RPLPCV array propagated in the non-Kolmogorov turbulence is gradually converted to a standard Gaussian distribution. In addition, the larger the radial radius, radial number and waist radius are, the smaller the coherence length is. Moreover, the longer the wavelength is, the shorter the propagation distance required for the intensity distribution of the RPLPCV beam array to be converted into a Gaussian distribution in the non-Kolmogorov turbulence. The research in this paper provides a theoretical reference for the selection of light sources and the suppression of turbulence effects in wireless optical communication.

Propagation Characteristics of a Partially Coherent Gaussian Schell‐model Array Vortex Beam in the Joint Turbulence Effect of a Jet Engine and Atmosphere

“…Furthermore, the evolution of the behavior of vortex array beams has opened up a new study field; Singh et al, [32] proposed an experimental demonstration of a vortex array embedded in a partially coherent beam. Various vortex array beams have also been studied, including the radial phase-locked partially coherent flat-topped vortex array beam, [33] the radial phase-locked multi-Gaussian Schell-model vortex array beam, [34] and the radial phase-locked partially coherent vortex beam array, [35] flat-topped Gaussian vortex beam, [36] Gaussian Schell-model vortex beam, [37] partially coherence electromagnetic rotating elliptical Gaussian vortex beam. [38] On the other hand, because of their wide range of applications and benefits in terms of security and communication, airborne laser systems have become more interesting for installation on airplanes.…”

Recognizing OAM Modes of Electromagnetic Laguerre‐Gaussian Schell‐Model Vortex Beams in Atmospheric Turbulence from Polarization

“…[ 8 ] Additionally, the study discovered that partially coherent vortex beams have better anti‐turbulence ability when compared to fully coherent vortex beams. [ 9,10 ] In order to describe the vector beam and investigating the cross spectral density matrix components of the vector beam to analyzing the spectrum, coherence, and polarization properties of vector beams, Wolf et al. [ 11 ] proposed the unified theory of polarization and coherence in 2003.…”

“…[8] Additionally, the study discovered that partially coherent vortex beams have better anti-turbulence ability when compared to fully coherent vortex beams. [9,10] In order to describe the vector beam and investigating the cross spectral density matrix components of the vector beam to analyzing the spectrum, coherence, and polarization properties of vector beams, Wolf et al [11] proposed the unified theory of polarization and coherence in 2003. The introduction of this theory substantially simplifies the outcomes of theoretical calculations, and it also serves as the primary approach for analyzing the propagation and polarization properties of various partially coherent vector beams.…”