Scintillation mitigation via the cross phase of the Gaussian Schell-model beam in a turbulent atmosphere

Abstract

Scintillation is an important problem for laser beams in free space optical (FSO) communications. We derived the analytical expressions for the scintillation index of a Gaussian Schell-model beam with cross phase propagation in a turbulent atmosphere. The numerical results show that the quadratic phase can be used to mitigate turbulence-induced scintillation, and the effects of the turbulent strength and beam parameters at the source plane on the scintillation index are analyzed. The variation trend of the experimentally measured scintillation index is consistent with the numerical results. Our results are expected to be useful for FSO communications.

Statistical Properties of a Twisted Gaussian Schell-Model Beam Carrying the Cross Phase in a Turbulent Atmosphere

“…Applying the extended Huygens-Fresnel integral [39], the propagation of the twisted Gaussian Schell-model beam carrying the cross phase can be expressed as…”

“…On the other hand, as laser beams serve as the primary medium for optical communication, it is very important to study their propagation characteristics in the presence of atmospheric turbulence [2,3,29,[35][36][37][38][39]. In comparison to coherent beams, partially coherent beams offer more possibilities to mitigate the adverse effects caused by turbulence [2,3,29,36].…”

Analysis of finite energy fresnel bessel beams scintillation level in turbulent communication links

“…Furthermore, the scintillation index of vortex symmetric Airy beam decreases as the decay factor decreases [8]. The direct relation between the scintillation index and the coherence length of Gaussian Schell-model beam is plotted in [9]. The scintillation of truncated Bessel beams is also investigated where it is found that zeroth-order Bessel beams have the lowest scintillation [10].…”

Evolution of the Phase Singularity of an Orbital Angular Momentum Beam with an Astigmatism Phase

“…The topological charge of Laguerre-Gaussian beams has a deterministic relationship with the number of side lobes in the Hermite-Gaussian profile, and this relationship is independent of the optical coherence of the beam, even at extremely low coherence levels [24]. Additionally, by utilizing the cross phase, the beam can be rotated during propagation, autofocusing can be performed flexibly, the z-coherence can be enhanced, beam polygonal shaping can be executed, and the beam scintillation of the turbulent disturbance can be mitigated [25][26][27][28][29][30][31]. The cross-phase provides the partially coherent beam with the ability to shape distortions that may occur owing to optical diffraction and obstacles, facilitating robust far-field optical imaging [32][33][34].…”