Intensity and Coherence Characteristics of a Radial Phase-Locked Multi-Gaussian Schell-Model Vortex Beam Array in Atmospheric Turbulence

Jialu Zhao,Xiaolu Ma,Hongming Yin,Dajun Liu,Yaochuan Wang,Guiqiu Wang,Haiyang Zhong

doi:10.3390/photonics8010005

Abstract

The theoretical descriptions for a radial phase-locked multi-Gaussian Schell-model vortex (RPLMGSMV) beam array is first given. The normalized intensity and coherence distributions of a RPLMGSMV beam array propagating in free space and atmospheric turbulence are illustrated and analyzed. The results show that a RPLMGSMV beam array with larger total number N or smaller coherence length σ can evolve into a beam with better flatness when the beam array translating into the flat-topped profile at longer distance z and the flatness of the flat-topped intensity distribution can be destroyed by the atmospheric turbulence at longer distance z. The coherence distribution of a RPLMGSMV beam array in atmospheric turbulence at the longer distance will have Gaussian distribution. The research results will be useful in free space optical communication using a RPLMGSMV beam array.

Highlights

With the development of wireless optical communication and laser radar, the evolutions of laser beams in atmospheric turbulence were widely studied in past years [1]
To obtain the flat-topped intensity profiles, the multi-Gaussian Schell-model (MGSM) beam arrays propagating in turbulence are investigated, and it is found that the MGSM beam arrays can achieve the better flat-topped profiles [31,32]
We extend MGSM vortex beam into the radial phaselocked multi-Gaussian-Schell-model vortex (RPLMGSMV) beam array, and investigate the intensity and coherence properties of RPLMGSMV beam array propagating in free space and atmospheric turbulence

Summary

Introduction

With the development of wireless optical communication and laser radar, the evolutions of laser beams in atmospheric turbulence were widely studied in past years [1].

Results

Conclusion